Restore warning about local_path() and into_local_path() methods

Author: Urgau

compiler/rustc_span/src/lib.rs

@@ -374,6 +374,8 @@ impl RealFileName {
     /// if this information exists.
     ///
     /// May not exists if the filename was imported from another crate.
+    ///
+    /// Avoid embedding this in build artifacts; prefer `path()` or `embeddable_name()`.
     #[inline]
     pub fn local_path(&self) -> Option<&Path> {
         self.local.as_ref().map(|lp| lp.name.as_ref())
@@ -383,6 +385,8 @@ impl RealFileName {
     /// if this information exists.
     ///
     /// May not exists if the filename was imported from another crate.
+    ///
+    /// Avoid embedding this in build artifacts; prefer `path()` or `embeddable_name()`.
     #[inline]
     pub fn into_local_path(self) -> Option<PathBuf> {
         self.local.map(|lp| lp.name)