From 4c3064c6e679cfbe4ce13a76b50a17bcfffe4d71 Mon Sep 17 00:00:00 2001
From: Hugo Herbelin
Date: Sun, 30 Aug 2020 21:44:36 +0200
Subject: Fixes a freshness issue with induction (see comment in #12944).

The names computed in consume_pattern were lost when calling
intros_pattern_core. Moreover, the computation of names to avoid was
done several time. We compute it once for all.
---
 test-suite/success/induct.v | 10 ++++++++++
 1 file changed, 10 insertions(+)

(limited to 'test-suite')

diff --git a/test-suite/success/induct.v b/test-suite/success/induct.v
index 73fe53c757..a39b17e1f1 100644
--- a/test-suite/success/induct.v
+++ b/test-suite/success/induct.v
@@ -196,3 +196,13 @@ Goal forall m n:nat, n=m.
 double induction m n.
 Abort.
 
+(* Mentioned as part of bug #12944 *)
+
+Inductive test : Set := cons : forall (IHv : nat) (v : test), test.
+
+Goal test -> test.
+induction 1 as [? IHv].
+Undo.
+destruct 1 as [? IHv].
+exact IHv. (* Check that the name is granted *)
+Qed.
-- 
cgit v1.2.3


From e5890700b4574ee9207b2daf6ec95707b9290275 Mon Sep 17 00:00:00 2001
From: Gaëtan Gilbert
Date: Mon, 31 Aug 2020 12:54:54 +0200
Subject: Fix mangle names issue in induction

Fix #12944
---
 test-suite/bugs/closed/bug_12944.v | 12 ++++++++++++
 1 file changed, 12 insertions(+)
 create mode 100644 test-suite/bugs/closed/bug_12944.v

(limited to 'test-suite')

diff --git a/test-suite/bugs/closed/bug_12944.v b/test-suite/bugs/closed/bug_12944.v
new file mode 100644
index 0000000000..d6720d9906
--- /dev/null
+++ b/test-suite/bugs/closed/bug_12944.v
@@ -0,0 +1,12 @@
+
+Inductive vector A : nat -> Type :=
+  |nil : vector A 0
+  |cons : forall (h:A) (n:nat), vector A n -> vector A (S n).
+
+Global Set Mangle Names.
+
+Lemma vlookup_middle {A n} (v : vector A n) : True.
+Proof.
+  induction v as [|?? IHv].
+  all:exact I.
+Qed.
-- 
cgit v1.2.3