platform.libc_ver() raises TypeError on a threaded libc without a version
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Description
Bug report
platform.libc_ver() raises TypeError when it scans a binary that references
a threaded C library (such as libc_r) with no version number:
>>> platform.libc_ver(executable=some_binary_referencing_libc_r_so)
Traceback (most recent call last):
...
TypeError: 'NoneType' object is not subscriptable
In the so branch of the scanning loop, when a match has a thread suffix
(_r/_pthread) but no version, ver is still None and gets subscripted.
This is a regression from gh-90548 (PR #131313), so 3.14 and later are affected.
CPython versions tested on:
3.16 (main)
Operating systems tested on:
Linux, macOS
Linked PRs
- gh-155455
Contributor guide
First steps
- Read the whole issue, then the project's contributing guide.
- Comment on the issue to say you are picking it up — it saves two people doing the same work.
- Fork the repository and make your change on a branch.
- Open a pull request that references the issue number.
Research direction
Start with platform.libc_ver() and its so branch in the scanning loop, then review linked PR gh-155455 before making changes. Reproduce the case with a binary referencing a threaded C library without a version, and consider the issue resolved when the call no longer raises the reported TypeError.
Written by the indexing model from the issue text.
Assessment
- Tech stack
- python
- Domain
- operating-systems
- Issue type
- Bug
- Difficulty
- 2/5
- Estimated time
- 1-3 hours
- Activity status
- Stale
- Clarity
- Clearly specified
- Newbie friendliness
- 30/100