Added test for EA-49318.

compiler/testData/codegen/box/regressions/ea49318.kt

@@ -0,0 +1,16 @@
+fun example(value : Int) {
+    val result: Int = if (value == 0) 1
+    else if (value == 1) 2
+    else throw IllegalArgumentException()
+    result
+}
+
+fun <T, S, U : T> foo(u: U) where U : S {}
+
+
+fun main(args : Array<String>) {
+    foo(null!!)
+}
+
+
+fun box() = "OK"

compiler/tests/org/jetbrains/jet/codegen/generated/BlackBoxCodegenTestGenerated.java

@@ -5756,6 +5756,12 @@ public class BlackBoxCodegenTestGenerated extends AbstractBlackBoxCodegenTest {
             JetTestUtils.assertAllTestsPresentByMetadata(this.getClass(), new File("compiler/testData/codegen/box/regressions"), Pattern.compile("^(.+)\\.kt$"), true);
         }
         
+        @TestMetadata("ea49318.kt")
+        public void testEa49318() throws Exception {
+            String fileName = JetTestUtils.navigationMetadata("compiler/testData/codegen/box/regressions/ea49318.kt");
+            doTest(fileName);
+        }
+        
         @TestMetadata("kt3173.kt")
         public void testKt3173() throws Exception {
             String fileName = JetTestUtils.navigationMetadata("compiler/testData/codegen/box/regressions/kt3173.kt");