On 15/03/2021 20:54, Luke Benes wrote:
The recently added Unit Test test_tdf131000 https://cgit.freedesktop.org/libreoffice/core/commit/?id=df33714f0eca fails with clang 12 but not with gcc 10 or clang 11. I bisected this regression to this change in clang: https://github.com/llvm/llvm-project/commit/69cd776e1ee79e72ccbdad30749eac04579715ee [CodeGen] Apply 'nonnull' and 'dereferenceable(N)' to 'this' pointer Does this look like undefined behavior on our end or a bug in clang? The build log is below:
Interesting. I can't reproduce that UITest_calc_tests9 SEGV with any of my Clang 13 trunk builds (which also include the above LLVM commit), but they're all --enable-dbgutil (and thus implicitly --disable-optimized), while your build is presumably (implicitly) --enable-optimized?
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