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-rw-r--r--common/test-compat.c1
1 files changed, 1 insertions, 0 deletions
diff --git a/common/test-compat.c b/common/test-compat.c
index 3af33ac..e28698e 100644
--- a/common/test-compat.c
+++ b/common/test-compat.c
@@ -117,6 +117,7 @@ test_mmap (void)
size_t size;
char file[] = "emptyfileXXXXXX";
int fd = mkstemp (file);
+ assert (fd >= 0);
close (fd);
/* mmap on empty file should work */
map = p11_mmap_open (file, NULL, &data, &size);