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0570cc568f
The problem was that the LevelIndentTracker remembered the indentation level of previous deeper levels when leaving a scope. Afterwards, when it entered again a deeper level, it blindly reused the previous indentation level. In case the --lines option was used such that the previous deeper level was not formatted, that previous level was whatever happened to be there in the source code. The formatter simply believed it. This is fixed by letting the LevelIndentTracker forget the previous deeper levels when stepping out of them (=> change in LevelIndentTracker::nextLine()). Note that this used to be the case until LLVM 14.0.6, but was changed in https://reviews.llvm.org/D129064 (#56352) to fix a crash. Our commit here essentially reverts that crash fix. It was incorrect/incomplete. Fixes #58464. Fixes #59178. Fixes #62799. Differential Revision: https://reviews.llvm.org/D151047