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-rw-r--r--testsuite/tests/codeGen/should_compile/T18291.hs7
-rw-r--r--testsuite/tests/codeGen/should_compile/all.T1
2 files changed, 8 insertions, 0 deletions
diff --git a/testsuite/tests/codeGen/should_compile/T18291.hs b/testsuite/tests/codeGen/should_compile/T18291.hs
new file mode 100644
index 0000000000..e7ea4a08a8
--- /dev/null
+++ b/testsuite/tests/codeGen/should_compile/T18291.hs
@@ -0,0 +1,7 @@
+{-# LANGUAGE MagicHash #-}
+module T18291 where
+
+import GHC.Magic
+
+hi :: Int
+hi = runRW# $ \_ -> 42
diff --git a/testsuite/tests/codeGen/should_compile/all.T b/testsuite/tests/codeGen/should_compile/all.T
index 73c80e786e..4e0a25b7d5 100644
--- a/testsuite/tests/codeGen/should_compile/all.T
+++ b/testsuite/tests/codeGen/should_compile/all.T
@@ -91,6 +91,7 @@ test('T17648', normal, makefile_test, [])
test('T17904', normal, compile, ['-O'])
test('T18227A', normal, compile, [''])
test('T18227B', normal, compile, [''])
+test('T18291', normal, compile, ['-O0'])
test('T15570',
when(unregisterised(), skip),
compile, ['-Wno-overflowed-literals'])