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Ignore invalid UTF-8 input in the BPE tokenizer #11729

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Merged
merged 1 commit into from
Feb 7, 2025
Merged

Ignore invalid UTF-8 input in the BPE tokenizer #11729

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9 changes: 8 additions & 1 deletion src/unicode.cpp
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Original file line number Diff line number Diff line change
Expand Up @@ -618,7 +618,14 @@ std::vector<uint32_t> unicode_cpts_from_utf8(const std::string & utf8) {
result.reserve(utf8.size());
size_t offset = 0;
while (offset < utf8.size()) {
result.push_back(unicode_cpt_from_utf8(utf8, offset));
try {
result.push_back(unicode_cpt_from_utf8(utf8, offset));
}
catch (const std::invalid_argument & /*ex*/) {
// Silently ignore invalid UTF-8 input to avoid leaking the exception beyond llama_tokenize
++offset;
result.emplace_back(0xFFFD); // replacement character
}
}
return result;
}
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