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Radar · Solidity · Archive · Week 28 · Jul 6 – 12, 2026

Unsound Spill In Mutual Recursion Bug

Worth knowingecosystem

What changed
The Yul optimizer’s call graph analysis misclassified mutually recursive functions as non‑recursive, causing them to be excluded from the memory spilling mechanism that is incompatible with recursion.
Production impact
The source does not say.
Try it
Compile mutually recursive Yul functions and observe whether the optimizer now includes them in the spill analysis.
Source
soliditylang.org/blog/2026/07/09/unsound-spill-in-mutual-recursion-bug

Written by gpt-oss-20b from the linked source · claims checked against the sources · archive, not individually reviewed