Document that CalledProcessError.returncode is the negative

signal number when the process died due to a signal.

diff --git a/Doc/library/subprocess.rst b/Doc/library/subprocess.rst
index 2ec94bfe138d5de607d5e55b0bc1d91195516d3f..67bee40acb68b20762bff3ee59fae0a029007b8c 100644 (file)
--- a/Doc/library/subprocess.rst
+++ b/Doc/library/subprocess.rst
@@ -188,7 +188,8 @@ compatibility with older versions, see the :ref:`call-function-trio` section.
 
     .. attribute:: returncode
 
-        Exit status of the child process.
+        Exit status of the child process.  If the process exited due to a
+        signal, this will be the negative signal number.
 
     .. attribute:: cmd