Add reproducer for #368

2 files changed, 31 insertions, 0 deletions

diff --git a/testsuite/gna/issue368/bug.vhdl b/testsuite/gna/issue368/bug.vhdl
new file mode 100644
index 000000000..9a02d7f2c
--- /dev/null
+++ b/testsuite/gna/issue368/bug.vhdl
@@ -0,0 +1,21 @@
+entity bug is
+end entity bug;
+
+architecture bug of bug is
+  signal uninitialized_real:real; -- yea--this is poor coding practice
+begin
+  process
+    begin
+      report "bug="&real'image(uninitialized_real); -- prints out initial value -1.797693134862316e308
+      
+      wait for 1 ns;
+      
+      uninitialized_real<=2.0*uninitialized_real; -- result is apparently IEEE Inf
+      wait for 0 ns; -- delta cycle to let new value take.
+      
+      report "bug="&real'image(uninitialized_real); -- this line never completes
+      -- gets stuck in an infinite loop in grt.vstrings.to_string.  Relevant source file: grt-vstrings.adb
+      -- Apparent reason for infinite loop--routine cannot determine exponent because the argument is Inf.
+      wait;
+    end process;
+end architecture;
diff --git a/testsuite/gna/issue368/testsuite.sh b/testsuite/gna/issue368/testsuite.sh
new file mode 100755
index 000000000..8e2a7272f
--- /dev/null
+++ b/testsuite/gna/issue368/testsuite.sh
@@ -0,0 +1,10 @@
+#! /bin/sh
+
+. ../../testenv.sh
+
+analyze bug.vhdl
+elab_simulate_failure bug
+
+clean
+
+echo "Test successful"