tree 7d357768824f6cb43a5cce3e0b2e054edec0b517
parent 28375572f6679b659bb2e8a6535b4b2101b4410e
author David Spickett <david.spickett@linaro.org> 1751961156 +0100
committer GitHub <noreply@github.com> 1751961156 +0100
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[flang] Avoid UB in CharBlock Compare to C string (#147329)

The behaviour of strncmp is undefined if either string pointer is null
(https://en.cppreference.com/w/cpp/string/byte/strncmp.html).

I've copied the logic over from Compare to another CharBlock, which had
code to avoid UB in memcmp.

The test Preprocessing/kind-suffix.F90 was failing with UBSAN enabled,
and now passes.