review

Author: lcnr

Diff for: compiler/rustc_borrowck/src/diagnostics/conflict_errors.rs

@@ -707,7 +707,9 @@ impl<'infcx, 'tcx> MirBorrowckCtxt<'_, 'infcx, 'tcx> {
             // Test the callee's predicates, substituting in `ref_ty` for the moved argument type.
             clauses.instantiate(tcx, new_args).predicates.iter().all(|&(mut clause)| {
                 // Normalize before testing to see through type aliases and projections.
-                if let Ok(normalized) = tcx.try_normalize_erasing_regions(self.param_env, clause) {
+                if let Ok(normalized) =
+                    tcx.try_normalize_erasing_regions(self.infcx.typing_env(self.param_env), clause)
+                {
                     clause = normalized;
                 }
                 self.infcx.predicate_must_hold_modulo_regions(&Obligation::new(

Diff for: compiler/rustc_hir_analysis/src/check/wfcheck.rs

@@ -1126,7 +1126,7 @@ fn check_type_defn<'tcx>(
                     let ty = tcx.type_of(variant.tail().did).instantiate_identity();
                     let ty = tcx.erase_regions(ty);
                     assert!(!ty.has_infer());
-                    ty.needs_drop(tcx, ty::TypingEnv::non_body_analysis(tcx, item.owner_id.def_id))
+                    ty.needs_drop(tcx, wfcx.infcx.typing_env(wfcx.param_env))
                 }
             };
             // All fields (except for possibly the last) should be sized.

Diff for: compiler/rustc_infer/src/infer/mod.rs

@@ -1286,7 +1286,7 @@ impl<'tcx> InferCtxt<'tcx> {
         u
     }
 
-    /// Extract [ty::TypingMode] of this inference context to get a `TypingEnv`
+    /// Extract [`ty::TypingMode`] of this inference context to get a `TypingEnv`
     /// which contains the necessary information to use the trait system without
     /// using canonicalization or carrying this inference context around.
     pub fn typing_env(&self, param_env: ty::ParamEnv<'tcx>) -> ty::TypingEnv<'tcx> {
@@ -1304,8 +1304,8 @@ impl<'tcx> InferCtxt<'tcx> {
         ty::TypingEnv { typing_mode, param_env }
     }
 
-    /// Similar to [Self::canonicalize_query], except that it returns
-    /// a [PseudoCanonicalInput] and requires both the `value` and the
+    /// Similar to [`Self::canonicalize_query`], except that it returns
+    /// a [`PseudoCanonicalInput`] and requires both the `value` and the
     /// `param_env` to not contain any inference variables or placeholders.
     pub fn pseudo_canonicalize_query<V>(
         &self,

Diff for: compiler/rustc_middle/src/ty/mod.rs

@@ -1197,7 +1197,8 @@ impl<'tcx> TypingEnv<'tcx> {
         // as these placeholders are also local to the current inference context. However, we
         // currently use pseudo-canonical queries in the trait solver which replaces params with
         // placeholders. We should also simply not use pseudo-canonical queries in the trait
-        // solver, at which point we can readd this assert.
+        // solver, at which point we can readd this assert. As of writing this comment, this is
+        // only used by `fn layout_is_pointer_like` when calling `layout_of`.
         //
         // debug_assert!(!value.has_placeholders());
         PseudoCanonicalInput { typing_env: self, value }

Diff for: compiler/rustc_mir_build/src/build/expr/as_rvalue.rs

@@ -227,6 +227,8 @@ impl<'a, 'tcx> Builder<'a, 'tcx> {
                             if range.start <= range.end { BinOp::BitAnd } else { BinOp::BitOr };
 
                         let mut comparer = |range: u128, bin_op: BinOp| -> Place<'tcx> {
+                            // We can use `ty::TypingEnv::fully_monomorphized()`` here
+                            // as we only need it to compute the layout of a primitive.
                             let range_val = Const::from_bits(
                                 this.tcx,
                                 range,