/ 
perl-5.40.2
⭐ Starred 2013
/ ext/B/t/optree_constants.t
Security Advisories (1)
CVE-2025-40909 (2025-05-30)

Perl threads have a working directory race condition where file operations may target unintended paths. If a directory handle is open at thread creation, the process-wide current working directory is temporarily changed in order to clone that handle for the new thread, which is visible from any third (or more) thread already running. This may lead to unintended operations such as loading code or accessing files from unexpected locations, which a local attacker may be able to exploit. The bug was introduced in commit 11a11ecf4bea72b17d250cfb43c897be1341861e and released in Perl version 5.13.6

Optimized constant subs are stored as bare scalars in the stash (package hash), which formerly held only GVs (typeglobs).

But you cant create them manually - you cant assign a scalar to a stash element, and expect it to work like a constant-sub, even if you provide a prototype.

This is a feature; alternative is too much action-at-a-distance. The following test demonstrates - napier is not seen as a function at all, much less an optimized one.

1 POD Error

The following errors were encountered while parsing the POD:

Around line 387:

Unknown directive: =head