Program: 87431
Project: 87431
Buggy source:
/** 
 * Handle a non-separator.
 * @param settingsValues The current settings values.
 * @param codePoint the code point associated with the key.
 * @param x the x-coordinate of the key press, or Contants.NOT_A_COORDINATE if not applicable.
 * @param y the y-coordinate of the key press, or Contants.NOT_A_COORDINATE if not applicable.
 * @param spaceState the space state at start of the batch input.
 */
private void handleNonSeparator(final SettingsValues settingsValues,final int codePoint,final int x,final int y,final int spaceState,final KeyboardSwitcher keyboardSwitcher,final LatinIME.UIHandler handler){
  boolean isComposingWord=mWordComposer.isComposingWord();
  if (SpaceState.PHANTOM == spaceState && !settingsValues.isWordConnector(codePoint)) {
    if (isComposingWord) {
      throw new RuntimeException("String_Node_Str");
    }
    promotePhantomSpace(settingsValues);
  }
  if (mWordComposer.isCursorFrontOrMiddleOfComposingWord()) {
    resetEntireInputState(settingsValues,mConnection.getExpectedSelectionStart(),mConnection.getExpectedSelectionEnd());
    isComposingWord=false;
  }
  if (!isComposingWord && settingsValues.isWordCodePoint(codePoint) && settingsValues.isSuggestionsRequested()&& (!mConnection.isCursorTouchingWord(settingsValues.mSpacingAndPunctuations) || !settingsValues.mSpacingAndPunctuations.mCurrentLanguageHasSpaces)) {
    isComposingWord=(Constants.CODE_SINGLE_QUOTE != codePoint && Constants.CODE_DASH != codePoint);
    resetComposingState(false);
  }
  if (isComposingWord) {
    mWordComposer.add(codePoint,x,y);
    if (mWordComposer.size() == 1) {
      mWordComposer.setCapitalizedModeAndPreviousWordAtStartComposingTime(getActualCapsMode(settingsValues,keyboardSwitcher.getKeyboardShiftMode()),getNthPreviousWordForSuggestion(settingsValues.mSpacingAndPunctuations,1));
    }
    mConnection.setComposingText(getTextWithUnderline(mWordComposer.getTypedWord()),1);
  }
 else {
    final boolean swapWeakSpace=maybeStripSpace(settingsValues,codePoint,spaceState,Constants.SUGGESTION_STRIP_COORDINATE == x);
    sendKeyCodePoint(settingsValues,codePoint);
    if (swapWeakSpace) {
      swapSwapperAndSpace(keyboardSwitcher);
      mSpaceState=SpaceState.WEAK;
    }
    mSuggestionStripViewAccessor.dismissAddToDictionaryHint();
  }
  handler.postUpdateSuggestionStrip();
  if (settingsValues.mIsInternal) {
    LatinImeLoggerUtils.onNonSeparator((char)codePoint,x,y);
  }
}

Fixed version (ground truth):
/** 
 * Handle a non-separator.
 * @param settingsValues The current settings values.
 * @param codePoint the code point associated with the key.
 * @param x the x-coordinate of the key press, or Contants.NOT_A_COORDINATE if not applicable.
 * @param y the y-coordinate of the key press, or Contants.NOT_A_COORDINATE if not applicable.
 * @param spaceState the space state at start of the batch input.
 */
private void handleNonSeparator(final SettingsValues settingsValues,final int codePoint,final int x,final int y,final int spaceState,final KeyboardSwitcher keyboardSwitcher,final LatinIME.UIHandler handler){
  boolean isComposingWord=mWordComposer.isComposingWord();
  if (SpaceState.PHANTOM == spaceState && !settingsValues.isWordConnector(codePoint)) {
    if (isComposingWord) {
      throw new RuntimeException("String_Node_Str");
    }
    promotePhantomSpace(settingsValues);
  }
  if (mWordComposer.isCursorFrontOrMiddleOfComposingWord()) {
    resetEntireInputState(settingsValues,mConnection.getExpectedSelectionStart(),mConnection.getExpectedSelectionEnd(),true);
    isComposingWord=false;
  }
  if (!isComposingWord && settingsValues.isWordCodePoint(codePoint) && settingsValues.isSuggestionsRequested()&& (!mConnection.isCursorTouchingWord(settingsValues.mSpacingAndPunctuations) || !settingsValues.mSpacingAndPunctuations.mCurrentLanguageHasSpaces)) {
    isComposingWord=(Constants.CODE_SINGLE_QUOTE != codePoint && Constants.CODE_DASH != codePoint);
    resetComposingState(false);
  }
  if (isComposingWord) {
    mWordComposer.add(codePoint,x,y);
    if (mWordComposer.size() == 1) {
      mWordComposer.setCapitalizedModeAndPreviousWordAtStartComposingTime(getActualCapsMode(settingsValues,keyboardSwitcher.getKeyboardShiftMode()),getNthPreviousWordForSuggestion(settingsValues.mSpacingAndPunctuations,1));
    }
    mConnection.setComposingText(getTextWithUnderline(mWordComposer.getTypedWord()),1);
  }
 else {
    final boolean swapWeakSpace=maybeStripSpace(settingsValues,codePoint,spaceState,Constants.SUGGESTION_STRIP_COORDINATE == x);
    sendKeyCodePoint(settingsValues,codePoint);
    if (swapWeakSpace) {
      swapSwapperAndSpace(keyboardSwitcher);
      mSpaceState=SpaceState.WEAK;
    }
    mSuggestionStripViewAccessor.dismissAddToDictionaryHint();
  }
  handler.postUpdateSuggestionStrip();
  if (settingsValues.mIsInternal) {
    LatinImeLoggerUtils.onNonSeparator((char)codePoint,x,y);
  }
}