Evaluator: Support 'field' variable evaluation for top-level properties

idea/idea-jvm/src/org/jetbrains/kotlin/idea/debugger/evaluate/variables/VariableFinder.kt

@@ -211,9 +211,15 @@ class VariableFinder private constructor(private val context: ExecutionContext,
     }
 
     private fun findFieldVariable(kind: VariableKind.FieldVar): Result? {
-        val thisObject = frameProxy.thisObject() ?: return null
-        val field = thisObject.referenceType().fieldByName(kind.fieldName) ?: return null
-        return Result(thisObject.getValue(field))
+        val thisObject = frameProxy.thisObject()
+        if (thisObject != null) {
+            val field = thisObject.referenceType().fieldByName(kind.fieldName) ?: return null
+            return Result(thisObject.getValue(field))
+        } else {
+            val containingType = frameProxy.safeLocation()?.declaringType() ?: return null
+            val field = containingType.fieldByName(kind.fieldName) ?: return null
+            return Result(containingType.getValue(field))
+        }
     }
 
     private fun findLocalFunction(kind: VariableKind.LocalFunction): Result? {

idea/testData/debugger/tinyApp/src/evaluate/singleBreakpoint/staticField.kt

@@ -0,0 +1,12 @@
+package staticField
+
+fun main() {
+    x
+}
+
+val x: String = "x"
+    //Breakpoint!
+    get() = "foo" + field
+
+// EXPRESSION: field
+// RESULT: "x": Ljava/lang/String;

idea/testData/debugger/tinyApp/src/evaluate/singleBreakpoint/staticField.out

@@ -0,0 +1,8 @@
+LineBreakpoint created at staticField.kt:9
+Run Java
+Connected to the target VM
+staticField.kt:9
+Compile bytecode for field
+Disconnected from the target VM
+
+Process finished with exit code 0

idea/tests/org/jetbrains/kotlin/idea/debugger/evaluate/KotlinEvaluateExpressionTestGenerated.java

@@ -356,6 +356,11 @@ public class KotlinEvaluateExpressionTestGenerated extends AbstractKotlinEvaluat
             runTest("idea/testData/debugger/tinyApp/src/evaluate/singleBreakpoint/simple.kt");
         }
 
+        @TestMetadata("staticField.kt")
+        public void testStaticField() throws Exception {
+            runTest("idea/testData/debugger/tinyApp/src/evaluate/singleBreakpoint/staticField.kt");
+        }
+
         @TestMetadata("stdlib.kt")
         public void testStdlib() throws Exception {
             runTest("idea/testData/debugger/tinyApp/src/evaluate/singleBreakpoint/stdlib.kt");