Kernel: primitive projections handling of let-ins

Fixes bug #4176 (actually two bugs in one)

Correct computation of the type of primitive projections in presence of
let-ins.

1 files changed, 11 insertions, 0 deletions

diff --git a/test-suite/bugs/closed/4276.v b/test-suite/bugs/closed/4276.v
new file mode 100644
index 000000000..ba82e6c37
--- /dev/null
+++ b/test-suite/bugs/closed/4276.v
@@ -0,0 +1,11 @@
+Set Primitive Projections.
+
+Record box (T U : Type) (x := T) := wrap { unwrap : T }.
+Definition mybox : box True False := wrap _ _ I.
+Definition unwrap' := @unwrap.
+
+Definition bad' : True := mybox.(unwrap _ _). 
+
+Fail Definition bad : False := unwrap _ _ mybox.
+
+(* Closed under the global context *)
\ No newline at end of file