testsuite/synth: add a test for #1242

2 files changed, 29 insertions, 0 deletions

diff --git a/testsuite/synth/issue1242/issue.vhdl b/testsuite/synth/issue1242/issue.vhdl
new file mode 100644
index 000000000..afc5d3eae
--- /dev/null
+++ b/testsuite/synth/issue1242/issue.vhdl
@@ -0,0 +1,22 @@
+library ieee;
+use ieee.std_logic_1164.all;
+
+entity issue is
+    port (bar    :  in std_logic_vector (3 downto 0);
+          foobar : out std_logic);
+end issue;
+
+architecture beh of issue is
+    function foo (bar: std_logic_vector) return std_logic is
+        variable i : integer range 0 to 2 := 0;
+    begin
+        loop
+            exit when bar (i) = '0';
+            i := i + 1;
+        end loop;
+
+        return bar (i);
+    end function foo;
+begin
+    foobar <= foo (bar);
+end architecture;
diff --git a/testsuite/synth/issue1242/testsuite.sh b/testsuite/synth/issue1242/testsuite.sh
new file mode 100755
index 000000000..0eb271e62
--- /dev/null
+++ b/testsuite/synth/issue1242/testsuite.sh
@@ -0,0 +1,7 @@
+#! /bin/sh
+
+. ../../testenv.sh
+
+synth_failure issue.vhdl -e
+
+echo "Test successful"