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diff --git a/src/test/ui/const-generics/bad-const-generic-exprs.stderr b/src/test/ui/const-generics/bad-const-generic-exprs.stderr
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@@ -0,0 +1,59 @@
+error: invalid const generic expression
+ --> $DIR/bad-const-generic-exprs.rs:4:16
+ |
+LL | let _: Wow<if true {}>;
+ | ^^^^^^^^^^
+ |
+help: expressions must be enclosed in braces to be used as const generic arguments
+ |
+LL | let _: Wow<{ if true {} }>;
+ | + +
+
+error: invalid const generic expression
+ --> $DIR/bad-const-generic-exprs.rs:7:16
+ |
+LL | let _: Wow<|| ()>;
+ | ^^^^^
+ |
+help: expressions must be enclosed in braces to be used as const generic arguments
+ |
+LL | let _: Wow<{ || () }>;
+ | + +
+
+error: expected one of `,` or `>`, found `.`
+ --> $DIR/bad-const-generic-exprs.rs:10:17
+ |
+LL | let _: Wow<A.b>;
+ | ^ expected one of `,` or `>`
+ |
+help: expressions must be enclosed in braces to be used as const generic arguments
+ |
+LL | let _: Wow<{ A.b }>;
+ | + +
+
+error: expected one of `,` or `>`, found `.`
+ --> $DIR/bad-const-generic-exprs.rs:13:17
+ |
+LL | let _: Wow<A.0>;
+ | ^ expected one of `,` or `>`
+ |
+help: expressions must be enclosed in braces to be used as const generic arguments
+ |
+LL | let _: Wow<{ A.0 }>;
+ | + +
+
+error: expected type, found `12`
+ --> $DIR/bad-const-generic-exprs.rs:19:17
+ |
+LL | let _: Wow<[12]>;
+ | ^^ expected type
+
+error[E0747]: type provided when a constant was expected
+ --> $DIR/bad-const-generic-exprs.rs:19:16
+ |
+LL | let _: Wow<[12]>;
+ | ^^^^
+
+error: aborting due to 6 previous errors
+
+For more information about this error, try `rustc --explain E0747`.