Add a test for redefining a macro name in the expansion of

the macro with the same name.  This often causes m4 to crash with
malloc.conf F/Freeguard though not reliably.
Crash found with the afl fuzzer.

1 files changed, 6 insertions, 0 deletions

diff --git a/regress/usr.bin/m4/redef2.m4 b/regress/usr.bin/m4/redef2.m4
new file mode 100644
index 00000000000..caff6cee224
--- /dev/null
+++ b/regress/usr.bin/m4/redef2.m4
@@ -0,0 +1,6 @@
+dnl $OpenBSD: redef2.m4,v 1.1 2014/12/07 14:32:34 jsg Exp $
+dnl recursive macro redefinition
+define(`A', `aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa')
+A(
+	define(`A', `bbbbbbbbbbbbbbbbbbb')
+)