Adjust throw_validation_failure macro to shorten the use of `with_n…

…o_trimmed_paths`

compiler/rustc_mir/src/interpret/validity.rs

@@ -26,25 +26,22 @@ use super::{
 
 macro_rules! throw_validation_failure {
     ($where:expr, { $( $what_fmt:expr ),+ } $( expected { $( $expected_fmt:expr ),+ } )?) => {{
-        let (path, msg) = rustc_middle::ty::print::with_no_trimmed_paths(|| {
-            let mut msg = String::new();
-            msg.push_str("encountered ");
-            write!(&mut msg, $($what_fmt),+).unwrap();
-            $(
-                msg.push_str(", but expected ");
-                write!(&mut msg, $($expected_fmt),+).unwrap();
-            )?
-
+        let mut msg = String::new();
+        msg.push_str("encountered ");
+        write!(&mut msg, $($what_fmt),+).unwrap();
+        $(
+            msg.push_str(", but expected ");
+            write!(&mut msg, $($expected_fmt),+).unwrap();
+        )?
+        let path = rustc_middle::ty::print::with_no_trimmed_paths(|| {
             let where_ = &$where;
-            let path = if !where_.is_empty() {
+            if !where_.is_empty() {
                 let mut path = String::new();
                 write_path(&mut path, where_);
                 Some(path)
             } else {
                 None
-            };
-
-            (path, msg)
+            }
         });
         throw_ub!(ValidationFailure { path, msg })
     }};