diff --git a/compiler/rustc_codegen_gcc/src/archive.rs b/compiler/rustc_codegen_gcc/src/archive.rs
index 14a69c194e4e..77fbb2c500e8 100644
--- a/compiler/rustc_codegen_gcc/src/archive.rs
+++ b/compiler/rustc_codegen_gcc/src/archive.rs
@@ -183,7 +183,7 @@ impl<'a> ArchiveBuilder<'a> for ArArchiveBuilder<'a> {
             std::process::Command::new("ranlib").arg(output).status().expect("Couldn't run ranlib");
 
         if !status.success() {
-            self.config.sess.emit_fatal(RanlibFailure { exit_code: status.code() });
+            self.config.sess.emit_fatal(RanlibFailure { exit_code: format!("{:?}", status.code()) });
         }
 
         any_members
diff --git a/compiler/rustc_codegen_gcc/src/errors.rs b/compiler/rustc_codegen_gcc/src/errors.rs
index 490a209ead05..01de75976a32 100644
--- a/compiler/rustc_codegen_gcc/src/errors.rs
+++ b/compiler/rustc_codegen_gcc/src/errors.rs
@@ -4,7 +4,7 @@ use rustc_span::Span;
 #[derive(SessionDiagnostic)]
 #[diag(codegen_gcc::ranlib_failure)]
 pub(crate) struct RanlibFailure {
-    pub exit_code: Option<i32>
+    pub exit_code: String,
 }
 
 #[derive(SessionDiagnostic)]
diff --git a/compiler/rustc_errors/src/diagnostic.rs b/compiler/rustc_errors/src/diagnostic.rs
index f6af0f879ca5..1c440a0a07ef 100644
--- a/compiler/rustc_errors/src/diagnostic.rs
+++ b/compiler/rustc_errors/src/diagnostic.rs
@@ -114,15 +114,6 @@ impl IntoDiagnosticArg for char {
     }
 }
 
-impl<T: IntoDiagnosticArg> IntoDiagnosticArg for Option<T> {
-    fn into_diagnostic_arg(self) -> DiagnosticArgValue<'static> {
-        match self {
-            Some(t) => t.into_diagnostic_arg(),
-            None => DiagnosticArgValue::Str(Cow::Borrowed("None")),
-        }
-    }
-}
-
 impl IntoDiagnosticArg for Symbol {
     fn into_diagnostic_arg(self) -> DiagnosticArgValue<'static> {
         self.to_ident_string().into_diagnostic_arg()