1 files changed, 11 insertions, 0 deletions
diff --git a/compiler/rustc_middle/src/mir/pretty.rs b/compiler/rustc_middle/src/mir/pretty.rs
index 15bd5c08965..d81a9772a09 100644
--- a/compiler/rustc_middle/src/mir/pretty.rs
+++ b/compiler/rustc_middle/src/mir/pretty.rs
@@ -187,6 +187,17 @@ fn dump_path<'tcx>(
             }));
             s
         }
+        ty::InstanceDef::AsyncDropGlueCtorShim(_, ty) => {
+            // Unfortunately, pretty-printed typed are not very filename-friendly.
+            // We dome some filtering.
+            let mut s = ".".to_owned();
+            s.extend(ty.to_string().chars().filter_map(|c| match c {
+                ' ' => None,
+                ':' | '<' | '>' => Some('_'),
+                c => Some(c),
+            }));
+            s
+        }
         _ => String::new(),
     };