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Originaly reported here: https://bugzilla.redhat.com/show_bug.cgi?id=1160640
I've forgotten to add the sort value to the -s option of cProfile which results in a traceback instead of user friendly error message. In the example below hello.py just prints a "Hello World":
$ python -m cProfile -s hello.py
Traceback (most recent call last):
 File "/usr/lib64/python2.6/runpy.py", line 122, in _run_module_as_main
 "__main__", fname, loader, pkg_name)
 File "/usr/lib64/python2.6/runpy.py", line 34, in _run_code
 exec code in run_globals
 File "/usr/lib64/python2.6/cProfile.py", line 190, in <module>
 main()
 File "/usr/lib64/python2.6/cProfile.py", line 185, in main
 parser.print_usage()
 File "/usr/lib64/python2.6/optparse.py", line 1597, in print_usage
 print >>file, self.get_usage()
 File "/usr/lib64/python2.6/optparse.py", line 1583, in get_usage
 self.expand_prog_name(self.usage))
 File "/usr/lib64/python2.6/optparse.py", line 1560, in expand_prog_name
 return s.replace("%prog", self.get_prog_name())
 File "/usr/lib64/python2.6/optparse.py", line 1555, in get_prog_name
 return os.path.basename(sys.argv[0])
IndexError: list index out of range
Tested with python2.7, python3.4 with the same result.
Attached patch adds `choices` for sort option of cProfile.
> $ python -m cProfile -s sdds.py 
Usage: cProfile.py [-o output_file_path] [-s sort] scriptfile [arg] ...
cProfile.py: error: option -s: invalid choice: 'sdds.py' (choose from 'cumulative', 'module', 'ncalls', 'pcalls', 'file', 'line', 'name', 'calls', 'stdname', 'nfl', 'filename', 'cumtime', 'time', 'tottime')

Any info regarding that? Patch seems good and it actually works.

Patch looks good to me, but we need a test case.

If we can solve #30118 for argument unittest, and apply #18971 for optparse to argparse, this issue will then can be solve, too.

Hi,
Just used the content of the patch and apply it on master,
Add a unittest and the blurb entry.

New changeset fcd5e84a515e19409840c570730f0728e9fcfc83 by Victor Stinner (Stéphane Wirtel) in branch 'master':
 bpo-23420: Verify the value of '-s' when execute the CLI of cProfile (GH-9925)
https://github.com/python/cpython/commit/fcd5e84a515e19409840c570730f0728e9fcfc83

New changeset 657e3f9a2c0d620807dd81882d566ad8f1ae423e by Miss Islington (bot) (Stéphane Wirtel) in branch '3.7':
[3.7] bpo-23420: Verify the value of '-s' when execute the CLI of cProfile (GH-9925) (GH-9926)
https://github.com/python/cpython/commit/657e3f9a2c0d620807dd81882d566ad8f1ae423e

New changeset 669fa8b6376ee8703ae4383536dfcc0e96e51b78 by Victor Stinner (Stéphane Wirtel) in branch '3.6':
[3.6] bpo-23420: Verify the value of '-s' when execute the CLI of cProfile (GH-9925) (GH-9927)
https://github.com/python/cpython/commit/669fa8b6376ee8703ae4383536dfcc0e96e51b78

New changeset 6e57382464101d2669a425622e19fff57586b2ff by Miss Islington (bot) (Stéphane Wirtel) in branch '2.7':
[2.7] bpo-23420: Verify the value of '-s' when execute the CLI of cProfile (GH-9925) (GH-9928)
https://github.com/python/cpython/commit/6e57382464101d2669a425622e19fff57586b2ff

Thanks Robert Kuska for the bug report and the initial patch, thanks Stéphane Wirtel for the PR (with the NEWS entry and the new test ;-))

welcome