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-rw-r--r--src/libstd/fs.rs2
1 files changed, 2 insertions, 0 deletions
diff --git a/src/libstd/fs.rs b/src/libstd/fs.rs
index 5a05c61e064..0a19350851e 100644
--- a/src/libstd/fs.rs
+++ b/src/libstd/fs.rs
@@ -844,6 +844,8 @@ pub fn symlink_metadata<P: AsRef<Path>>(path: P) -> io::Result<Metadata> {
 
 /// Rename a file or directory to a new name.
 ///
+/// This will not work if the new name is on a different mount point.
+///
 /// # Errors
 ///
 /// This function will return an error if the provided `from` doesn't exist, if