System.FilePath.parent did not return the correct parent path in the case of absolute file paths Example of previous behavior ``` (FilePath.mk "/foo").parent -> some (FilePath.mk "") (System.FilePath.mk "/").parent -> some (FilePath.mk "") ``` The new behavior is based on rust's std::path::Path::parent function (as previously described in comment in System.FilePath) Example of updated behavior ``` (System.FilePath.mk "/foo").parent -> some (FilePath.mk "/") (System.FilePath.mk "/").parent -> none ``` Behavior for relative file paths is unchanged Closes #3618 |
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