[clang-format] Avoid crash in LevelIndentTracker.

[curdeius]

Summary

Fixes https://github.com/llvm/llvm-project/issues/56352.

[MyDeveloperDay]

LGTM

[owenpan]

clang/lib/Format/UnwrappedLineFormatter.cpp

68–69

You can delete both lines as the body of the if statement is unreachable. (After the while loop on lines 62-63, IndentForLevel.size() is larger than Line.Level.)

[HazardyKnusperkeks]

clang/lib/Format/UnwrappedLineFormatter.cpp

62–69

So how about that?

[owenpan]

clang/lib/Format/UnwrappedLineFormatter.cpp

62–69

Good idea, but it's an unrelated change. Let's take care of it in D129105, which I will update to use resize() instead of insert().

[curdeius]

Address comments.