2 files changed, 41 insertions, 0 deletions
diff --git a/testsuite/gna/issue1979/repro.vhdl b/testsuite/gna/issue1979/repro.vhdl
new file mode 100644
index 000000000..012279b1f
--- /dev/null
+++ b/testsuite/gna/issue1979/repro.vhdl
@@ -0,0 +1,31 @@
+package repro_pkg is
+  function "<" (a, b : natural) return bit;
+end repro_pkg;
+
+package body repro_pkg is
+  function "<" (a, b : natural) return bit is
+  begin
+    if boolean'(a < b) then
+      return '1';
+    else
+      return '0';
+    end if;
+  end "<";
+end repro_pkg;
+
+use work.repro_pkg.all;
+entity repro is
+end;
+
+architecture behav of repro is
+  signal n1, n2 : natural;
+begin
+  --  No crash: this is a vhdl expression.
+  --  assert n1 < n2;
+
+  --  No crash: this is an 'or' property
+  --  assert n1 < n2 or n2 < n1;
+
+  --  Crash: this is a vhdl expression
+  assert (n1 < n2) or (n2 < n1);
+end;
diff --git a/testsuite/gna/issue1979/testsuite.sh b/testsuite/gna/issue1979/testsuite.sh
new file mode 100755
index 000000000..7b37332aa
--- /dev/null
+++ b/testsuite/gna/issue1979/testsuite.sh
@@ -0,0 +1,10 @@
+#! /bin/sh
+
+. ../../testenv.sh
+
+export GHDL_STD_FLAGS=--std=08
+analyze repro.vhdl
+
+clean
+
+echo "Test successful"