Pass type arguments as a list in generic methods invocations

pkg/kernel/lib/transformations/closure/converter.dart

Index: pkg/kernel/lib/transformations/closure/converter.dart
diff --git a/pkg/kernel/lib/transformations/closure/converter.dart b/pkg/kernel/lib/transformations/closure/converter.dart
index 9ebd806e1dd6344c1593c272fb21142a0446fb86..eb1ab569650577af8b38a0d2357110863301d035 100644
--- a/pkg/kernel/lib/transformations/closure/converter.dart
+++ b/pkg/kernel/lib/transformations/closure/converter.dart
@@ -739,7 +739,7 @@ class ClosureConverter extends Transformer {
         positionalParameters: positionalParameters,
         namedParameters: namedParameters,
         requiredParameterCount: function.requiredParameterCount,
-        returnType: substitute(function.returnType, substitution),
+        returnType: substitute(function.returnType, cloner.typeSubstitution),

[Dmitry Stefantsov, 2017/03/15 13:41:16]

This line fixes a bug in closure conversion. Previously, if a generic method was
torn off from a non-generic class instance, the new type information retrieved
from the method was lost and wasn't used to adjust the return type of the
method.

         inferredReturnValue: inferredReturnValue);
   }