fix InterpCx resolve

Author: lcnr

compiler/rustc_mir/src/interpret/eval_context.rs

@@ -482,13 +482,13 @@ impl<'mir, 'tcx: 'mir, M: Machine<'mir, 'tcx>> InterpCx<'mir, 'tcx, M> {
     /// The `substs` are assumed to already be in our interpreter "universe" (param_env).
     pub(super) fn resolve(
         &self,
-        def_id: DefId,
+        def: ty::WithOptConstParam<DefId>,
         substs: SubstsRef<'tcx>,
     ) -> InterpResult<'tcx, ty::Instance<'tcx>> {
-        trace!("resolve: {:?}, {:#?}", def_id, substs);
+        trace!("resolve: {:?}, {:#?}", def, substs);
         trace!("param_env: {:#?}", self.param_env);
         trace!("substs: {:#?}", substs);
-        match ty::Instance::resolve(*self.tcx, self.param_env, def_id, substs) {
+        match ty::Instance::resolve_opt_const_arg(*self.tcx, self.param_env, def, substs) {
             Ok(Some(instance)) => Ok(instance),
             Ok(None) => throw_inval!(TooGeneric),
 

compiler/rustc_mir/src/interpret/operand.rs

@@ -552,7 +552,7 @@ impl<'mir, 'tcx: 'mir, M: Machine<'mir, 'tcx>> InterpCx<'mir, 'tcx, M> {
             ty::ConstKind::Param(_) => throw_inval!(TooGeneric),
             ty::ConstKind::Error(_) => throw_inval!(TypeckError(ErrorReported)),
             ty::ConstKind::Unevaluated(def, substs, promoted) => {
-                let instance = self.resolve(def.did, substs)?;
+                let instance = self.resolve(def, substs)?;
                 return Ok(self.eval_to_allocation(GlobalId { instance, promoted })?.into());
             }
             ty::ConstKind::Infer(..)

compiler/rustc_mir/src/interpret/terminator.rs

@@ -64,7 +64,12 @@ impl<'mir, 'tcx: 'mir, M: Machine<'mir, 'tcx>> InterpCx<'mir, 'tcx, M> {
                     }
                     ty::FnDef(def_id, substs) => {
                         let sig = func.layout.ty.fn_sig(*self.tcx);
-                        (FnVal::Instance(self.resolve(def_id, substs)?), sig.abi())
+                        (
+                            FnVal::Instance(
+                                self.resolve(ty::WithOptConstParam::unknown(def_id), substs)?,
+                            ),
+                            sig.abi(),
+                        )
                     }
                     _ => span_bug!(
                         terminator.source_info.span,