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# T2 SDE: package/.../gawk/invalid-free.patch
# Copyright (C) 2004 - 2005 The T2 SDE Project
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If the pointer is not ours, we must not free it.

  - Rene Rebe <rene@exactcode.de>

--- gawk-3.1.5/io.c	2005-07-26 20:07:43.000000000 +0200
+++ gawk-3.1.5-fixed/io.c	2005-09-10 16:27:17.000000000 +0200
@@ -2480,9 +2480,12 @@
 {
 	struct stat sbuf;
 	struct open_hook *oh;
+	int need_free = 0;
 
-	if (iop == NULL)
+	if (iop == NULL) {
 		emalloc(iop, IOBUF *, sizeof(IOBUF), "iop_alloc");
+		need_free = 1;
+	}
 	memset(iop, '\0', sizeof(IOBUF));
 	iop->flag = 0;
 	iop->fd = fd;
@@ -2495,7 +2498,8 @@
 	}
 
 	if (iop->fd == INVALID_HANDLE) {
-		free(iop);
+		if (need_free)
+			free(iop);
 		return NULL;
 	}
 	if (isatty(iop->fd))