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-rw-r--r--malloc/mtrace.c4
1 files changed, 3 insertions, 1 deletions
diff --git a/malloc/mtrace.c b/malloc/mtrace.c
index 4e6e1e5efb..a812dd10f8 100644
--- a/malloc/mtrace.c
+++ b/malloc/mtrace.c
@@ -1,5 +1,5 @@
/* More debugging hooks for `malloc'.
- Copyright (C) 1991,92,93,94,96,97,98,99 Free Software Foundation, Inc.
+ Copyright (C) 1991,92,93,94,96,97,98,99,2000 Free Software Foundation, Inc.
Written April 2, 1991 by John Gilmore of Cygnus Support.
Based on mcheck.c by Mike Haertel.
@@ -127,6 +127,8 @@ tr_freehook (ptr, caller)
__ptr_t ptr;
const __ptr_t caller;
{
+ if (ptr == NULL)
+ return;
__libc_lock_lock (lock);
tr_where (caller);
/* Be sure to print it first. */