Prevent double definition of Ltac2 constructors inside a module; Fix #11046

1 files changed, 19 insertions, 0 deletions

diff --git a/test-suite/bugs/closed/bug_11046.v b/test-suite/bugs/closed/bug_11046.v
new file mode 100644
index 0000000000..c73fa78473
--- /dev/null
+++ b/test-suite/bugs/closed/bug_11046.v
@@ -0,0 +1,19 @@
+From Ltac2 Require Import Ltac2.
+
+Ltac2 Type t := [..].
+Ltac2 Type t ::= [A(int)].
+
+(* t cannot be extended with two constructors with the same name *)
+Fail Ltac2 Type t ::= [A(bool)].
+Fail Ltac2 Type t ::= [B | B(bool)].
+
+(* constructors cannot be shadowed in the same module *)
+Fail Ltac2 Type s := [A].
+
+(* constructors with the same name can be defined in distinct modules *)
+Module Other.
+  Ltac2 Type t ::= [A(bool)].
+End Other.
+Module YetAnother.
+  Ltac2 Type t' := [A].
+End YetAnother.