X-Git-Url: http://nitlanguage.org

diff --git a/src/ffi/extern_classes.nit b/src/ffi/extern_classes.nit
index 4e8f45d..40459df 100644
--- a/src/ffi/extern_classes.nit
+++ b/src/ffi/extern_classes.nit
@@ -17,7 +17,8 @@
 # Manages all extern classes and their associated foreign type.
 module extern_classes
 
-import ffi_base
+import light_ffi_base
+import modelize
 
 redef class ToolContext
 	var extern_classes_typing_phase_ast: Phase = new ExternClassesTypingPhaseAst(self, [ffi_language_assignation_phase, modelize_class_phase])
@@ -38,8 +39,8 @@ private class ExternClassesTypingPhaseAst
 		if code_block == null then return
 
 		if nclassdef.n_kwredef != null then
-			# A redef cannot specifiy a different extern type
-			toolcontext.error(nclassdef.location, "Only the introduction of a class can specify an extern type.")
+			# A redef cannot specify a different extern type
+			toolcontext.error(nclassdef.location, "FFI Error: only the introduction of a class can declare an extern type.")
 			return
 		end
 
@@ -109,7 +110,7 @@ redef class MClass
 			var ftype_b: nullable ForeignType = null # FIXME hack to circumvent bug where ftype is typed null
 
 			# look in super classes
-			for s in in_hierarchy(intro.mmodule).direct_greaters do
+			for s in in_hierarchy(intro_mmodule).direct_greaters do
 				var super_ftype = s.compute_ftype(v)
 				if super_ftype != null then
 					if ftype_b == null then
@@ -118,7 +119,7 @@ redef class MClass
 					else
 						# detect conflict
 						if super_ftype != ftype_b then
-							v.toolcontext.error(null, "Extern type conflict in {self}")
+							v.toolcontext.error(null, "FFI Error: extern type conflict in `{self}`.")
 							return null
 						end
 					end