REPL: sanitize stack traces

Don't include our compiler's and preloader's internal code, reflection, native
methods etc. Also delete "substring" matching logic from tests

compiler/cli/src/org/jetbrains/jet/cli/jvm/repl/ReplInterpreter.java

@@ -276,7 +276,7 @@ public class ReplInterpreter {
                 scriptInstance = scriptInstanceConstructor.newInstance(constructorArgs);
             }
             catch (Throwable e) {
-                return LineResult.error(Throwables.getStackTraceAsString(e.getCause()));
+                return LineResult.error(renderStackTrace(e.getCause()));
             }
             Field rvField = scriptClass.getDeclaredField("rv");
             rvField.setAccessible(true);
@@ -295,6 +295,27 @@ public class ReplInterpreter {
         }
     }
 
+    @NotNull
+    private static String renderStackTrace(@NotNull Throwable cause) {
+        StackTraceElement[] oldTrace = cause.getStackTrace();
+        List<StackTraceElement> newTrace = new ArrayList<StackTraceElement>();
+        boolean skip = true;
+        for (int i = oldTrace.length - 1; i >= 0; i--) {
+            StackTraceElement element = oldTrace[i];
+            // All our code happens in the script constructor, and no reflection/native code happens in constructors.
+            // So we ignore everything in the stack trace until the first constructor
+            if (element.getMethodName().equals("<init>")) {
+                skip = false;
+            }
+            if (!skip) {
+                newTrace.add(element);
+            }
+        }
+        Collections.reverse(newTrace);
+        cause.setStackTrace(newTrace.toArray(new StackTraceElement[newTrace.size()]));
+        return Throwables.getStackTraceAsString(cause);
+    }
+
     @Nullable
     private ScriptDescriptor doAnalyze(@NotNull JetFile psiFile, @NotNull MessageCollector messageCollector) {
         WritableScope scope = new WritableScopeImpl(