Use CRATE_HIR_ID and CRATE_DEF_ID for obligations from foreign crates

Author: spastorino

compiler/rustc_trait_selection/src/traits/coherence.rs

@@ -16,7 +16,8 @@ use crate::traits::{
 };
 use rustc_data_structures::fx::FxIndexSet;
 use rustc_errors::Diagnostic;
-use rustc_hir::def_id::{DefId, LOCAL_CRATE};
+use rustc_hir::def_id::{DefId, CRATE_DEF_ID, LOCAL_CRATE};
+use rustc_hir::CRATE_HIR_ID;
 use rustc_infer::infer::{InferCtxt, TyCtxtInferExt};
 use rustc_infer::traits::util;
 use rustc_middle::traits::specialization_graph::OverlapMode;
@@ -395,19 +396,20 @@ fn resolve_negative_obligation<'cx, 'tcx>(
         return false;
     }
 
-    let outlives_env = if let Some(body_def_id) = body_def_id.as_local() {
-        let body_id = tcx.hir().local_def_id_to_hir_id(body_def_id);
-        let ocx = ObligationCtxt::new(&infcx);
-        let wf_tys = ocx.assumed_wf_types(param_env, DUMMY_SP, body_def_id);
-        OutlivesEnvironment::with_bounds(
-            param_env,
-            Some(&infcx),
-            infcx.implied_bounds_tys(param_env, body_id, wf_tys),
-        )
+    let (body_id, body_def_id) = if let Some(body_def_id) = body_def_id.as_local() {
+        (tcx.hir().local_def_id_to_hir_id(body_def_id), body_def_id)
     } else {
-        OutlivesEnvironment::new(param_env)
+        (CRATE_HIR_ID, CRATE_DEF_ID)
     };
 
+    let ocx = ObligationCtxt::new(&infcx);
+    let wf_tys = ocx.assumed_wf_types(param_env, DUMMY_SP, body_def_id);
+    let outlives_env = OutlivesEnvironment::with_bounds(
+        param_env,
+        Some(&infcx),
+        infcx.implied_bounds_tys(param_env, body_id, wf_tys),
+    );
+
     infcx.process_registered_region_obligations(outlives_env.region_bound_pairs(), param_env);
 
     infcx.resolve_regions(&outlives_env).is_empty()