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-rw-r--r--testsuite/tests/deSugar/should_run/T18151.hs10
-rw-r--r--testsuite/tests/deSugar/should_run/T18151.stdout1
-rw-r--r--testsuite/tests/deSugar/should_run/all.T1
3 files changed, 12 insertions, 0 deletions
diff --git a/testsuite/tests/deSugar/should_run/T18151.hs b/testsuite/tests/deSugar/should_run/T18151.hs
new file mode 100644
index 0000000000..b17c8a9ff0
--- /dev/null
+++ b/testsuite/tests/deSugar/should_run/T18151.hs
@@ -0,0 +1,10 @@
+-- According to the Report this should reduce to (). However, in #18151 it was
+-- reported that GHC bottoms.
+x :: ()
+x = seq (True `undefined`) ()
+{-# NOINLINE x #-}
+
+main :: IO ()
+main = do
+ print x
+
diff --git a/testsuite/tests/deSugar/should_run/T18151.stdout b/testsuite/tests/deSugar/should_run/T18151.stdout
new file mode 100644
index 0000000000..dd626a0f31
--- /dev/null
+++ b/testsuite/tests/deSugar/should_run/T18151.stdout
@@ -0,0 +1 @@
+() \ No newline at end of file
diff --git a/testsuite/tests/deSugar/should_run/all.T b/testsuite/tests/deSugar/should_run/all.T
index 757d817a0c..009b0a4686 100644
--- a/testsuite/tests/deSugar/should_run/all.T
+++ b/testsuite/tests/deSugar/should_run/all.T
@@ -63,3 +63,4 @@ test('T11601', exit_code(1), compile_and_run, [''])
test('T11747', normal, compile_and_run, ['-dcore-lint'])
test('T12595', normal, compile_and_run, [''])
test('T13285', normal, compile_and_run, [''])
+test('T18151', expect_broken(18151), compile_and_run, [''])