1 files changed, 12 insertions, 0 deletions
diff --git a/tests/ui/borrowck/tainted-promoteds.rs b/tests/ui/borrowck/tainted-promoteds.rs
new file mode 100644
index 000000000..2b6f0ddbd
--- /dev/null
+++ b/tests/ui/borrowck/tainted-promoteds.rs
@@ -0,0 +1,12 @@
+// Regression test for issue #110856, where a borrowck error for a MIR tainted
+// all promoteds within. This in turn generated a spurious "erroneous constant
+// used" note when trying to evaluate a promoted.
+
+pub fn f() -> u32 {
+    let a = 0;
+    a = &0 * &1 * &2 * &3;
+    //~^ ERROR: cannot assign twice to immutable variable
+    a
+}
+
+fn main() {}