to make sure CFG for bad code is built correctly, visit raw targets of assignment

python/src/com/jetbrains/python/codeInsight/controlflow/PyControlFlowBuilder.java

@@ -144,7 +144,7 @@ public class PyControlFlowBuilder extends PyRecursiveElementVisitor {
     if (value != null) {
       value.accept(this);
     }
-    for (PyExpression expression : node.getTargets()) {
+    for (PyExpression expression : node.getRawTargets()) {
       expression.accept(this);
     }
   }

python/testData/codeInsight/controlflow/setcomprehension.py

@@ -0,0 +1 @@
+{ x for x in (1, 2) } = 5

python/testData/codeInsight/controlflow/setcomprehension.txt

@@ -0,0 +1,9 @@
+0(1) element: null
+1(2) element: PyAssignmentStatement
+2(3) element: PySetCompExpression
+3(4,8) element: PyParenthesizedExpression
+4(5) element: PyTargetExpression: x
+5(6) WRITE ACCESS: x
+6(7) element: PyReferenceExpression: x
+7(4,8) READ ACCESS: x
+8() element: null

python/testSrc/com/jetbrains/python/PyControlFlowBuilderTest.java

@@ -170,6 +170,10 @@ public class PyControlFlowBuilderTest extends LightMarkedTestCase {
     doTestFirstStatement();
   }
 
+  public void testSetComprehension() {
+    doTest();
+  }
+
   public void testQualifiedSelfReference() {
     final String testName = getTestName(false).toLowerCase();
     configureByFile(testName + ".py");