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-rw-r--r--compiler/rustc_middle/src/error.rs7
1 files changed, 7 insertions, 0 deletions
diff --git a/compiler/rustc_middle/src/error.rs b/compiler/rustc_middle/src/error.rs
index b346cd45391..3c553657087 100644
--- a/compiler/rustc_middle/src/error.rs
+++ b/compiler/rustc_middle/src/error.rs
@@ -144,5 +144,12 @@ pub struct UnsupportedFnAbi {
     pub abi: &'static str,
 }
 
+#[derive(Diagnostic)]
+#[diag(middle_erroneous_constant)]
+pub struct ErroneousConstant {
+    #[primary_span]
+    pub span: Span,
+}
+
 /// Used by `rustc_const_eval`
 pub use crate::fluent_generated::middle_adjust_for_foreign_abi_error;