Merge PR #12508: Fix #12507 Anomaly when using a ssreflect `reflect` view

Reviewed-by: CohenCyril
Reviewed-by: ppedrot

1 files changed, 30 insertions, 0 deletions

diff --git a/test-suite/ssr/rewrtite_err_msg.v b/test-suite/ssr/rewrtite_err_msg.v
new file mode 100644
index 0000000000..2bbbff433c
--- /dev/null
+++ b/test-suite/ssr/rewrtite_err_msg.v
@@ -0,0 +1,30 @@
+Require Import ssreflect ssrbool.
+
+Set Implicit Arguments.
+Unset Strict Implicit.
+Unset Printing Implicit Defensive.
+
+Axiom finGroupType : Type.
+Axiom group : finGroupType -> Type.
+Axiom abelian : forall gT : finGroupType, group gT -> Prop.
+Arguments abelian {_} _.
+Axiom carrier : finGroupType -> Type.
+Coercion carrier : finGroupType >-> Sortclass.
+Axiom mem : forall gT : finGroupType, gT -> group gT -> Prop.
+Arguments mem {_} _ _.
+Axiom mul : forall gT : finGroupType, gT -> gT -> gT.
+Arguments mul {_} _ _.
+Definition centralised gT (G : group gT) (x : gT) := forall y, mul x y = mul y x.
+Arguments centralised {gT} _.
+Axiom b : bool.
+
+Axiom centsP : forall (gT : finGroupType) (A B : group gT),
+  reflect (forall a, mem a A -> centralised B a) b.
+Arguments centsP {_ _ _}.
+
+Lemma commute_abelian (gT : finGroupType) (G : group gT)
+  (G_abelian : abelian G) (g g' : gT) (gG : mem g  G) (g'G : mem g'  G) :
+  mul g g' = mul g' g.
+Proof.
+Fail rewrite (centsP _). (* fails but without an anomaly *)
+Abort.