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-rw-r--r--tests/untried/neg/unchecked-knowable.check9
1 files changed, 9 insertions, 0 deletions
diff --git a/tests/untried/neg/unchecked-knowable.check b/tests/untried/neg/unchecked-knowable.check
new file mode 100644
index 000000000..327a5f202
--- /dev/null
+++ b/tests/untried/neg/unchecked-knowable.check
@@ -0,0 +1,9 @@
+unchecked-knowable.scala:18: warning: fruitless type test: a value of type Bippy cannot also be a A1
+ /* warn */ (new Bippy).isInstanceOf[A1]
+ ^
+unchecked-knowable.scala:19: warning: fruitless type test: a value of type Bippy cannot also be a B1
+ /* warn */ (new Bippy).isInstanceOf[B1]
+ ^
+error: No warnings can be incurred under -Xfatal-warnings.
+two warnings found
+one error found