Merge PR #6274: Attempt to fix inversion disregarding singleton types (fixes #3125)

1 files changed, 27 insertions, 0 deletions

diff --git a/test-suite/bugs/closed/3125.v b/test-suite/bugs/closed/3125.v
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+++ b/test-suite/bugs/closed/3125.v
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+(* 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.