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devdanzin/optimizer_symbols_null.md

Created March 18, 2026 10:07
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optimizer_symbols.c: make_bottom NULL deref when arena full
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optimizer_symbols_null.md

optimizer_symbols.c: make_bottom NULL deref when arena full

Summary

sym_new(ctx) at line 1535 can return NULL when the type arena is full. Result immediately dereferenced without check. Every other sym_new call site checks for NULL.

Fix

Add NULL check: if (sym == NULL) return out_of_space(ctx);

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