[gsubgpos] Guard integer arithmetic against wrapping below zero #4934
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@khaledhosny Is Circle just mad that I opened this PR from my fork instead of the org repo? |
May be you didn’t give it the required permissions on your personal account? |
When either casting a signed integer to an unsigned one or subtracting a value from an unsigned one, add assertions to verify we will not end up below expected bounds.
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When either casting a signed integer to an unsigned one or subtracting a value from an unsigned one, add assertions to verify we will not end up below expected bounds.
This tracks the extra assertions added to Rustybuzz in harfbuzz/rustybuzz#146 subsequent to having found a bogus type casting in the Rust port via harfbuzz/rustybuzz#142.