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-rw-r--r--src/test/ui/feature-gates/feature-gate-transparent_unions.rs7
1 files changed, 7 insertions, 0 deletions
diff --git a/src/test/ui/feature-gates/feature-gate-transparent_unions.rs b/src/test/ui/feature-gates/feature-gate-transparent_unions.rs
new file mode 100644
index 000000000..73cac0a49
--- /dev/null
+++ b/src/test/ui/feature-gates/feature-gate-transparent_unions.rs
@@ -0,0 +1,7 @@
+#[repr(transparent)]
+union OkButUnstableUnion { //~ ERROR transparent unions are unstable
+ field: u8,
+ zst: (),
+}
+
+fn main() {}