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Philipp Stephani authored
Issue found by Clang’s UBSan. * src/alloc.c (GC_STRING_OVERRUN_COOKIE_SIZE): Increase to 8. (string_overrun_cookie): Extend accordingly. (GC_STRING_EXTRA): Ensure that it’s properly aligned for ‘sdata’. (allocate_string_data): Verify that ‘sdata’ blocks remain aligned.
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