Fixed unbound variable inspection for unreachable code (PY-6114)

python/src/com/jetbrains/python/inspections/PyUnboundLocalVariableInspection.java

@@ -123,6 +123,9 @@ public class PyUnboundLocalVariableInspection extends PyInspection {
             return;
           }
         }
+        if (PyUnreachableCodeInspection.isUnreachable(node)) {
+          return;
+        }
         if (owner instanceof PyFile) {
           if (isBuiltin) {
             return;

python/testData/inspections/PyUnboundLocalVariableInspection/UnboundUnreachable.py

@@ -0,0 +1,7 @@
+def test1(c, xs):
+    if c:
+        y = 1
+    print(<warning descr="Local variable 'y' might be referenced before assignment">y</warning>)
+    for x in xs:
+        continue
+        z = 1

python/testSrc/com/jetbrains/python/inspections/PyUnboundLocalVariableInspectionTest.java

@@ -173,6 +173,11 @@ public class PyUnboundLocalVariableInspectionTest extends PyTestCase {
     doTest();
   }
 
+  // PY-6114
+  public void testUnboundUnreachable() {
+    doTest();
+  }
+
   private void doTest() {
     myFixture.configureByFile(TEST_DIRECTORY + getTestName(false) + ".py");
     myFixture.enableInspections(PyUnboundLocalVariableInspection.class);