Explicitly disable buffering for stderr in tests

furszy · Nov 25, 2019 · a0771d1 · a0771d1
1 parent fb424fb
commit a0771d1
Showing 1 changed file with 3 additions and 0 deletions.
diff --git a/src/tests.c b/src/tests.c
@@ -5174,6 +5174,9 @@ int main(int argc, char **argv) {
      * diagnostic information. Happens right at the start of main because
      * setbuf must be used before any other operation on the stream. */
     setbuf(stdout, NULL);
+    /* Also disable buffering for stderr because it's not guaranteed that it's
+     * unbuffered on all systems. */
+    setbuf(stderr, NULL);
 
     /* find iteration count */
     if (argc > 1) {