PR c++/71696 testcase.

Add libiberty/testsuite/demangle-expected testcase for:

	PR c++/71696
	* cplus-dem.c: Prevent infinite recursion when there is a cycle
	in the referencing of remembered mangled types.
	(work_stuff): New stack to keep track of the remembered mangled
	types that are currently being processed.
	(push_processed_type): New method to push currently processed
	remembered type onto the stack.
	(pop_processed_type): New method to pop currently processed
	remembered type from the stack.
	(work_stuff_copy_to_from): Copy values of new variables.
	(delete_non_B_K_work_stuff): Free stack memory.
	(demangle_args): Push/Pop currently processed remembered type.
	(do_type): Do not demangle a cyclic reference and push/pop
	referenced remembered type.

diff --git a/libiberty/testsuite/demangle-expected b/libiberty/testsuite/demangle-expected
index 535f2c1..a5a658a 100644 (file)
--- a/libiberty/testsuite/demangle-expected
+++ b/libiberty/testsuite/demangle-expected
@@ -4587,3 +4587,8 @@ _Z80800000000000000000000
 
 __t2m05B500000000000000000_
 __t2m05B500000000000000000_
+#
+# Tests stack overflow PR71696
+
+__10%0__S4_0T0T0
+%0<>::%0(%0<>)