Fix #9240: Register for IDProp causes anomaly when non constant

1 files changed, 12 insertions, 0 deletions

diff --git a/test-suite/bugs/closed/bug_9240.v b/test-suite/bugs/closed/bug_9240.v
new file mode 100644
index 0000000000..e0901dc2d9
--- /dev/null
+++ b/test-suite/bugs/closed/bug_9240.v
@@ -0,0 +1,12 @@
+Register unit as core.IDProp.type.
+Register tt as core.IDProp.idProp.
+
+
+Inductive vec (A : Type) : nat -> Type :=
+| nil : vec A 0
+| cons : forall n : nat, A -> vec A n -> vec A (S n).
+
+Definition hd (A : Type) (n : nat) (v : vec A (S n)) : A :=
+match v in (vec _ (S n)) return A with
+| cons _ _ h _ => h
+end. (* assertion failure in evarconv *)