clang-format 15 (with 1.13.4) may sometimes fail to run Format Selection

[sean-mcmanus]

Repro code is

int a()
{
return 0;
}

// Doing Format Selection on the range of code below fails with clang-format 15 -- works with 14.
// The "matching" code above appears to trigger the bug. Format document works.
int b()
{
return 0;
}

The workaround is to set C_Cpp.clang_format_path to a clang-format 14 binary.

I'm not sure yet if it's a bug with clang-format itself or if there is some "by design" change that we may need to address ourselves.

[sean-mcmanus]

Seems like it might have the same root cause as llvm/llvm-project#58464 (that repro is also a clang 15 regression with formatting specific lines).

[sean-mcmanus]

It's a clang-format bug. I filed llvm/llvm-project#59178, although it might get closed as a duplicate of the other one.