| Issue |
130185
|
| Summary |
Can Len - 1 in HeaderMapImpl::getString overflow?
|
| Labels |
question
|
| Assignees |
|
| Reporter |
shafik
|
A static analysis tool flags `Len - 1` for possible overflow if `Len` has the value `0`:
https://github.com/llvm/llvm-project/blob/27c788de759472316169795fa06d592221ac602e/clang/lib/Lex/HeaderMap.cpp#L161
A naive reading of the code does seem to indeed lead one to believe that `MaxLen` and `Len` could both be zero. I can't really convince myself this can't happen but maybe there is a constraint I am missing that prevents this.
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