Rollup merge of #93098 - Aaron1011:def-path-hash-debug, r=oli-obk

Show a more informative panic message when `DefPathHash` does not exist

This should hopefully make it easier to debug incremental compilation
bugs like #93096 without affecting performance.

compiler/rustc_middle/src/ty/context.rs

@@ -1308,7 +1308,7 @@ impl<'tcx> TyCtxt<'tcx> {
     /// Converts a `DefPathHash` to its corresponding `DefId` in the current compilation
     /// session, if it still exists. This is used during incremental compilation to
     /// turn a deserialized `DefPathHash` into its current `DefId`.
-    pub fn def_path_hash_to_def_id(self, hash: DefPathHash) -> DefId {
+    pub fn def_path_hash_to_def_id(self, hash: DefPathHash, err: &mut dyn FnMut() -> !) -> DefId {
         debug!("def_path_hash_to_def_id({:?})", hash);
 
         let stable_crate_id = hash.stable_crate_id();
@@ -1316,7 +1316,10 @@ impl<'tcx> TyCtxt<'tcx> {
         // If this is a DefPathHash from the local crate, we can look up the
         // DefId in the tcx's `Definitions`.
         if stable_crate_id == self.sess.local_stable_crate_id() {
-            self.untracked_resolutions.definitions.local_def_path_hash_to_def_id(hash).to_def_id()
+            self.untracked_resolutions
+                .definitions
+                .local_def_path_hash_to_def_id(hash, err)
+                .to_def_id()
         } else {
             // If this is a DefPathHash from an upstream crate, let the CrateStore map
             // it to a DefId.