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-rw-r--r--contrib/libexecinfo/backtrace.c2
1 files changed, 1 insertions, 1 deletions
diff --git a/contrib/libexecinfo/backtrace.c b/contrib/libexecinfo/backtrace.c
index 756a982..7dbf0bb 100644
--- a/contrib/libexecinfo/backtrace.c
+++ b/contrib/libexecinfo/backtrace.c
@@ -89,7 +89,7 @@ rasprintf(char **buf, size_t *bufsiz, size_t offs, const char *fmt, ...)
len = vsnprintf(*buf + offs, *bufsiz - offs, fmt, ap);
va_end(ap);
- if (len < 0 || (size_t)len < *bufsiz - offs)
+ if (len < 0 || (size_t)len + 1 < *bufsiz - offs)
return len;
nbufsiz = MAX(*bufsiz + 512, (size_t)len + 1);
} else
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