Added regression tests for bugs + miscellaneous improvements

- #2095 (not fixed in v8.2 but fixed in v8.3 and trunk)
- #2108 (fixed in v8.2, v8.3, trunk)
- #2102 (moved warning to msg_warning to ensure flushing, but still
   open enhancement)

git-svn-id: svn+ssh://scm.gforge.inria.fr/svn/coq/trunk@13121 85f007b7-540e-0410-9357-904b9bb8a0f7

3 files changed, 47 insertions, 3 deletions

diff --git a/test-suite/bugs/closed/shouldsucceed/2095.v b/test-suite/bugs/closed/shouldsucceed/2095.v
new file mode 100644
index 0000000000..28ea99dfef
--- /dev/null
+++ b/test-suite/bugs/closed/shouldsucceed/2095.v
@@ -0,0 +1,19 @@
+(* Classes and sections *)
+
+Section OPT.
+  Variable A: Type.
+
+  Inductive MyOption: Type :=
+  | MyNone: MyOption
+  | MySome: A -> MyOption.
+
+  Class Opt: Type := {
+    f_opt: A -> MyOption
+  }.
+End OPT.
+
+Definition f_nat (n: nat):  MyOption nat := MySome _ n.
+
+Instance Nat_Opt: Opt nat := {
+  f_opt := f_nat
+}.
diff --git a/test-suite/bugs/closed/shouldsucceed/2108.v b/test-suite/bugs/closed/shouldsucceed/2108.v
new file mode 100644
index 0000000000..cad8baa981
--- /dev/null
+++ b/test-suite/bugs/closed/shouldsucceed/2108.v
@@ -0,0 +1,22 @@
+(* Declare Module in Module Type *)
+Module Type A.
+Record t : Set := { something : unit }.
+End A.
+
+
+Module Type B.
+Declare Module BA : A.
+End B.
+
+
+Module Type C.
+Declare Module CA  : A.
+Declare Module CB : B with Module BA := CA.
+End C.
+
+
+Module Type D.
+Declare Module DA : A.
+(* Next line gives: "Anomaly: uncaught exception Not_found. Please report." *)
+Declare Module DC : C with Module CA := DA.
+End D.
diff --git a/toplevel/command.ml b/toplevel/command.ml
index d20c213c4d..8d840a4580 100644
--- a/toplevel/command.ml
+++ b/toplevel/command.ml
@@ -426,8 +426,11 @@ let non_full_mutual_message x xge y yge isfix rest =
   let e = if rest <> [] then "e.g.: "^reason else reason in
   let k = if isfix then "fixpoint" else "cofixpoint" in
   let w =
-    if isfix then "Well-foundedness check may fail unexpectedly.\n" else "" in
-  "Not a fully mutually defined "^k^"\n("^e^").\n"^w
+    if isfix
+    then strbrk "Well-foundedness check may fail unexpectedly." ++ fnl()
+    else mt () in
+  strbrk ("Not a fully mutually defined "^k) ++ fnl () ++
+  strbrk ("("^e^").") ++ fnl () ++ w
 
 let check_mutuality env isfix fixl =
   let names = List.map fst fixl in
@@ -438,7 +441,7 @@ let check_mutuality env isfix fixl =
   let po = partial_order preorder in
   match List.filter (function (_,Inr _) -> true | _ -> false) po with
     | (x,Inr xge)::(y,Inr yge)::rest ->
-	if_verbose warning (non_full_mutual_message x xge y yge isfix rest)
+	if_verbose msg_warning (non_full_mutual_message x xge y yge isfix rest)
     | _ -> ()
 
 type structured_fixpoint_expr = {