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Clang-format eats all the memory when formatting minilzo.c #53888

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belkiss opened this issue Feb 16, 2022 · 4 comments
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Clang-format eats all the memory when formatting minilzo.c #53888

belkiss opened this issue Feb 16, 2022 · 4 comments
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clang-format confirmed Verified by a second party

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@belkiss
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belkiss commented Feb 16, 2022 •
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Heya!

As said in the title, when trying to format the file minilzo.c that can be download here: http://www.oberhumer.com/opensource/lzo/#minilzo, clang-format starts eating up the memory, and never completes...
@llvmbot
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llvmbot commented Feb 16, 2022

@llvm/issue-subscribers-clang-format

@mkurdej
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mkurdej commented Feb 16, 2022

Well, AFAIK, that's due to all the #ifs that clang-format processes branch by branch, every possible combination, which provokes exponential complexity :/.
To fix this, one probably needs to rework completely this part of clang-format...

BTW, the file lzodefs.h also takes ages and tons of memory. I haven't waited for it to end, but just taking about 200 lines (out of over 3200) takes over 6 seconds on my machine.

@mkurdej mkurdej added bug Indicates an unexpected problem or unintended behavior confirmed Verified by a second party labels Feb 16, 2022
@llvmbot
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llvmbot commented Feb 16, 2022

@llvm/issue-subscribers-bug

@owenca
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owenca commented Feb 23, 2022

This may be a duplicate of #48863.

@rymiel rymiel mentioned this issue Nov 20, 2022
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@lszl84 lszl84 mentioned this issue Nov 2, 2023
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@owenca owenca removed the bug Indicates an unexpected problem or unintended behavior label Dec 16, 2024
@owenca owenca closed this as completed May 4, 2025
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@belkiss @mkurdej @owenca @EugeneZelenko @llvmbot