fixed lambda parameter names already used in the context

testData/results/TestLambdaParams.dec

@@ -0,0 +1,48 @@
+package pkg;
+
+import java.util.function.Function;
+
+public class TestLambdaParams {
+   public static void toCollection(Object var0) {
+      Object var1 = null;// 23
+      Function var2 = (var1x) -> {
+         return var0;
+      };// 24
+      Function var3 = (var1x) -> {
+         return var1;
+      };// 25
+      Function var4 = (var0x) -> {
+         return var0x;
+      };// 26
+   }// 27
+}
+
+class 'pkg/TestLambdaParams' {
+   method 'lambda$toCollection$0 (Ljava/lang/Object;Ljava/lang/Object;)Ljava/lang/Object;' {
+      1      8
+   }
+
+   method 'lambda$toCollection$1 (Ljava/lang/Class;Ljava/lang/Object;)Ljava/lang/Object;' {
+      1      11
+   }
+
+   method 'lambda$toCollection$2 (Ljava/lang/Object;)Ljava/lang/Object;' {
+      1      14
+   }
+
+   method 'toCollection (Ljava/lang/Object;)V' {
+      0      6
+      1      6
+      8      9
+      f      12
+      15      15
+      17      16
+   }
+}
+
+Lines mapping:
+23 <-> 7
+24 <-> 10
+25 <-> 13
+26 <-> 16
+27 <-> 17

testData/src/pkg/TestLambdaParams.java

@@ -0,0 +1,28 @@
+/*
+ * Copyright 2000-2014 JetBrains s.r.o.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package pkg;
+
+import java.util.function.BinaryOperator;
+import java.util.function.Function;
+
+public class TestLambdaParams {
+  public static void toCollection(Object collectionFactory) {
+    Class a = null;
+    Function f = r1 -> collectionFactory;
+    Function f1 = r1 -> a;
+    Function f2 = r1 -> r1;
+  }
+}