Merge CrateDisambiguator into StableCrateId

compiler/rustc_middle/src/middle/cstore.rs

@@ -14,7 +14,7 @@ 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::CrateDisambiguator;
+use rustc_session::StableCrateId;
 use rustc_span::symbol::Symbol;
 use rustc_span::Span;
 use rustc_target::spec::Target;
@@ -200,7 +200,7 @@ pub trait CrateStore {
     // "queries" used in resolve that aren't tracked for incremental compilation
     fn crate_name_untracked(&self, cnum: CrateNum) -> Symbol;
     fn crate_is_private_dep_untracked(&self, cnum: CrateNum) -> bool;
-    fn crate_disambiguator_untracked(&self, cnum: CrateNum) -> CrateDisambiguator;
+    fn stable_crate_id_untracked(&self, cnum: CrateNum) -> StableCrateId;
     fn crate_hash_untracked(&self, cnum: CrateNum) -> Svh;
 
     // This is basically a 1-based range of ints, which is a little

compiler/rustc_middle/src/middle/exported_symbols.rs

@@ -48,8 +48,8 @@ impl<'tcx> ExportedSymbol<'tcx> {
 
 pub fn metadata_symbol_name(tcx: TyCtxt<'_>) -> String {
     format!(
-        "rust_metadata_{}_{}",
+        "rust_metadata_{}_{:08x}",
         tcx.original_crate_name(LOCAL_CRATE),
-        tcx.crate_disambiguator(LOCAL_CRATE).to_fingerprint().to_hex()
+        tcx.sess.local_stable_crate_id().to_u64(),
     )
 }