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Title: Fix Uncontrolled Recursion in `simplifyAddBracesToCommand` by emptyiscolor · Pull Request #8264 · cppcheck-opensource/cppcheck · GitHub

Open Graph Title: Fix Uncontrolled Recursion in `simplifyAddBracesToCommand` by emptyiscolor · Pull Request #8264 · cppcheck-opensource/cppcheck

X Title: Fix Uncontrolled Recursion in `simplifyAddBracesToCommand` by emptyiscolor · Pull Request #8264 · cppcheck-opensource/cppcheck

Description: Related case: https://sourceforge.net/p/cppcheck/discussion/development/thread/eea4fd963a/ Applied Fix — Recursion Depth Limit Added an int depth parameter (default 0) to both functions. Every recursive call passes depth + 1, and at the top of simplifyAddBracesToCommand we bail out when depth > 500: Test Both PoC vectors (100K else if chain and 50K nested if) no longer cause a stack overflow by running the PY code from the discussion. Normal code continues to be analyzed correctly. Alternative Fix — Iterative Approach The else if chain recursion (Path 1) can be eliminated by converting the tail-recursive call into a loop inside simplifyAddBracesToCommand. This eliminates Path 1 (else-if chain) with zero stack growth regardless of chain length. Path 2 (mutual recursion with simplifyAddBracesPair) would still need a depth limit or its own iterative conversion using an explicit stack/worklist. A full iterative conversion of both paths is a larger refactor but would make the code completely immune to stack overflow from any input shape.

Open Graph Description: Related case: https://sourceforge.net/p/cppcheck/discussion/development/thread/eea4fd963a/ Applied Fix — Recursion Depth Limit Added an int depth parameter (default 0) to both functions. Every recu...

X Description: Related case: https://sourceforge.net/p/cppcheck/discussion/development/thread/eea4fd963a/ Applied Fix — Recursion Depth Limit Added an int depth parameter (default 0) to both functions. Every recu...

Opengraph URL: https://github.com/cppcheck-opensource/cppcheck/pull/8264

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Fix Uncontrolled Recursion in simplifyAddBracesToCommand https://github.com/cppcheck-opensource/cppcheck/pull/8264/files#top
Show all changes 2 commits https://github.com/cppcheck-opensource/cppcheck/pull/8264/files
e28f7d6 Fix Uncontrolled Recursion in `simplifyAddBracesToCommand` / `simplif… emptyiscolor Feb 25, 2026 https://github.com/cppcheck-opensource/cppcheck/pull/8264/commits/e28f7d641cf3ee87cf2f123c9e411749a102dc77
d39fee4 Fix recursion depth with count-down depth pattern and add test cases. emptyiscolor Feb 25, 2026 https://github.com/cppcheck-opensource/cppcheck/pull/8264/commits/d39fee4db36eac05aada9f51864e46e34fc0eb5a
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