X-Git-Url: https://git.lizzy.rs/?a=blobdiff_plain;f=compiler%2Frustc_mir%2Fsrc%2Ftransform%2Fcheck_unsafety.rs;h=103ddda1a1d262c45069da1fab78d78404a7776b;hb=cc77ba46fcb2d288aa01554b48cd586c5827c3dd;hp=955be8cc81e18285502b650f541130e7db5375b6;hpb=7bd62a8f5a4d6d740677aea03c37771258529922;p=rust.git

diff --git a/compiler/rustc_mir/src/transform/check_unsafety.rs b/compiler/rustc_mir/src/transform/check_unsafety.rs
index 955be8cc81e..103ddda1a1d 100644
--- a/compiler/rustc_mir/src/transform/check_unsafety.rs
+++ b/compiler/rustc_mir/src/transform/check_unsafety.rs
@@ -221,7 +221,7 @@ fn visit_place(&mut self, place: &Place<'tcx>, context: PlaceContext, _location:
             }
 
             let base_ty = base.ty(self.body, self.tcx).ty;
-            if base_ty.ty_adt_def().map_or(false, |adt| adt.is_union()) {
+            if base_ty.is_union() {
                 // If we did not hit a `Deref` yet and the overall place use is an assignment, the
                 // rules are different.
                 let assign_to_field = !saw_deref
@@ -376,6 +376,12 @@ fn check_mut_borrowing_layout_constrained_field(
     /// Checks whether calling `func_did` needs an `unsafe` context or not, i.e. whether
     /// the called function has target features the calling function hasn't.
     fn check_target_features(&mut self, func_did: DefId) {
+        // Unsafety isn't required on wasm targets. For more information see
+        // the corresponding check in typeck/src/collect.rs
+        if self.tcx.sess.target.options.is_like_wasm {
+            return;
+        }
+
         let callee_features = &self.tcx.codegen_fn_attrs(func_did).target_features;
         let self_features = &self.tcx.codegen_fn_attrs(self.body_did).target_features;