Access Session while decoding expn_id.

Author: cjgillot

compiler/rustc_metadata/src/rmeta/decoder.rs

@@ -1623,7 +1623,7 @@ impl<'a, 'tcx> CrateMetadataRef<'a> {
         self.def_path_hash_map.def_path_hash_to_def_index(&hash)
     }
 
-    fn expn_hash_to_expn_id(&self, index_guess: u32, hash: ExpnHash) -> ExpnId {
+    fn expn_hash_to_expn_id(&self, sess: &Session, index_guess: u32, hash: ExpnHash) -> ExpnId {
         debug_assert_eq!(ExpnId::from_hash(hash), None);
         let index_guess = ExpnIndex::from_u32(index_guess);
         let old_hash = self.root.expn_hashes.get(self, index_guess).map(|lazy| lazy.decode(self));
@@ -1654,7 +1654,7 @@ impl<'a, 'tcx> CrateMetadataRef<'a> {
             map[&hash]
         };
 
-        let data = self.root.expn_data.get(self, index).unwrap().decode(self);
+        let data = self.root.expn_data.get(self, index).unwrap().decode((self, sess));
         rustc_span::hygiene::register_expn_id(self.cnum, index, data, hash)
     }
 

compiler/rustc_metadata/src/rmeta/decoder/cstore_impl.rs

@@ -507,7 +507,13 @@ impl CrateStore for CStore {
         DefId { krate: cnum, index: def_index }
     }
 
-    fn expn_hash_to_expn_id(&self, cnum: CrateNum, index_guess: u32, hash: ExpnHash) -> ExpnId {
-        self.get_crate_data(cnum).expn_hash_to_expn_id(index_guess, hash)
+    fn expn_hash_to_expn_id(
+        &self,
+        sess: &Session,
+        cnum: CrateNum,
+        index_guess: u32,
+        hash: ExpnHash,
+    ) -> ExpnId {
+        self.get_crate_data(cnum).expn_hash_to_expn_id(sess, index_guess, hash)
     }
 }

compiler/rustc_middle/src/middle/cstore.rs

@@ -9,6 +9,7 @@ use rustc_hir::definitions::{DefKey, DefPath, DefPathHash};
 use rustc_macros::HashStable;
 use rustc_session::search_paths::PathKind;
 use rustc_session::utils::NativeLibKind;
+use rustc_session::Session;
 use rustc_span::hygiene::{ExpnHash, ExpnId};
 use rustc_span::symbol::Symbol;
 use rustc_span::Span;
@@ -190,7 +191,13 @@ pub trait CrateStore: std::fmt::Debug {
 
     /// Fetch a DefId from a DefPathHash for a foreign crate.
     fn def_path_hash_to_def_id(&self, cnum: CrateNum, hash: DefPathHash) -> DefId;
-    fn expn_hash_to_expn_id(&self, cnum: CrateNum, index_guess: u32, hash: ExpnHash) -> ExpnId;
+    fn expn_hash_to_expn_id(
+        &self,
+        sess: &Session,
+        cnum: CrateNum,
+        index_guess: u32,
+        hash: ExpnHash,
+    ) -> ExpnId;
 }
 
 pub type CrateStoreDyn = dyn CrateStore + sync::Sync;

compiler/rustc_query_impl/src/on_disk_cache.rs

@@ -667,7 +667,12 @@ impl<'a, 'tcx> Decodable<CacheDecoder<'a, 'tcx>> for ExpnId {
             rustc_span::hygiene::register_local_expn_id(data, hash)
         } else {
             let index_guess = decoder.foreign_expn_data[&hash];
-            decoder.tcx.cstore_untracked().expn_hash_to_expn_id(krate, index_guess, hash)
+            decoder.tcx.cstore_untracked().expn_hash_to_expn_id(
+                decoder.tcx.sess,
+                krate,
+                index_guess,
+                hash,
+            )
         };
 
         #[cfg(debug_assertions)]