2 files changed, 67 insertions, 0 deletions
diff --git a/test-suite/bugs/closed/4720.v b/test-suite/bugs/closed/4720.v
new file mode 100644
index 000000000..9265b60c1
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+++ b/test-suite/bugs/closed/4720.v
@@ -0,0 +1,46 @@
+(** Bug 4720 : extraction and "with" in module type *)
+
+Module Type A.
+ Parameter t : Set.
+End A.
+
+Module A_instance <: A.
+ Definition t := nat.
+End A_instance.
+
+Module A_private : A.
+ Definition t := nat.
+End A_private.
+
+Module Type B.
+End B.
+
+Module Type C (b : B).
+ Declare Module a : A.
+End C.
+
+Module WithMod (a' : A) (b' : B) (c' : C b' with Module a := A_instance).
+End WithMod.
+
+Module WithDef (a' : A) (b' : B) (c' : C b' with Definition a.t := nat).
+End WithDef.
+
+Module WithModPriv (a' : A) (b' : B) (c' : C b' with Module a := A_private).
+End WithModPriv.
+
+(* The initial bug report was concerning the extraction of WithModPriv
+   in Coq 8.4, which was suboptimal: it was compiling, but could have been
+   turned into some faulty code since A_private and c'.a were not seen as
+   identical by the extraction.
+
+   In Coq 8.5 and 8.6, the extractions of WithMod, WithDef, WithModPriv
+   were all causing Anomaly or Assert Failure. This shoud be fixed now.
+*)
+
+Require Extraction.
+
+Recursive Extraction WithMod.
+
+Recursive Extraction WithDef.
+
+Recursive Extraction WithModPriv.
diff --git a/test-suite/bugs/closed/5177.v b/test-suite/bugs/closed/5177.v
new file mode 100644
index 000000000..231d103a5
--- /dev/null
+++ b/test-suite/bugs/closed/5177.v
@@ -0,0 +1,21 @@
+(* Bug 5177 https://coq.inria.fr/bug/5177 :
+   Extraction and module type containing application and "with" *)
+
+Module Type T.
+  Parameter t: Type.
+End T.
+
+Module Type A (MT: T).
+  Parameter t1: Type.
+  Parameter t2: Type.
+  Parameter bar: MT.t -> t1 -> t2.
+End A.
+
+Module MakeA(MT: T): A MT with Definition t1 := nat.
+  Definition t1 := nat.
+  Definition t2 := nat.
+  Definition bar (m: MT.t) (x:t1) := x.
+End MakeA.
+
+Require Extraction.
+Recursive Extraction MakeA.