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-rw-r--r--src/test/ui/traits/overlap-not-permitted-for-builtin-trait.rs10
1 files changed, 10 insertions, 0 deletions
diff --git a/src/test/ui/traits/overlap-not-permitted-for-builtin-trait.rs b/src/test/ui/traits/overlap-not-permitted-for-builtin-trait.rs
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index 000000000..4106f56d6
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+++ b/src/test/ui/traits/overlap-not-permitted-for-builtin-trait.rs
@@ -0,0 +1,10 @@
+#![allow(dead_code)]
+#![feature(negative_impls)]
+
+// Overlapping negative impls for `MyStruct` are not permitted:
+struct MyStruct;
+impl !Send for MyStruct {}
+impl !Send for MyStruct {}
+//~^ ERROR conflicting implementations of trait
+
+fn main() {}