rta: do no visit borken method

Signed-off-by: Jean Privat <jean@pryen.org>

diff --git a/src/rapid_type_analysis.nit b/src/rapid_type_analysis.nit
index 3be979a..0fa3472 100644 (file)
--- a/src/rapid_type_analysis.nit
+++ b/src/rapid_type_analysis.nit
@@ -217,13 +217,16 @@ class RapidTypeAnalysis
                while not todo.is_empty do
                        var mmethoddef = todo.shift
                        var mmeth = mmethoddef.mproperty
+                       var msignature = mmethoddef.msignature
+                       if msignature == null then continue # Skip broken method
+
                        #print "# visit {mmethoddef}"
                        var v = new RapidTypeVisitor(self, mmethoddef.mclassdef.bound_mtype, mmethoddef)
 
-                       var vararg_rank = mmethoddef.msignature.vararg_rank
+                       var vararg_rank = msignature.vararg_rank
                        if vararg_rank > -1 then
                                var node = self.modelbuilder.mpropdef2node(mmethoddef)
-                               var elttype = mmethoddef.msignature.mparameters[vararg_rank].mtype
+                               var elttype = msignature.mparameters[vararg_rank].mtype
                                #elttype = elttype.anchor_to(self.mainmodule, v.receiver)
                                var vararg = self.mainmodule.array_type(elttype)
                                v.add_type(vararg)
@@ -233,7 +236,7 @@ class RapidTypeAnalysis
                        end
 
                        # TODO? new_msignature
-                       var sig = mmethoddef.msignature.as(not null)
+                       var sig = msignature
                        var osig = mmeth.intro.msignature.as(not null)
                        for i in [0..sig.arity[ do
                                var origtype = osig.mparameters[i].mtype
@@ -254,7 +257,7 @@ class RapidTypeAnalysis
                                continue
                        else if mmethoddef.constant_value != null then
                                # Make the return type live
-                               v.add_type(mmethoddef.msignature.return_mtype.as(MClassType))
+                               v.add_type(msignature.return_mtype.as(MClassType))
                                continue
                        else if npropdef == null then
                                abort
@@ -274,7 +277,7 @@ class RapidTypeAnalysis
 
                        if mmethoddef.is_intern or mmethoddef.is_extern then
                                # UGLY: We force the "instantation" of the concrete return type if any
-                               var ret = mmethoddef.msignature.return_mtype
+                               var ret = msignature.return_mtype
                                if ret != null and ret isa MClassType and ret.mclass.kind != abstract_kind and ret.mclass.kind != interface_kind then
                                        v.add_type(ret)
                                end