Add test for uncovered case.

js/js.libraries/src/core/core.kt

@@ -19,6 +19,10 @@ fun print(s : Any?) {}
 library("parseInt")
 fun parseInt(s : String) : Int = js.noImpl
 library
+fun safeParseInt(s : String) : Int? = js.noImpl
+library
+fun safeParseDouble(s : String) : Double? = js.noImpl
+library
 open class Exception() : Throwable() {}
 library
 class NumberFormatException() : Exception() {}

js/js.tests/test/org/jetbrains/k2js/test/semantics/MiscTest.java

@@ -113,4 +113,8 @@ public final class MiscTest extends AbstractExpressionTest {
     public void testTemporaryVariableCreatedInNamespaceInitializer() throws Exception {
         checkFooBoxIsTrue("temporaryVariableCreatedInNamespaceInitializer.kt");
     }
+
+    public void testWhenReturnedWithoutBlock() throws Exception {
+        checkFooBoxIsTrue("whenReturnedWithoutBlock.kt");
+    }
 }

js/js.translator/testFiles/expression/misc/cases/whenReturnedWithoutBlock.kt

@@ -0,0 +1,18 @@
+package foo
+
+fun box() : Boolean {
+  if (t(1) != 0) {
+      return false
+  }
+  if (t(0) != 1) {
+      return false
+  }
+  return (t(100) == 2)
+
+}
+
+fun t(i : Int) = when(i) {
+  0 -> 1
+  1 -> 0
+  else -> 2
+}