Work around the problem when type inference fails and StrongTypeSystemImpl.inferGenericFunctionCall…

pkg/analyzer/lib/src/summary/link.dart

Index: pkg/analyzer/lib/src/summary/link.dart
diff --git a/pkg/analyzer/lib/src/summary/link.dart b/pkg/analyzer/lib/src/summary/link.dart
index 425eda73b03b11dce82d9ec9590d06ec21fdd98a..d67a8e5c69d414c372e25656fe538c41e38b303c 100644
--- a/pkg/analyzer/lib/src/summary/link.dart
+++ b/pkg/analyzer/lib/src/summary/link.dart
@@ -2372,7 +2372,7 @@ class ExprTypeComputer {
               namedArgNames,
               namedArgTypeList,
               positionalArgTypes, const <DartType>[]);
-          if (identical(inferredType, rawType)) {
+          if (inferredType == null || identical(inferredType, rawType)) {
             inferredType = linker.typeSystem.instantiateToBounds(rawType);
           }
           return inferredType.returnType;