Fix #79986: str_ireplace bug with diacritics characters #6007
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`tolower()` returns an `int`, so we must not convert to `char` which may be `signed` and as such may be subject to overflow (actually, implementation defined behavior).
nikic
approved these changes
Aug 24, 2020
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tolower()returns anint, so we must not convert tocharwhichmay be
signedand as such may be subject to overflow (actually,implementation defined behavior).