From 08da05299d32886bb516124fa497347b40249006 Mon Sep 17 00:00:00 2001
From: Hugo Herbelin
Date: Tue, 28 Nov 2017 19:49:02 +0100
Subject: In injection/inversion, consider all template-polymorphic types as
 injectable.

In particular singleton inductive types are considered injectable,
even in the absence of the option "Set Keep Proof Equalities".

This fixes #3125 (and #4560, #6273).
---
 test-suite/bugs/closed/3125.v | 27 +++++++++++++++++++++++++++
 1 file changed, 27 insertions(+)
 create mode 100644 test-suite/bugs/closed/3125.v

(limited to 'test-suite')

diff --git a/test-suite/bugs/closed/3125.v b/test-suite/bugs/closed/3125.v
new file mode 100644
index 0000000000..797146174d
--- /dev/null
+++ b/test-suite/bugs/closed/3125.v
@@ -0,0 +1,27 @@
+(* Not considering singleton template-polymorphic inductive types as
+   propositions for injection/inversion *)
+
+(* This is also #4560 and #6273 *)
+
+Inductive foo := foo_1.
+
+Goal forall (a b : foo), Some a = Some b -> a = b.
+Proof.
+  intros a b H.
+  inversion H.
+  reflexivity.
+Qed.
+
+(* Check that Prop is not concerned *)
+
+Inductive bar : Prop := bar_1.
+
+Goal
+  forall (a b : bar),
+    Some a = Some b ->
+    a = b.
+Proof.
+  intros a b H.
+  inversion H.
+  Fail reflexivity.
+Abort.
-- 
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