1 files changed, 16 insertions, 0 deletions
diff --git a/test-suite/bugs/closed/6191.v b/test-suite/bugs/closed/6191.v
new file mode 100644
index 00000000..e0d91250
--- /dev/null
+++ b/test-suite/bugs/closed/6191.v
@@ -0,0 +1,16 @@
+(* Check a 8.7.1 regression in ring_simplify *)
+
+Require Import ArithRing BinNat.
+Goal forall f x, (2+x+f (N.to_nat 2)+3=4).
+intros.
+ring_simplify (2+x+f (N.to_nat 2)+3).
+match goal with |- x + f (N.to_nat 2) + 5 = 4 => idtac end.
+Abort.
+
+Require Import ZArithRing BinInt.
+Open Scope Z_scope.
+Goal forall x, (2+x+3=4).
+intros.
+ring_simplify (2+x+3).
+match goal with |- x+5 = 4 => idtac end.
+Abort.