KT-1536: parse Throwable as nullable in JavaDescriptorResolver

compiler/frontend.java/src/org/jetbrains/jet/lang/resolve/java/JavaTypeTransformer.java

@@ -207,7 +207,7 @@ public class JavaTypeTransformer {
             classTypesMap.put("java.lang.Object", JetStandardClasses.getNullableAnyType());
             classTypesMap.put("java.lang.String", standardLibrary.getNullableStringType());
             classTypesMap.put("java.lang.CharSequence", standardLibrary.getNullableCharSequenceType());
-            classTypesMap.put("java.lang.Throwable", standardLibrary.getThrowableType());
+            classTypesMap.put("java.lang.Throwable", standardLibrary.getNullableThrowableType());
         }
         return classTypesMap;
     }

compiler/testData/readJavaBinaryClass/MyException.java

@@ -0,0 +1,7 @@
+// http://youtrack.jetbrains.com/issue/KT-1536
+
+package test;
+
+class MyException {
+    MyException(String message, Throwable cause) {}
+}

compiler/testData/readJavaBinaryClass/MyException.kt

@@ -0,0 +1,3 @@
+package test
+
+open class MyException(p0: String?, p1: Throwable?)

compiler/testData/readJavaBinaryClass/MyException.txt

@@ -0,0 +1,5 @@
+namespace test
+
+open class test.MyException : jet.Any {
+    final /*constructor*/ fun <init>(/*0*/ p0: jet.String?, /*1*/ p1: jet.Throwable?): test.MyException
+}