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Nonexistent offset detection on lists with count() -1 #14215

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Nonexistent offset detection on lists with count() -1#14215
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bug
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Easy fixes

Description

@staabm
staabm
opened on Mar 1, 2026

Bug report

we sometimes get false positives for array access after conditions with count() - 1.

similar to phpstan/phpstan-src#5090

Code snippet that reproduces the problem

https://phpstan.org/r/6db0cf5d-3b20-48ea-ad8b-e457de8d311a

Expected output

as indicated in comments of the playground link

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Activity

  1. staabm
    added this to the Easy fixes milestone on Mar 1, 2026
  2. staabm
    added
    bug
    on Mar 1, 2026
  3. phpstan-bot
    added a commit that references this issue on Mar 1, 2026

    Fix phpstan/phpstan#14215: Nonexistent offset detection on lists with…

    1cb72b1

  4. phpstan-bot commented on Mar 6, 2026

    @phpstan-bot
    phpstan-bot
    on Mar 6, 2026
    Contributor

    Closed via merging phpstan/phpstan-src#5137

  5. phpstan-bot
    closed this as completedon Mar 6, 2026

  6. github-actions commented on Apr 7, 2026

    @github-actions
    github-actionsBot
    on Apr 7, 2026 – with GitHub Actions

    This thread has been automatically locked since there has not been any recent activity after it was closed. Please open a new issue for related bugs.

  7. github-actions
    locked as resolved and limited conversation to collaborators on Apr 7, 2026
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