Add a test

Dylan-DPC-zz · Jan 3, 2020 · 6bd6a20 · 6bd6a20
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diff --git a/src/test/ui/deduplicate-diagnostics.deduplicate.stderr b/src/test/ui/deduplicate-diagnostics.deduplicate.stderr
@@ -0,0 +1,8 @@
+error: cannot find derive macro `Unresolved` in this scope
+  --> $DIR/deduplicate-diagnostics.rs:4:10
+   |
+LL | #[derive(Unresolved)]
+   |          ^^^^^^^^^^
+
+error: aborting due to previous error
+
diff --git a/src/test/ui/deduplicate-diagnostics.duplicate.stderr b/src/test/ui/deduplicate-diagnostics.duplicate.stderr
@@ -0,0 +1,14 @@
+error: cannot find derive macro `Unresolved` in this scope
+  --> $DIR/deduplicate-diagnostics.rs:4:10
+   |
+LL | #[derive(Unresolved)]
+   |          ^^^^^^^^^^
+
+error: cannot find derive macro `Unresolved` in this scope
+  --> $DIR/deduplicate-diagnostics.rs:4:10
+   |
+LL | #[derive(Unresolved)]
+   |          ^^^^^^^^^^
+
+error: aborting due to 2 previous errors
+
diff --git a/src/test/ui/deduplicate-diagnostics.rs b/src/test/ui/deduplicate-diagnostics.rs
@@ -0,0 +1,8 @@
+// revisions: duplicate deduplicate
+//[duplicate] compile-flags: -Z deduplicate-diagnostics=no
+
+#[derive(Unresolved)] //~ ERROR cannot find derive macro `Unresolved` in this scope
+                      //[duplicate]~| ERROR cannot find derive macro `Unresolved` in this scope
+struct S;
+
+fn main() {}