Merge branch 'master' into fix-core-dump-shared

22 files changed, 180 insertions, 154 deletions

diff --git a/.travis.yml b/.travis.yml
index 180728a6..2fbb3b16 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -12,27 +12,29 @@ matrix:
   include:
     - os: linux
       compiler: gcc
-      sudo: true
-      cache:
+      sudo : true
       install: ./ci/install-linux.sh && ./ci/log-config.sh
       script: ./ci/build-linux-bazel.sh
     - os: linux
       compiler: clang
-      sudo: true
-      cache:
+      sudo : true
       install: ./ci/install-linux.sh && ./ci/log-config.sh
       script: ./ci/build-linux-bazel.sh
     - os: linux
+      group: deprecated-2017Q4
       compiler: gcc
       install: ./ci/install-linux.sh && ./ci/log-config.sh
       script: ./ci/build-linux-autotools.sh
     - os: linux
+      group: deprecated-2017Q4
       compiler: gcc
       env: BUILD_TYPE=Debug VERBOSE=1 CXX_FLAGS=-std=c++11
     - os: linux
+      group: deprecated-2017Q4
       compiler: clang
       env: BUILD_TYPE=Debug VERBOSE=1
     - os: linux
+      group: deprecated-2017Q4
       compiler: clang
       env: BUILD_TYPE=Release VERBOSE=1 CXX_FLAGS=-std=c++11
     - os: osx
diff --git a/googletest/build-aux/.keep b/googletest/build-aux/.keep
deleted file mode 100644
index e69de29b..00000000
--- a/googletest/build-aux/.keep
+++ /dev/null
diff --git a/googletest/include/gtest/gtest-death-test.h b/googletest/include/gtest/gtest-death-test.h
index 957a69c6..6a216bcb 100644
--- a/googletest/include/gtest/gtest-death-test.h
+++ b/googletest/include/gtest/gtest-death-test.h
@@ -102,7 +102,7 @@ GTEST_API_ bool InDeathTestChild();
 //   On POSIX-compliant systems (*nix), we use the <regex.h> library,
 //   which uses the POSIX extended regex syntax.
 //
-//   On other platforms (e.g. Windows), we only support a simple regex
+//   On other platforms (e.g. Windows or Mac), we only support a simple regex
 //   syntax implemented as part of Google Test.  This limited
 //   implementation should be enough most of the time when writing
 //   death tests; though it lacks many features you can find in PCRE
@@ -272,6 +272,54 @@ class GTEST_API_ KilledBySignal {
 # endif  // NDEBUG for EXPECT_DEBUG_DEATH
 #endif  // GTEST_HAS_DEATH_TEST
 
+// This macro is used for implementing macros such as
+// EXPECT_DEATH_IF_SUPPORTED and ASSERT_DEATH_IF_SUPPORTED on systems where
+// death tests are not supported. Those macros must compile on such systems
+// iff EXPECT_DEATH and ASSERT_DEATH compile with the same parameters on
+// systems that support death tests. This allows one to write such a macro
+// on a system that does not support death tests and be sure that it will
+// compile on a death-test supporting system. It is exposed publicly so that
+// systems that have death-tests with stricter requirements than
+// GTEST_HAS_DEATH_TEST can write their own equivalent of
+// EXPECT_DEATH_IF_SUPPORTED and ASSERT_DEATH_IF_SUPPORTED.
+//
+// Parameters:
+//   statement -  A statement that a macro such as EXPECT_DEATH would test
+//                for program termination. This macro has to make sure this
+//                statement is compiled but not executed, to ensure that
+//                EXPECT_DEATH_IF_SUPPORTED compiles with a certain
+//                parameter iff EXPECT_DEATH compiles with it.
+//   regex     -  A regex that a macro such as EXPECT_DEATH would use to test
+//                the output of statement.  This parameter has to be
+//                compiled but not evaluated by this macro, to ensure that
+//                this macro only accepts expressions that a macro such as
+//                EXPECT_DEATH would accept.
+//   terminator - Must be an empty statement for EXPECT_DEATH_IF_SUPPORTED
+//                and a return statement for ASSERT_DEATH_IF_SUPPORTED.
+//                This ensures that ASSERT_DEATH_IF_SUPPORTED will not
+//                compile inside functions where ASSERT_DEATH doesn't
+//                compile.
+//
+//  The branch that has an always false condition is used to ensure that
+//  statement and regex are compiled (and thus syntactically correct) but
+//  never executed. The unreachable code macro protects the terminator
+//  statement from generating an 'unreachable code' warning in case
+//  statement unconditionally returns or throws. The Message constructor at
+//  the end allows the syntax of streaming additional messages into the
+//  macro, for compilational compatibility with EXPECT_DEATH/ASSERT_DEATH.
+# define GTEST_UNSUPPORTED_DEATH_TEST(statement, regex, terminator) \
+    GTEST_AMBIGUOUS_ELSE_BLOCKER_ \
+    if (::testing::internal::AlwaysTrue()) { \
+      GTEST_LOG_(WARNING) \
+          << "Death tests are not supported on this platform.\n" \
+          << "Statement '" #statement "' cannot be verified."; \
+    } else if (::testing::internal::AlwaysFalse()) { \
+      ::testing::internal::RE::PartialMatch(".*", (regex)); \
+      GTEST_SUPPRESS_UNREACHABLE_CODE_WARNING_BELOW_(statement); \
+      terminator; \
+    } else \
+      ::testing::Message()
+
 // EXPECT_DEATH_IF_SUPPORTED(statement, regex) and
 // ASSERT_DEATH_IF_SUPPORTED(statement, regex) expand to real death tests if
 // death tests are supported; otherwise they just issue a warning.  This is
@@ -284,9 +332,9 @@ class GTEST_API_ KilledBySignal {
     ASSERT_DEATH(statement, regex)
 #else
 # define EXPECT_DEATH_IF_SUPPORTED(statement, regex) \
-    GTEST_UNSUPPORTED_DEATH_TEST_(statement, regex, )
+    GTEST_UNSUPPORTED_DEATH_TEST(statement, regex, )
 # define ASSERT_DEATH_IF_SUPPORTED(statement, regex) \
-    GTEST_UNSUPPORTED_DEATH_TEST_(statement, regex, return)
+    GTEST_UNSUPPORTED_DEATH_TEST(statement, regex, return)
 #endif
 
 }  // namespace testing
diff --git a/googletest/include/gtest/gtest-message.h b/googletest/include/gtest/gtest-message.h
index fe879bca..8bc28d28 100644
--- a/googletest/include/gtest/gtest-message.h
+++ b/googletest/include/gtest/gtest-message.h
@@ -196,7 +196,6 @@ class GTEST_API_ Message {
   std::string GetString() const;
 
  private:
-
 #if GTEST_OS_SYMBIAN
   // These are needed as the Nokia Symbian Compiler cannot decide between
   // const T& and const T* in a function template. The Nokia compiler _can_
diff --git a/googletest/include/gtest/gtest-param-test.h b/googletest/include/gtest/gtest-param-test.h
index 83dd8daa..19fae396 100644
--- a/googletest/include/gtest/gtest-param-test.h
+++ b/googletest/include/gtest/gtest-param-test.h
@@ -38,6 +38,7 @@
 //
 // This file is generated by a SCRIPT.  DO NOT EDIT BY HAND!
 //
+
 #ifndef GTEST_INCLUDE_GTEST_GTEST_PARAM_TEST_H_
 #define GTEST_INCLUDE_GTEST_GTEST_PARAM_TEST_H_
 
@@ -79,7 +80,7 @@ TEST_P(FooTest, HasBlahBlah) {
 // Finally, you can use INSTANTIATE_TEST_CASE_P to instantiate the test
 // case with any set of parameters you want. Google Test defines a number
 // of functions for generating test parameters. They return what we call
-// (surprise!) parameter generators. Here is a  summary of them, which
+// (surprise!) parameter generators. Here is a summary of them, which
 // are all in the testing namespace:
 //
 //
@@ -268,7 +269,7 @@ internal::ParamGenerator<T> Range(T start, T end) {
 // each with C-string values of "foo", "bar", and "baz":
 //
 // const char* strings[] = {"foo", "bar", "baz"};
-// INSTANTIATE_TEST_CASE_P(StringSequence, SrtingTest, ValuesIn(strings));
+// INSTANTIATE_TEST_CASE_P(StringSequence, StringTest, ValuesIn(strings));
 //
 // This instantiates tests from test case StlStringTest
 // each with STL strings with values "a" and "b":
@@ -1413,24 +1414,26 @@ internal::CartesianProductHolder10<Generator1, Generator2, Generator3,
 // alphanumeric characters or underscore. Because PrintToString adds quotes
 // to std::string and C strings, it won't work for these types.
 
-# define INSTANTIATE_TEST_CASE_P(prefix, test_case_name, generator, ...) \
-  static ::testing::internal::ParamGenerator<test_case_name::ParamType> \
-      gtest_##prefix##test_case_name##_EvalGenerator_() { return generator; } \
-  static ::std::string gtest_##prefix##test_case_name##_EvalGenerateName_( \
-      const ::testing::TestParamInfo<test_case_name::ParamType>& info) { \
-    return ::testing::internal::GetParamNameGen<test_case_name::ParamType> \
-        (__VA_ARGS__)(info); \
-  } \
+#define INSTANTIATE_TEST_CASE_P(prefix, test_case_name, generator, ...)        \
+  static ::testing::internal::ParamGenerator<test_case_name::ParamType>        \
+      gtest_##prefix##test_case_name##_EvalGenerator_() {                      \
+    return generator;                                                          \
+  }                                                                            \
+  static ::std::string gtest_##prefix##test_case_name##_EvalGenerateName_(     \
+      const ::testing::TestParamInfo<test_case_name::ParamType>& info) {       \
+    return ::testing::internal::GetParamNameGen<test_case_name::ParamType>(    \
+        __VA_ARGS__)(info);                                                    \
+  }                                                                            \
   static int gtest_##prefix##test_case_name##_dummy_ GTEST_ATTRIBUTE_UNUSED_ = \
-      ::testing::UnitTest::GetInstance()->parameterized_test_registry(). \
-          GetTestCasePatternHolder<test_case_name>(\
-              #test_case_name, \
-              ::testing::internal::CodeLocation(\
-                  __FILE__, __LINE__))->AddTestCaseInstantiation(\
-                      #prefix, \
-                      &gtest_##prefix##test_case_name##_EvalGenerator_, \
-                      &gtest_##prefix##test_case_name##_EvalGenerateName_, \
-                      __FILE__, __LINE__)
+      ::testing::UnitTest::GetInstance()                                       \
+          ->parameterized_test_registry()                                      \
+          .GetTestCasePatternHolder<test_case_name>(                           \
+              #test_case_name,                                                 \
+              ::testing::internal::CodeLocation(__FILE__, __LINE__))           \
+          ->AddTestCaseInstantiation(                                          \
+              #prefix, &gtest_##prefix##test_case_name##_EvalGenerator_,       \
+              &gtest_##prefix##test_case_name##_EvalGenerateName_, __FILE__,   \
+              __LINE__)
 
 }  // namespace testing
 
diff --git a/googletest/include/gtest/gtest-param-test.h.pump b/googletest/include/gtest/gtest-param-test.h.pump
index 504b7d1b..d8870af9 100644
--- a/googletest/include/gtest/gtest-param-test.h.pump
+++ b/googletest/include/gtest/gtest-param-test.h.pump
@@ -78,7 +78,7 @@ TEST_P(FooTest, HasBlahBlah) {
 // Finally, you can use INSTANTIATE_TEST_CASE_P to instantiate the test
 // case with any set of parameters you want. Google Test defines a number
 // of functions for generating test parameters. They return what we call
-// (surprise!) parameter generators. Here is a  summary of them, which
+// (surprise!) parameter generators. Here is a summary of them, which
 // are all in the testing namespace:
 //
 //
@@ -267,7 +267,7 @@ internal::ParamGenerator<T> Range(T start, T end) {
 // each with C-string values of "foo", "bar", and "baz":
 //
 // const char* strings[] = {"foo", "bar", "baz"};
-// INSTANTIATE_TEST_CASE_P(StringSequence, SrtingTest, ValuesIn(strings));
+// INSTANTIATE_TEST_CASE_P(StringSequence, StringTest, ValuesIn(strings));
 //
 // This instantiates tests from test case StlStringTest
 // each with STL strings with values "a" and "b":
diff --git a/googletest/include/gtest/gtest-typed-test.h b/googletest/include/gtest/gtest-typed-test.h
index 20726b2c..759d1dbd 100644
--- a/googletest/include/gtest/gtest-typed-test.h
+++ b/googletest/include/gtest/gtest-typed-test.h
@@ -243,7 +243,7 @@ INSTANTIATE_TYPED_TEST_CASE_P(My, FooTest, MyTypes);
   } \
   static const char* const GTEST_REGISTERED_TEST_NAMES_(CaseName) \
       GTEST_ATTRIBUTE_UNUSED_ = \
-          GTEST_TYPED_TEST_CASE_P_STATE_(CaseName).VerifyRegisteredTestNames(\
+          GTEST_TYPED_TEST_CASE_P_STATE_(CaseName).VerifyRegisteredTestNames( \
               __FILE__, __LINE__, #__VA_ARGS__)
 
 // The 'Types' template argument below must have spaces around it
diff --git a/googletest/include/gtest/gtest.h b/googletest/include/gtest/gtest.h
index 2ad5a0cb..57201123 100644
--- a/googletest/include/gtest/gtest.h
+++ b/googletest/include/gtest/gtest.h
@@ -2110,9 +2110,14 @@ GTEST_API_ AssertionResult DoubleLE(const char* expr1, const char* expr2,
 // of the dummy variable name, thus allowing multiple SCOPED_TRACE()s
 // to appear in the same block - as long as they are on different
 // lines.
+//
+// Assuming that each thread maintains its own stack of traces.
+// Therefore, a SCOPED_TRACE() would (correctly) only affect the
+// assertions in its own thread.
 #define SCOPED_TRACE(message) \
   ::testing::internal::ScopedTrace GTEST_CONCAT_TOKEN_(gtest_trace_, __LINE__)(\
-    __FILE__, __LINE__, ::testing::Message() << (message))
+    __FILE__, __LINE__, (message))
+
 
 // Compile-time assertion for type equality.
 // StaticAssertTypeEq<type1, type2>() compiles iff type1 and type2 are
diff --git a/googletest/include/gtest/internal/custom/gtest-port.h b/googletest/include/gtest/internal/custom/gtest-port.h
index c85f5d58..94884c15 100644
--- a/googletest/include/gtest/internal/custom/gtest-port.h
+++ b/googletest/include/gtest/internal/custom/gtest-port.h
@@ -61,6 +61,9 @@
 //     GTEST_EXCLUSIVE_LOCK_REQUIRED_(locks)
 //     GTEST_LOCK_EXCLUDED_(locks)
 //
+//   Underlying library support features:
+//     GTEST_HAS_CXXABI_H_
+//
 //   Exporting API symbols:
 //     GTEST_API_ - Specifier for exported symbols.
 //
diff --git a/googletest/include/gtest/internal/custom/gtest.h b/googletest/include/gtest/internal/custom/gtest.h
index a7a1c0b7..6f7c5e40 100644
--- a/googletest/include/gtest/internal/custom/gtest.h
+++ b/googletest/include/gtest/internal/custom/gtest.h
@@ -36,7 +36,7 @@
 // GTEST_CUSTOM_TEMPDIR_FUNCTION_ - An override for testing::TempDir().
 //                                  See testing::TempDir for semantics and
 //                                  signature.
-// 
+//
 // ** Custom implementation starts here **
 
 #ifndef GTEST_INCLUDE_GTEST_INTERNAL_CUSTOM_GTEST_H_
diff --git a/googletest/include/gtest/internal/gtest-death-test-internal.h b/googletest/include/gtest/internal/gtest-death-test-internal.h
index 2b3a78f5..a9e66106 100644
--- a/googletest/include/gtest/internal/gtest-death-test-internal.h
+++ b/googletest/include/gtest/internal/gtest-death-test-internal.h
@@ -27,7 +27,6 @@
 // (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
 // OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 //
-// Authors: wan@google.com (Zhanyong Wan), eefacm@gmail.com (Sean Mcafee)
 //
 // The Google C++ Testing Framework (Google Test)
 //
@@ -264,53 +263,6 @@ class InternalRunDeathTestFlag {
 // the flag is specified; otherwise returns NULL.
 InternalRunDeathTestFlag* ParseInternalRunDeathTestFlag();
 
-#else  // GTEST_HAS_DEATH_TEST
-
-// This macro is used for implementing macros such as
-// EXPECT_DEATH_IF_SUPPORTED and ASSERT_DEATH_IF_SUPPORTED on systems where
-// death tests are not supported. Those macros must compile on such systems
-// iff EXPECT_DEATH and ASSERT_DEATH compile with the same parameters on
-// systems that support death tests. This allows one to write such a macro
-// on a system that does not support death tests and be sure that it will
-// compile on a death-test supporting system.
-//
-// Parameters:
-//   statement -  A statement that a macro such as EXPECT_DEATH would test
-//                for program termination. This macro has to make sure this
-//                statement is compiled but not executed, to ensure that
-//                EXPECT_DEATH_IF_SUPPORTED compiles with a certain
-//                parameter iff EXPECT_DEATH compiles with it.
-//   regex     -  A regex that a macro such as EXPECT_DEATH would use to test
-//                the output of statement.  This parameter has to be
-//                compiled but not evaluated by this macro, to ensure that
-//                this macro only accepts expressions that a macro such as
-//                EXPECT_DEATH would accept.
-//   terminator - Must be an empty statement for EXPECT_DEATH_IF_SUPPORTED
-//                and a return statement for ASSERT_DEATH_IF_SUPPORTED.
-//                This ensures that ASSERT_DEATH_IF_SUPPORTED will not
-//                compile inside functions where ASSERT_DEATH doesn't
-//                compile.
-//
-//  The branch that has an always false condition is used to ensure that
-//  statement and regex are compiled (and thus syntactically correct) but
-//  never executed. The unreachable code macro protects the terminator
-//  statement from generating an 'unreachable code' warning in case
-//  statement unconditionally returns or throws. The Message constructor at
-//  the end allows the syntax of streaming additional messages into the
-//  macro, for compilational compatibility with EXPECT_DEATH/ASSERT_DEATH.
-# define GTEST_UNSUPPORTED_DEATH_TEST_(statement, regex, terminator) \
-    GTEST_AMBIGUOUS_ELSE_BLOCKER_ \
-    if (::testing::internal::AlwaysTrue()) { \
-      GTEST_LOG_(WARNING) \
-          << "Death tests are not supported on this platform.\n" \
-          << "Statement '" #statement "' cannot be verified."; \
-    } else if (::testing::internal::AlwaysFalse()) { \
-      ::testing::internal::RE::PartialMatch(".*", (regex)); \
-      GTEST_SUPPRESS_UNREACHABLE_CODE_WARNING_BELOW_(statement); \
-      terminator; \
-    } else \
-      ::testing::Message()
-
 #endif  // GTEST_HAS_DEATH_TEST
 
 }  // namespace internal
diff --git a/googletest/include/gtest/internal/gtest-filepath.h b/googletest/include/gtest/internal/gtest-filepath.h
index 7a13b4b0..406597a4 100644
--- a/googletest/include/gtest/internal/gtest-filepath.h
+++ b/googletest/include/gtest/internal/gtest-filepath.h
@@ -27,14 +27,13 @@
 // (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
 // OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 //
-// Author: keith.ray@gmail.com (Keith Ray)
 //
 // Google Test filepath utilities
 //
 // This header file declares classes and functions used internally by
 // Google Test.  They are subject to change without notice.
 //
-// This file is #included in <gtest/internal/gtest-internal.h>.
+// This file is #included in gtest/internal/gtest-internal.h.
 // Do not include this header file separately!
 
 #ifndef GTEST_INCLUDE_GTEST_INTERNAL_GTEST_FILEPATH_H_
diff --git a/googletest/include/gtest/internal/gtest-internal.h b/googletest/include/gtest/internal/gtest-internal.h
index 2a6e4dad..88f94c4a 100644
--- a/googletest/include/gtest/internal/gtest-internal.h
+++ b/googletest/include/gtest/internal/gtest-internal.h
@@ -27,7 +27,6 @@
 // (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
 // OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 //
-// Authors: wan@google.com (Zhanyong Wan), eefacm@gmail.com (Sean Mcafee)
 //
 // The Google C++ Testing Framework (Google Test)
 //
@@ -61,8 +60,8 @@
 #include <vector>
 
 #include "gtest/gtest-message.h"
-#include "gtest/internal/gtest-string.h"
 #include "gtest/internal/gtest-filepath.h"
+#include "gtest/internal/gtest-string.h"
 #include "gtest/internal/gtest-type-util.h"
 
 // Due to C++ preprocessor weirdness, we need double indirection to
@@ -157,7 +156,28 @@ class GTEST_API_ ScopedTrace {
  public:
   // The c'tor pushes the given source file location and message onto
   // a trace stack maintained by Google Test.
-  ScopedTrace(const char* file, int line, const Message& message);
+
+  // Template version. Uses Message() to convert the values into strings.
+  // Slow, but flexible.
+  template <typename T>
+  ScopedTrace(const char* file, int line, const T& message) {
+    PushTrace(file, line, (Message() << message).GetString());
+  }
+
+  // Optimize for some known types.
+  ScopedTrace(const char* file, int line, const char* message) {
+    PushTrace(file, line, message ? message : "(null)");
+  }
+
+#if GTEST_HAS_GLOBAL_STRING
+  ScopedTrace(const char* file, int line, const ::string& message) {
+    PushTrace(file, line, message);
+  }
+#endif
+
+  ScopedTrace(const char* file, int line, const std::string& message) {
+    PushTrace(file, line, message);
+  }
 
   // The d'tor pops the info pushed by the c'tor.
   //
@@ -166,6 +186,8 @@ class GTEST_API_ ScopedTrace {
   ~ScopedTrace();
 
  private:
+  void PushTrace(const char* file, int line, std::string message);
+
   GTEST_DISALLOW_COPY_AND_ASSIGN_(ScopedTrace);
 } GTEST_ATTRIBUTE_UNUSED_;  // A ScopedTrace object does its job in its
                             // c'tor and d'tor.  Therefore it doesn't
@@ -175,7 +197,7 @@ namespace edit_distance {
 // Returns the optimal edits to go from 'left' to 'right'.
 // All edits cost the same, with replace having lower priority than
 // add/remove.
-// Simple implementation of the Wagner-Fischer algorithm.
+// Simple implementation of the Wagner–Fischer algorithm.
 // See http://en.wikipedia.org/wiki/Wagner-Fischer_algorithm
 enum EditType { kMatch, kAdd, kRemove, kReplace };
 GTEST_API_ std::vector<EditType> CalculateOptimalEdits(
@@ -628,7 +650,7 @@ class TypeParameterizedTest {
   // Types).  Valid values for 'index' are [0, N - 1] where N is the
   // length of Types.
   static bool Register(const char* prefix,
-                       CodeLocation code_location,
+                       const CodeLocation& code_location,
                        const char* case_name, const char* test_names,
                        int index) {
     typedef typename Types::Head Type;
@@ -659,7 +681,7 @@ class TypeParameterizedTest {
 template <GTEST_TEMPLATE_ Fixture, class TestSel>
 class TypeParameterizedTest<Fixture, TestSel, Types0> {
  public:
-  static bool Register(const char* /*prefix*/, CodeLocation,
+  static bool Register(const char* /*prefix*/, const CodeLocation&,
                        const char* /*case_name*/, const char* /*test_names*/,
                        int /*index*/) {
     return true;
@@ -705,7 +727,7 @@ class TypeParameterizedTestCase {
 template <GTEST_TEMPLATE_ Fixture, typename Types>
 class TypeParameterizedTestCase<Fixture, Templates0, Types> {
  public:
-  static bool Register(const char* /*prefix*/, CodeLocation,
+  static bool Register(const char* /*prefix*/, const CodeLocation&,
                        const TypedTestCasePState* /*state*/,
                        const char* /*case_name*/, const char* /*test_names*/) {
     return true;
diff --git a/googletest/include/gtest/internal/gtest-param-util-generated.h b/googletest/include/gtest/internal/gtest-param-util-generated.h
index 34bd0ddf..dcf90c27 100644
--- a/googletest/include/gtest/internal/gtest-param-util-generated.h
+++ b/googletest/include/gtest/internal/gtest-param-util-generated.h
@@ -3203,7 +3203,7 @@ class CartesianProductGenerator2
     virtual ParamIteratorInterface<ParamType>* Clone() const {
       return new Iterator(*this);
     }
-    virtual const ParamType* Current() const { return &current_value_; }
+    virtual const ParamType* Current() const { return current_value_.get(); }
     virtual bool Equals(const ParamIteratorInterface<ParamType>& other) const {
       // Having the same base generator guarantees that the other
       // iterator is of the same type and we can downcast.
@@ -3235,7 +3235,7 @@ class CartesianProductGenerator2
 
     void ComputeCurrentValue() {
       if (!AtEnd())
-        current_value_ = ParamType(*current1_, *current2_);
+        current_value_.reset(new ParamType(*current1_, *current2_));
     }
     bool AtEnd() const {
       // We must report iterator past the end of the range when either of the
@@ -3257,7 +3257,7 @@ class CartesianProductGenerator2
     const typename ParamGenerator<T2>::iterator begin2_;
     const typename ParamGenerator<T2>::iterator end2_;
     typename ParamGenerator<T2>::iterator current2_;
-    ParamType current_value_;
+    linked_ptr<ParamType> current_value_;
   };  // class CartesianProductGenerator2::Iterator
 
   // No implementation - assignment is unsupported.
@@ -3326,7 +3326,7 @@ class CartesianProductGenerator3
     virtual ParamIteratorInterface<ParamType>* Clone() const {
       return new Iterator(*this);
     }
-    virtual const ParamType* Current() const { return &current_value_; }
+    virtual const ParamType* Current() const { return current_value_.get(); }
     virtual bool Equals(const ParamIteratorInterface<ParamType>& other) const {
       // Having the same base generator guarantees that the other
       // iterator is of the same type and we can downcast.
@@ -3362,7 +3362,7 @@ class CartesianProductGenerator3
 
     void ComputeCurrentValue() {
       if (!AtEnd())
-        current_value_ = ParamType(*current1_, *current2_, *current3_);
+        current_value_.reset(new ParamType(*current1_, *current2_, *current3_));
     }
     bool AtEnd() const {
       // We must report iterator past the end of the range when either of the
@@ -3388,7 +3388,7 @@ class CartesianProductGenerator3
     const typename ParamGenerator<T3>::iterator begin3_;
     const typename ParamGenerator<T3>::iterator end3_;
     typename ParamGenerator<T3>::iterator current3_;
-    ParamType current_value_;
+    linked_ptr<ParamType> current_value_;
   };  // class CartesianProductGenerator3::Iterator
 
   // No implementation - assignment is unsupported.
@@ -3467,7 +3467,7 @@ class CartesianProductGenerator4
     virtual ParamIteratorInterface<ParamType>* Clone() const {
       return new Iterator(*this);
     }
-    virtual const ParamType* Current() const { return &current_value_; }
+    virtual const ParamType* Current() const { return current_value_.get(); }
     virtual bool Equals(const ParamIteratorInterface<ParamType>& other) const {
       // Having the same base generator guarantees that the other
       // iterator is of the same type and we can downcast.
@@ -3507,8 +3507,8 @@ class CartesianProductGenerator4
 
     void ComputeCurrentValue() {
       if (!AtEnd())
-        current_value_ = ParamType(*current1_, *current2_, *current3_,
-            *current4_);
+        current_value_.reset(new ParamType(*current1_, *current2_, *current3_,
+            *current4_));
     }
     bool AtEnd() const {
       // We must report iterator past the end of the range when either of the
@@ -3538,7 +3538,7 @@ class CartesianProductGenerator4
     const typename ParamGenerator<T4>::iterator begin4_;
     const typename ParamGenerator<T4>::iterator end4_;
     typename ParamGenerator<T4>::iterator current4_;
-    ParamType current_value_;
+    linked_ptr<ParamType> current_value_;
   };  // class CartesianProductGenerator4::Iterator
 
   // No implementation - assignment is unsupported.
@@ -3625,7 +3625,7 @@ class CartesianProductGenerator5
     virtual ParamIteratorInterface<ParamType>* Clone() const {
       return new Iterator(*this);
     }
-    virtual const ParamType* Current() const { return &current_value_; }
+    virtual const ParamType* Current() const { return current_value_.get(); }
     virtual bool Equals(const ParamIteratorInterface<ParamType>& other) const {
       // Having the same base generator guarantees that the other
       // iterator is of the same type and we can downcast.
@@ -3669,8 +3669,8 @@ class CartesianProductGenerator5
 
     void ComputeCurrentValue() {
       if (!AtEnd())
-        current_value_ = ParamType(*current1_, *current2_, *current3_,
-            *current4_, *current5_);
+        current_value_.reset(new ParamType(*current1_, *current2_, *current3_,
+            *current4_, *current5_));
     }
     bool AtEnd() const {
       // We must report iterator past the end of the range when either of the
@@ -3704,7 +3704,7 @@ class CartesianProductGenerator5
     const typename ParamGenerator<T5>::iterator begin5_;
     const typename ParamGenerator<T5>::iterator end5_;
     typename ParamGenerator<T5>::iterator current5_;
-    ParamType current_value_;
+    linked_ptr<ParamType> current_value_;
   };  // class CartesianProductGenerator5::Iterator
 
   // No implementation - assignment is unsupported.
@@ -3802,7 +3802,7 @@ class CartesianProductGenerator6
     virtual ParamIteratorInterface<ParamType>* Clone() const {
       return new Iterator(*this);
     }
-    virtual const ParamType* Current() const { return &current_value_; }
+    virtual const ParamType* Current() const { return current_value_.get(); }
     virtual bool Equals(const ParamIteratorInterface<ParamType>& other) const {
       // Having the same base generator guarantees that the other
       // iterator is of the same type and we can downcast.
@@ -3850,8 +3850,8 @@ class CartesianProductGenerator6
 
     void ComputeCurrentValue() {
       if (!AtEnd())
-        current_value_ = ParamType(*current1_, *current2_, *current3_,
-            *current4_, *current5_, *current6_);
+        current_value_.reset(new ParamType(*current1_, *current2_, *current3_,
+            *current4_, *current5_, *current6_));
     }
     bool AtEnd() const {
       // We must report iterator past the end of the range when either of the
@@ -3889,7 +3889,7 @@ class CartesianProductGenerator6
     const typename ParamGenerator<T6>::iterator begin6_;
     const typename ParamGenerator<T6>::iterator end6_;
     typename ParamGenerator<T6>::iterator current6_;
-    ParamType current_value_;
+    linked_ptr<ParamType> current_value_;
   };  // class CartesianProductGenerator6::Iterator
 
   // No implementation - assignment is unsupported.
@@ -3996,7 +3996,7 @@ class CartesianProductGenerator7
     virtual ParamIteratorInterface<ParamType>* Clone() const {
       return new Iterator(*this);
     }
-    virtual const ParamType* Current() const { return &current_value_; }
+    virtual const ParamType* Current() const { return current_value_.get(); }
     virtual bool Equals(const ParamIteratorInterface<ParamType>& other) const {
       // Having the same base generator guarantees that the other
       // iterator is of the same type and we can downcast.
@@ -4048,8 +4048,8 @@ class CartesianProductGenerator7
 
     void ComputeCurrentValue() {
       if (!AtEnd())
-        current_value_ = ParamType(*current1_, *current2_, *current3_,
-            *current4_, *current5_, *current6_, *current7_);
+        current_value_.reset(new ParamType(*current1_, *current2_, *current3_,
+            *current4_, *current5_, *current6_, *current7_));
     }
     bool AtEnd() const {
       // We must report iterator past the end of the range when either of the
@@ -4091,7 +4091,7 @@ class CartesianProductGenerator7
     const typename ParamGenerator<T7>::iterator begin7_;
     const typename ParamGenerator<T7>::iterator end7_;
     typename ParamGenerator<T7>::iterator current7_;
-    ParamType current_value_;
+    linked_ptr<ParamType> current_value_;
   };  // class CartesianProductGenerator7::Iterator
 
   // No implementation - assignment is unsupported.
@@ -4209,7 +4209,7 @@ class CartesianProductGenerator8
     virtual ParamIteratorInterface<ParamType>* Clone() const {
       return new Iterator(*this);
     }
-    virtual const ParamType* Current() const { return &current_value_; }
+    virtual const ParamType* Current() const { return current_value_.get(); }
     virtual bool Equals(const ParamIteratorInterface<ParamType>& other) const {
       // Having the same base generator guarantees that the other
       // iterator is of the same type and we can downcast.
@@ -4265,8 +4265,8 @@ class CartesianProductGenerator8
 
     void ComputeCurrentValue() {
       if (!AtEnd())
-        current_value_ = ParamType(*current1_, *current2_, *current3_,
-            *current4_, *current5_, *current6_, *current7_, *current8_);
+        current_value_.reset(new ParamType(*current1_, *current2_, *current3_,
+            *current4_, *current5_, *current6_, *current7_, *current8_));
     }
     bool AtEnd() const {
       // We must report iterator past the end of the range when either of the
@@ -4312,7 +4312,7 @@ class CartesianProductGenerator8
     const typename ParamGenerator<T8>::iterator begin8_;
     const typename ParamGenerator<T8>::iterator end8_;
     typename ParamGenerator<T8>::iterator current8_;
-    ParamType current_value_;
+    linked_ptr<ParamType> current_value_;
   };  // class CartesianProductGenerator8::Iterator
 
   // No implementation - assignment is unsupported.
@@ -4438,7 +4438,7 @@ class CartesianProductGenerator9
     virtual ParamIteratorInterface<ParamType>* Clone() const {
       return new Iterator(*this);
     }
-    virtual const ParamType* Current() const { return &current_value_; }
+    virtual const ParamType* Current() const { return current_value_.get(); }
     virtual bool Equals(const ParamIteratorInterface<ParamType>& other) const {
       // Having the same base generator guarantees that the other
       // iterator is of the same type and we can downcast.
@@ -4498,9 +4498,9 @@ class CartesianProductGenerator9
 
     void ComputeCurrentValue() {
       if (!AtEnd())
-        current_value_ = ParamType(*current1_, *current2_, *current3_,
+        current_value_.reset(new ParamType(*current1_, *current2_, *current3_,
             *current4_, *current5_, *current6_, *current7_, *current8_,
-            *current9_);
+            *current9_));
     }
     bool AtEnd() const {
       // We must report iterator past the end of the range when either of the
@@ -4550,7 +4550,7 @@ class CartesianProductGenerator9
     const typename ParamGenerator<T9>::iterator begin9_;
     const typename ParamGenerator<T9>::iterator end9_;
     typename ParamGenerator<T9>::iterator current9_;
-    ParamType current_value_;
+    linked_ptr<ParamType> current_value_;
   };  // class CartesianProductGenerator9::Iterator
 
   // No implementation - assignment is unsupported.
@@ -4685,7 +4685,7 @@ class CartesianProductGenerator10
     virtual ParamIteratorInterface<ParamType>* Clone() const {
       return new Iterator(*this);
     }
-    virtual const ParamType* Current() const { return &current_value_; }
+    virtual const ParamType* Current() const { return current_value_.get(); }
     virtual bool Equals(const ParamIteratorInterface<ParamType>& other) const {
       // Having the same base generator guarantees that the other
       // iterator is of the same type and we can downcast.
@@ -4749,9 +4749,9 @@ class CartesianProductGenerator10
 
     void ComputeCurrentValue() {
       if (!AtEnd())
-        current_value_ = ParamType(*current1_, *current2_, *current3_,
+        current_value_.reset(new ParamType(*current1_, *current2_, *current3_,
             *current4_, *current5_, *current6_, *current7_, *current8_,
-            *current9_, *current10_);
+            *current9_, *current10_));
     }
     bool AtEnd() const {
       // We must report iterator past the end of the range when either of the
@@ -4805,7 +4805,7 @@ class CartesianProductGenerator10
     const typename ParamGenerator<T10>::iterator begin10_;
     const typename ParamGenerator<T10>::iterator end10_;
     typename ParamGenerator<T10>::iterator current10_;
-    ParamType current_value_;
+    linked_ptr<ParamType> current_value_;
   };  // class CartesianProductGenerator10::Iterator
 
   // No implementation - assignment is unsupported.
diff --git a/googletest/include/gtest/internal/gtest-param-util-generated.h.pump b/googletest/include/gtest/internal/gtest-param-util-generated.h.pump
index 7fcf4ce8..d65086a0 100644
--- a/googletest/include/gtest/internal/gtest-param-util-generated.h.pump
+++ b/googletest/include/gtest/internal/gtest-param-util-generated.h.pump
@@ -160,7 +160,7 @@ $for k [[
     virtual ParamIteratorInterface<ParamType>* Clone() const {
       return new Iterator(*this);
     }
-    virtual const ParamType* Current() const { return &current_value_; }
+    virtual const ParamType* Current() const { return current_value_.get(); }
     virtual bool Equals(const ParamIteratorInterface<ParamType>& other) const {
       // Having the same base generator guarantees that the other
       // iterator is of the same type and we can downcast.
@@ -192,7 +192,7 @@ $for k [[
 
     void ComputeCurrentValue() {
       if (!AtEnd())
-        current_value_ = ParamType($for j, [[*current$(j)_]]);
+        current_value_.reset(new ParamType($for j, [[*current$(j)_]]));
     }
     bool AtEnd() const {
       // We must report iterator past the end of the range when either of the
@@ -217,7 +217,7 @@ $for j [[
     typename ParamGenerator<T$j>::iterator current$(j)_;
 ]]
 
-    ParamType current_value_;
+    linked_ptr<ParamType> current_value_;
   };  // class CartesianProductGenerator$i::Iterator
 
   // No implementation - assignment is unsupported.
diff --git a/googletest/include/gtest/internal/gtest-string.h b/googletest/include/gtest/internal/gtest-string.h
index 97f1a7fd..04b9e7b3 100644
--- a/googletest/include/gtest/internal/gtest-string.h
+++ b/googletest/include/gtest/internal/gtest-string.h
@@ -27,7 +27,6 @@
 // (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
 // OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 //
-// Authors: wan@google.com (Zhanyong Wan), eefacm@gmail.com (Sean Mcafee)
 //
 // The Google C++ Testing Framework (Google Test)
 //
@@ -35,7 +34,8 @@
 // Google Test.  They are subject to change without notice. They should not used
 // by code external to Google Test.
 //
-// This header file is #included by <gtest/internal/gtest-internal.h>.
+// This header file is #included by
+// gtest/internal/gtest-internal.h.
 // It should not be #included by other files.
 
 #ifndef GTEST_INCLUDE_GTEST_INTERNAL_GTEST_STRING_H_
diff --git a/googletest/src/gtest-filepath.cc b/googletest/src/gtest-filepath.cc
index 0292dc11..a1fc0e37 100644
--- a/googletest/src/gtest-filepath.cc
+++ b/googletest/src/gtest-filepath.cc
@@ -26,14 +26,12 @@
 // THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
 // (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
 // OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
-//
-// Authors: keith.ray@gmail.com (Keith Ray)
 
-#include "gtest/gtest-message.h"
 #include "gtest/internal/gtest-filepath.h"
-#include "gtest/internal/gtest-port.h"
 
 #include <stdlib.h>
+#include "gtest/internal/gtest-port.h"
+#include "gtest/gtest-message.h"
 
 #if GTEST_OS_WINDOWS_MOBILE
 # include <windows.h>
@@ -48,6 +46,8 @@
 # include <climits>  // Some Linux distributions define PATH_MAX here.
 #endif  // GTEST_OS_WINDOWS_MOBILE
 
+#include "gtest/internal/gtest-string.h"
+
 #if GTEST_OS_WINDOWS
 # define GTEST_PATH_MAX_ _MAX_PATH
 #elif defined(PATH_MAX)
@@ -58,8 +58,6 @@
 # define GTEST_PATH_MAX_ _POSIX_PATH_MAX
 #endif  // GTEST_OS_WINDOWS
 
-#include "gtest/internal/gtest-string.h"
-
 namespace testing {
 namespace internal {
 
diff --git a/googletest/src/gtest.cc b/googletest/src/gtest.cc
index 42f04844..0aeeb8e7 100644
--- a/googletest/src/gtest.cc
+++ b/googletest/src/gtest.cc
@@ -3839,12 +3839,11 @@ void StreamingListener::SocketWriter::MakeConnection() {
 
 // Pushes the given source file location and message onto a per-thread
 // trace stack maintained by Google Test.
-ScopedTrace::ScopedTrace(const char* file, int line, const Message& message)
-    GTEST_LOCK_EXCLUDED_(&UnitTest::mutex_) {
+void ScopedTrace::PushTrace(const char* file, int line, std::string message) {
   TraceInfo trace;
   trace.file = file;
   trace.line = line;
-  trace.message = message.GetString();
+  trace.message.swap(message);
 
   UnitTest::GetInstance()->PushGTestTrace(trace);
 }
diff --git a/googletest/test/gtest-param-test2_test.cc b/googletest/test/gtest-param-test2_test.cc
index 0c09b27e..fdea1254 100644
--- a/googletest/test/gtest-param-test2_test.cc
+++ b/googletest/test/gtest-param-test2_test.cc
@@ -33,7 +33,6 @@
 // Google Test work.
 
 #include "gtest/gtest.h"
-
 #include "test/gtest-param-test_test.h"
 
 using ::testing::Values;
diff --git a/googletest/test/gtest-printers_test.cc b/googletest/test/gtest-printers_test.cc
index 2a6c017e..70ac9c55 100644
--- a/googletest/test/gtest-printers_test.cc
+++ b/googletest/test/gtest-printers_test.cc
@@ -52,13 +52,13 @@
 
 // hash_map and hash_set are available under Visual C++, or on Linux.
 #if GTEST_HAS_UNORDERED_MAP_
-# include <unordered_map>       // NOLINT
+# include <unordered_map>  // NOLINT
 #elif GTEST_HAS_HASH_MAP_
 # include <hash_map>            // NOLINT
 #endif  // GTEST_HAS_HASH_MAP_
 
 #if GTEST_HAS_UNORDERED_SET_
-# include <unordered_set>       // NOLINT
+# include <unordered_set>  // NOLINT
 #elif GTEST_HAS_HASH_SET_
 # include <hash_set>            // NOLINT
 #endif  // GTEST_HAS_HASH_SET_
@@ -192,13 +192,12 @@ inline ::std::ostream& operator<<(::std::ostream& os,
   return os << "StreamableTemplateInFoo: " << x.value();
 }
 
-// A user-defined streamable but recursivly-defined container type in 
+// A user-defined streamable but recursivly-defined container type in
 // a user namespace, it mimics therefore std::filesystem::path or
 // boost::filesystem::path.
 class PathLike {
  public:
-  struct iterator
-  {
+  struct iterator {
     typedef PathLike value_type;
   };
   typedef iterator const_iterator;
@@ -208,9 +207,7 @@ class PathLike {
   iterator begin() const { return iterator(); }
   iterator end() const { return iterator(); }
 
-  friend 
-  ::std::ostream& operator<<(::std::ostream& os, const PathLike&)
-  {
+  friend ::std::ostream& operator<<(::std::ostream& os, const PathLike&) {
     return os << "Streamable-PathLike";
   }
 };
@@ -250,9 +247,9 @@ using ::testing::internal::string;
 #if GTEST_HAS_UNORDERED_MAP_
 
 #define GTEST_HAS_HASH_MAP_ 1
-template<class Key, class T>
+template <class Key, class T>
 using hash_map = ::std::unordered_map<Key, T>;
-template<class Key, class T>
+template <class Key, class T>
 using hash_multimap = ::std::unordered_multimap<Key, T>;
 
 #elif GTEST_HAS_HASH_MAP_
@@ -270,9 +267,9 @@ using ::stdext::hash_multimap;
 #if GTEST_HAS_UNORDERED_SET_
 
 #define GTEST_HAS_HASH_SET_ 1
-template<class Key>
+template <class Key>
 using hash_set = ::std::unordered_set<Key>;
-template<class Key>
+template <class Key>
 using hash_multiset = ::std::unordered_multiset<Key>;
 
 #elif GTEST_HAS_HASH_SET_
@@ -1092,7 +1089,7 @@ TEST(PrintTr1TupleTest, VariousSizes) {
   ::std::tr1::tuple<bool, char, short, testing::internal::Int32,  // NOLINT
                     testing::internal::Int64, float, double, const char*, void*,
                     std::string>
-      t10(false, 'a', static_cast<short>(3), 4, 5, 1.5F, -2.5, str, 
+      t10(false, 'a', static_cast<short>(3), 4, 5, 1.5F, -2.5, str,  // NOLINT
           ImplicitCast_<void*>(NULL), "10");
   EXPECT_EQ("(false, 'a' (97, 0x61), 3, 4, 5, 1.5, -2.5, " + PrintPointer(str) +
             " pointing to \"8\", NULL, \"10\")",
@@ -1152,7 +1149,7 @@ TEST(PrintStdTupleTest, VariousSizes) {
   ::std::tuple<bool, char, short, testing::internal::Int32,  // NOLINT
                testing::internal::Int64, float, double, const char*, void*,
                std::string>
-      t10(false, 'a', static_cast<short>(3), 4, 5, 1.5F, -2.5, str,
+      t10(false, 'a', static_cast<short>(3), 4, 5, 1.5F, -2.5, str,  // NOLINT
           ImplicitCast_<void*>(NULL), "10");
   EXPECT_EQ("(false, 'a' (97, 0x61), 3, 4, 5, 1.5, -2.5, " + PrintPointer(str) +
             " pointing to \"8\", NULL, \"10\")",
diff --git a/googletest/test/production.cc b/googletest/test/production.cc
index 8b8a40b4..006bb970 100644
--- a/googletest/test/production.cc
+++ b/googletest/test/production.cc
@@ -29,7 +29,7 @@
 //
 // Author: wan@google.com (Zhanyong Wan)
 //
-// This is part of the unit test for include/gtest/gtest_prod.h.
+// This is part of the unit test for gtest_prod.h.
 
 #include "production.h"
 
diff --git a/googletest/test/production.h b/googletest/test/production.h
index 98fd5e47..0f01d83e 100644
--- a/googletest/test/production.h
+++ b/googletest/test/production.h
@@ -29,7 +29,7 @@
 //
 // Author: wan@google.com (Zhanyong Wan)
 //
-// This is part of the unit test for include/gtest/gtest_prod.h.
+// This is part of the unit test for gtest_prod.h.
 
 #ifndef GTEST_TEST_PRODUCTION_H_
 #define GTEST_TEST_PRODUCTION_H_