1 files changed, 16 insertions, 0 deletions
diff --git a/Lib/test/test_subprocess.py b/Lib/test/test_subprocess.py
index 4a563b9..78e7a0e 100644
--- a/Lib/test/test_subprocess.py
+++ b/Lib/test/test_subprocess.py
@@ -675,6 +675,22 @@ class ProcessTestCase(BaseTestCase):
         time.sleep(2)
         p.communicate(b"x" * 2**20)
 
+    def test_communicate_eintr(self):
+        # Issue #12493: communicate() should handle EINTR
+        def handler(signum, frame):
+            pass
+        old_handler = signal.signal(signal.SIGALRM, handler)
+        self.addCleanup(signal.signal, signal.SIGALRM, old_handler)
+
+        # the process is running for 2 seconds
+        args = [sys.executable, "-c", 'import time; time.sleep(2)']
+        for stream in ('stdout', 'stderr'):
+            kw = {stream: subprocess.PIPE}
+            with subprocess.Popen(args, **kw) as process:
+                signal.alarm(1)
+                # communicate() will be interrupted by SIGALRM
+                process.communicate()
+
 
 # context manager
 class _SuppressCoreFiles(object):