Fix out of bounds access in unsafeCodePointAt0Fallback#112
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garyb merged 2 commits intopurescript:masterfrom Nov 11, 2018
Merged
Fix out of bounds access in unsafeCodePointAt0Fallback#112garyb merged 2 commits intopurescript:masterfrom
unsafeCodePointAt0Fallback#112garyb merged 2 commits intopurescript:masterfrom
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`unsafeCodePointAt0Fallback` crashed when passed a string of length 1 due to always accessing index 1.
michaelficarra
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Nov 10, 2018
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michaelficarra
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Very nice. Great catch, and thanks for the testing idea.
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The precondition for
unsafeCodePointAt0is that the string length in code units is at least 1. But the fallback version only worked for length > 2, because it always accessed index 1.This was not caught by the test suite, because fallbacks are not used in node.js. I added a second test run to the test script that forces the use of fallbacks.