Jessica McKellar added the comment:
Thanks for reporting this, palm.kevin, and thanks for the patch,
amaury.forgeotdarc.
First, just to be explicit here's a short reproducer:
import sys
sys.stdin = None
help(1)
(Note that to get to the isatty check you need to provide an argument and it
has to be something that has help, so `help()` and `help("a")` don't exercise
this code path)
Also, here is where sys.stdin can be set to None:
http://hg.python.org/cpython/file/dbceba88b96e/Python/pythonrun.c#l1201
The provided patch fixes the above test case; instead of erroring out with the
traceback in the original bug report, the plain pager is used and the help
message is printed to stdout.
Anyone on the nosy list interested in writing some tests?
----------
nosy: +jesstess
stage: patch review -> test needed
versions: +Python 3.5 -Python 3.2
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