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-rw-r--r--Lib/test/script_helper.py12
1 files changed, 10 insertions, 2 deletions
diff --git a/Lib/test/script_helper.py b/Lib/test/script_helper.py
index af0545b..5559349 100644
--- a/Lib/test/script_helper.py
+++ b/Lib/test/script_helper.py
@@ -78,7 +78,7 @@ def assert_python_failure(*args, **env_vars):
"""
return _assert_python(False, *args, **env_vars)
-def spawn_python(*args, **kw):
+def spawn_python(*args, stdout=subprocess.PIPE, stderr=subprocess.STDOUT, **kw):
"""Run a Python subprocess with the given arguments.
kw is extra keyword args to pass to subprocess.Popen. Returns a Popen
@@ -86,8 +86,16 @@ def spawn_python(*args, **kw):
"""
cmd_line = [sys.executable, '-E']
cmd_line.extend(args)
+ # Under Fedora (?), GNU readline can output junk on stderr when initialized,
+ # depending on the TERM setting. Setting TERM=vt100 is supposed to disable
+ # that. References:
+ # - http://reinout.vanrees.org/weblog/2009/08/14/readline-invisible-character-hack.html
+ # - http://stackoverflow.com/questions/15760712/python-readline-module-prints-escape-character-during-import
+ # - http://lists.gnu.org/archive/html/bug-readline/2007-08/msg00004.html
+ env = kw.setdefault('env', dict(os.environ))
+ env['TERM'] = 'vt100'
return subprocess.Popen(cmd_line, stdin=subprocess.PIPE,
- stdout=subprocess.PIPE, stderr=subprocess.STDOUT,
+ stdout=stdout, stderr=stderr,
**kw)
def kill_python(p):