IDEA-167578 Uncompilable code after convertion forEach -> Loop with generics wildcard

java/java-impl/src/com/intellij/codeInspection/streamToLoop/StreamToLoopInspection.java

@@ -199,6 +199,7 @@ public class StreamToLoopInspection extends BaseJavaBatchLocalInspectionTool {
       if (fn == null) return null;
       PsiType elementType = PsiUtil.substituteTypeParameter(type, CommonClassNames.JAVA_LANG_ITERABLE, 0, false);
       if(elementType == null) return null;
+      elementType = GenericsUtil.getVariableTypeByExpressionType(elementType);
       TerminalOperation terminal = new TerminalOperation.ForEachTerminalOperation(fn);
       SourceOperation source = new SourceOperation.ForEachSource(qualifier);
       OperationRecord terminalRecord = new OperationRecord();

java/java-tests/testData/codeInsight/daemonCodeAnalyzer/quickFix/streamToLoop/afterIterableForEach.java

@@ -1,8 +1,6 @@
 // "Fix all 'Stream API call chain can be replaced with loop' problems in file" "true"
 
-import java.util.Arrays;
-import java.util.Collections;
-import java.util.List;
+import java.util.*;
 import java.util.function.Function;
 import java.util.stream.Stream;
 
@@ -19,4 +17,24 @@ public class Main {
           System.out.println(s);
       }
   }
+
+  public static <T extends Collection<?>> T test(T collection) {
+      for (Object o : collection) {
+          System.out.println(o);
+      }
+      return collection;
+  }
+
+  public interface SomeInterface {
+
+    Set<? extends SomeInterface> nodes();
+
+    default void accept(Visitor visitor) {
+        for (SomeInterface child : new LinkedHashSet<>(this.nodes())) {
+            child.accept(visitor);
+        }
+    }
+
+    interface Visitor { }
+  }
 }

java/java-tests/testData/codeInsight/daemonCodeAnalyzer/quickFix/streamToLoop/beforeIterableForEach.java

@@ -1,8 +1,6 @@
 // "Fix all 'Stream API call chain can be replaced with loop' problems in file" "true"
 
-import java.util.Arrays;
-import java.util.Collections;
-import java.util.List;
+import java.util.*;
 import java.util.function.Function;
 import java.util.stream.Stream;
 
@@ -15,4 +13,20 @@ public class Main {
     List<String> list = Arrays.asList("a", "b");
     list.forEach(System.out::println);
   }
+
+  public static <T extends Collection<?>> T test(T collection) {
+    collection.forEach(System.out::println);
+    return collection;
+  }
+
+  public interface SomeInterface {
+
+    Set<? extends SomeInterface> nodes();
+
+    default void accept(Visitor visitor) {
+      new LinkedHashSet<>(this.nodes()).forEach(child -> child.accept(visitor));
+    }
+
+    interface Visitor { }
+  }
 }