gh-156545: Fix flamegraph export RecursionError on deeply recursive programs - #156546
Merged
pablogsal merged 4 commits intoOct 5, 2026
Merged
Conversation
pablogsal
added
the
needs backport to 3.15
pablogsal
enabled auto-merge (squash)
October 5, 2026 14:06
pablogsal
approved these changes
Oct 5, 2026
pablogsal
removed
the
needs backport to 3.15
|
GH-158851 is a backport of this pull request to the 3.15 branch. |
pablogsal
added a commit
that referenced
this pull request
Oct 5, 2026
pablogsal
added a commit
to pablogsal/cpython
that referenced
this pull request
Oct 5, 2026
…on deeply recursive programs (pythonGH-156546) (python#158851)" This reverts commit 0ac7217.
This file contains hidden or bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
Sign up for free
to join this conversation on GitHub.
Already have an account?
Sign in to comment
2 participants
Add this suggestion to a batch that can be applied as a single commit.This suggestion is invalid because no changes were made to the code.Suggestions cannot be applied while the pull request is closed.Suggestions cannot be applied while viewing a subset of changes.Only one suggestion per line can be applied in a batch.Add this suggestion to a batch that can be applied as a single commit.Applying suggestions on deleted lines is not supported.You must change the existing code in this line in order to create a valid suggestion.Outdated suggestions cannot be applied.This suggestion has been applied or marked resolved.Suggestions cannot be applied from pending reviews.Suggestions cannot be applied on multi-line comments.Suggestions cannot be applied while the pull request is queued to merge.Suggestion cannot be applied right now. Please check back later.
Flamegraph export raises RecursionError when sampled stacks exceed the usual Python recursion limit. Temporarily allow enough recursion for the unwinder's 1,536-frame maximum during export, restoring the original limit in finally.
Tests cover a full 1,536-frame export and limit restoration after success, empty output, and an export error. The profiling test suite passes.
Closes #156545.