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Top-level code not analyzed by -Wunsafe-buffer-usage #92664

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pkasting opened this issue May 18, 2024 · 0 comments
Open

Top-level code not analyzed by -Wunsafe-buffer-usage #92664

pkasting opened this issue May 18, 2024 · 0 comments
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clang:diagnostics New/improved warning or error message in Clang, but not in clang-tidy or static analyzer false-negative

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@pkasting
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In issue 92191 we discovered -Wunsafe-buffer-usage is apparently not run on top-level code. The following snippet demonstrates this.

int i = 0;
int* j = &i;
int* k1 = j - 1;  // No warning (bug)

void foo() {
  int* k2 = j - 1;  // Warning
}

Live repro: https://godbolt.org/z/x58vKoqje
@haoNoQ @jkorous-apple
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clang:diagnostics New/improved warning or error message in Clang, but not in clang-tidy or static analyzer false-negative
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@EugeneZelenko @pkasting