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Diffstat (limited to 'compiler/rustc_builtin_macros/src/edition_panic.rs')
-rw-r--r--compiler/rustc_builtin_macros/src/edition_panic.rs2
1 files changed, 1 insertions, 1 deletions
diff --git a/compiler/rustc_builtin_macros/src/edition_panic.rs b/compiler/rustc_builtin_macros/src/edition_panic.rs
index fa22e911642..bb3c83e8c0e 100644
--- a/compiler/rustc_builtin_macros/src/edition_panic.rs
+++ b/compiler/rustc_builtin_macros/src/edition_panic.rs
@@ -40,7 +40,7 @@ pub fn expand_unreachable<'cx>(
 
 fn expand<'cx>(
     mac: rustc_span::Symbol,
-    cx: &'cx mut ExtCtxt<'_>,
+    cx: &'cx ExtCtxt<'_>,
     sp: Span,
     tts: TokenStream,
 ) -> MacroExpanderResult<'cx> {