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-rwxr-xr-xutil/testrunner/sanitizer-testrunner.py2
1 files changed, 1 insertions, 1 deletions
diff --git a/util/testrunner/sanitizer-testrunner.py b/util/testrunner/sanitizer-testrunner.py
index d1f0310d16..bd9bb0f1ab 100755
--- a/util/testrunner/sanitizer-testrunner.py
+++ b/util/testrunner/sanitizer-testrunner.py
@@ -32,7 +32,7 @@ issues_detected = False
for line in f:
if proc:
# We don't want the stderr of the subprocess to disappear, so print it.
- print(line, file=sys.stderr, end="")
+ print(line, file=sys.stderr, end="", flush=True)
if detect_ASAN.match(line):
issues_detected = True
f.close()