fix: VFS should not walk circular symlinks #17093
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As of rust-lang#6246, rust-analyzer follows symlinks. This can introduce an infinite loop if symlinks point to parent directories. Considering that rust-lang#6246 was added in 2020 without many bug reports, this is clearly a rare occurrence. However, I am observing rust-analyzer hang on projects that have symlinks of the form: ``` test/a_symlink -> ../../ ``` Ignore symlinks that only point to the parent directories, as this is more robust but still allows typical symlink usage patterns.
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As of #6246, rust-analyzer follows symlinks. This can introduce an infinite loop if symlinks point to parent directories.
Considering that #6246 was added in 2020 without many bug reports, this is clearly a rare occurrence. However, I am observing rust-analyzer hang on projects that have symlinks of the form:
Ignore symlinks that only point to the parent directories, as this is more robust but still allows typical symlink usage patterns.