Fix rustdoc ICE on bad typedef with mismatching types

diff --git a/src/librustdoc/clean/mod.rs b/src/librustdoc/clean/mod.rs
index 8f4099653562e040b9d753563f9de583fad8fbc5..3253c3ae87c72b9949384fac8effba60916b1e8e 100644 (file)
--- a/src/librustdoc/clean/mod.rs
+++ b/src/librustdoc/clean/mod.rs
@@ -1853,7 +1853,7 @@ pub(crate) fn clean_middle_ty<'tcx>(
         ty::Placeholder(..) => panic!("Placeholder"),
         ty::GeneratorWitness(..) => panic!("GeneratorWitness"),
         ty::Infer(..) => panic!("Infer"),
-        ty::Error(_) => panic!("Error"),
+        ty::Error(_) => rustc_errors::FatalError.raise(),
     }
 }