Program: 240
Project: 240
Buggy source:
private TextRange findIt(Editor editor,DataContext context,int startOffset,int count,int dir,boolean noSmartCase){
  TextRange res=null;
  if (lastSearch == null || lastSearch.length() == 0) {
    return res;
  }
  RegExp sp;
  RegExp.regmmatch_T regmatch=new RegExp.regmmatch_T();
  regmatch.rmm_ic=shouldIgnoreCase(lastSearch,noSmartCase);
  sp=new RegExp();
  regmatch.regprog=sp.vim_regcomp(lastSearch,1);
  if (regmatch == null) {
    logger.debug("String_Node_Str" + lastSearch);
    return res;
  }
  LogicalPosition lpos=editor.offsetToLogicalPosition(startOffset);
  RegExp.lpos_T pos=new RegExp.lpos_T();
  pos.lnum=lpos.line;
  pos.col=lpos.column;
  int found;
  int lnum;
  CharPointer ptr=null;
  int matchcol;
  int startcol;
  RegExp.lpos_T endpos=new RegExp.lpos_T();
  int loop;
  RegExp.lpos_T start_pos;
  boolean at_first_line;
  int extra_col=1;
  boolean match_ok;
  long nmatched;
  int first_lnum;
  boolean p_ws=Options.getInstance().isSet("String_Node_Str");
  do {
    start_pos=new RegExp.lpos_T(pos);
    found=0;
    at_first_line=true;
    if (pos.lnum == -1) {
      pos.lnum=0;
      pos.col=0;
      at_first_line=false;
    }
    if (dir == -1 && start_pos.col == 0) {
      lnum=pos.lnum - 1;
      at_first_line=false;
    }
 else {
      lnum=pos.lnum;
    }
    for (loop=0; loop <= 1; ++loop) {
      int lineCount=EditorHelper.getLineCount(editor);
      for (; lnum >= 0 && lnum < lineCount; lnum+=dir, at_first_line=false) {
        first_lnum=lnum;
        nmatched=sp.vim_regexec_multi(regmatch,editor,lnum,0);
        if (nmatched > 0) {
          lnum+=regmatch.startpos[0].lnum;
          ptr=new CharPointer(EditorHelper.getLineBuffer(editor,lnum));
          startcol=regmatch.startpos[0].col;
          endpos=regmatch.endpos[0];
          if (dir == 1 && at_first_line) {
            match_ok=true;
            while ((startcol - (startcol == ptr.strlen() ? 1 : 0)) < (start_pos.col + extra_col)) {
              if (nmatched > 1) {
                match_ok=false;
                break;
              }
              matchcol=endpos.col;
              if (matchcol == startcol && ptr.charAt(matchcol) != '\u0000') {
                ++matchcol;
              }
              if (ptr.charAt(matchcol) == '\u0000' || (nmatched=sp.vim_regexec_multi(regmatch,editor,lnum,matchcol)) == 0) {
                match_ok=false;
                break;
              }
              startcol=regmatch.startpos[0].col;
              endpos=regmatch.endpos[0];
              ptr=new CharPointer(EditorHelper.getLineBuffer(editor,lnum));
            }
            if (!match_ok) {
              continue;
            }
          }
          if (dir == -1) {
            match_ok=false;
            for (; ; ) {
              if (!at_first_line || (regmatch.startpos[0].col + extra_col <= start_pos.col)) {
                match_ok=true;
                startcol=regmatch.startpos[0].col;
                endpos=regmatch.endpos[0];
              }
 else {
                break;
              }
              if (nmatched > 1) {
                break;
              }
              matchcol=endpos.col;
              if (matchcol == startcol && ptr.charAt(matchcol) != '\u0000') {
                ++matchcol;
              }
              if (ptr.charAt(matchcol) == '\u0000' || (nmatched=sp.vim_regexec_multi(regmatch,editor,lnum,matchcol)) == 0) {
                break;
              }
              ptr=new CharPointer(EditorHelper.getLineBuffer(editor,lnum));
            }
            if (!match_ok) {
              continue;
            }
          }
          pos.lnum=lnum;
          pos.col=startcol;
          endpos.lnum+=first_lnum;
          found=1;
          break;
        }
        if (loop != 0 && lnum == start_pos.lnum) {
          break;
        }
      }
      at_first_line=false;
      if (!p_ws || found != 0) {
        break;
      }
      if (dir == -1) {
        lnum=lineCount - 1;
      }
 else {
        lnum=0;
      }
    }
  }
 while (--count > 0 && found != 0);
  if (found == 0) {
{
      if (p_ws)       MessageHelper.EMSG(Msg.e_patnotf2,lastSearch);
 else       if (lnum <= 0)       MessageHelper.EMSG(Msg.E384,lastSearch);
 else       MessageHelper.EMSG(Msg.E385,lastSearch);
    }
    return null;
  }
  return new TextRange(editor.logicalPositionToOffset(new LogicalPosition(pos.lnum,pos.col)),editor.logicalPositionToOffset(new LogicalPosition(endpos.lnum,endpos.col)));
}

Fixed version (ground truth):
private TextRange findIt(Editor editor,DataContext context,int startOffset,int count,int dir,boolean noSmartCase){
  TextRange res=null;
  if (lastSearch == null || lastSearch.length() == 0) {
    return res;
  }
  RegExp sp;
  RegExp.regmmatch_T regmatch=new RegExp.regmmatch_T();
  regmatch.rmm_ic=shouldIgnoreCase(lastSearch,noSmartCase);
  sp=new RegExp();
  regmatch.regprog=sp.vim_regcomp(lastSearch,1);
  if (regmatch == null) {
    logger.debug("String_Node_Str" + lastSearch);
    return res;
  }
  CharacterPosition lpos=EditorHelper.offsetToCharacterPosition(editor,startOffset);
  RegExp.lpos_T pos=new RegExp.lpos_T();
  pos.lnum=lpos.line;
  pos.col=lpos.column;
  int found;
  int lnum;
  CharPointer ptr=null;
  int matchcol;
  int startcol;
  RegExp.lpos_T endpos=new RegExp.lpos_T();
  int loop;
  RegExp.lpos_T start_pos;
  boolean at_first_line;
  int extra_col=1;
  boolean match_ok;
  long nmatched;
  int first_lnum;
  boolean p_ws=Options.getInstance().isSet("String_Node_Str");
  do {
    start_pos=new RegExp.lpos_T(pos);
    found=0;
    at_first_line=true;
    if (pos.lnum == -1) {
      pos.lnum=0;
      pos.col=0;
      at_first_line=false;
    }
    if (dir == -1 && start_pos.col == 0) {
      lnum=pos.lnum - 1;
      at_first_line=false;
    }
 else {
      lnum=pos.lnum;
    }
    for (loop=0; loop <= 1; ++loop) {
      int lineCount=EditorHelper.getLineCount(editor);
      for (; lnum >= 0 && lnum < lineCount; lnum+=dir, at_first_line=false) {
        first_lnum=lnum;
        nmatched=sp.vim_regexec_multi(regmatch,editor,lnum,0);
        if (nmatched > 0) {
          lnum+=regmatch.startpos[0].lnum;
          ptr=new CharPointer(EditorHelper.getLineBuffer(editor,lnum));
          startcol=regmatch.startpos[0].col;
          endpos=regmatch.endpos[0];
          if (dir == 1 && at_first_line) {
            match_ok=true;
            while ((startcol - (startcol == ptr.strlen() ? 1 : 0)) < (start_pos.col + extra_col)) {
              if (nmatched > 1) {
                match_ok=false;
                break;
              }
              matchcol=endpos.col;
              if (matchcol == startcol && ptr.charAt(matchcol) != '\u0000') {
                ++matchcol;
              }
              if (ptr.charAt(matchcol) == '\u0000' || (nmatched=sp.vim_regexec_multi(regmatch,editor,lnum,matchcol)) == 0) {
                match_ok=false;
                break;
              }
              startcol=regmatch.startpos[0].col;
              endpos=regmatch.endpos[0];
              ptr=new CharPointer(EditorHelper.getLineBuffer(editor,lnum));
            }
            if (!match_ok) {
              continue;
            }
          }
          if (dir == -1) {
            match_ok=false;
            for (; ; ) {
              if (!at_first_line || (regmatch.startpos[0].col + extra_col <= start_pos.col)) {
                match_ok=true;
                startcol=regmatch.startpos[0].col;
                endpos=regmatch.endpos[0];
              }
 else {
                break;
              }
              if (nmatched > 1) {
                break;
              }
              matchcol=endpos.col;
              if (matchcol == startcol && ptr.charAt(matchcol) != '\u0000') {
                ++matchcol;
              }
              if (ptr.charAt(matchcol) == '\u0000' || (nmatched=sp.vim_regexec_multi(regmatch,editor,lnum,matchcol)) == 0) {
                break;
              }
              ptr=new CharPointer(EditorHelper.getLineBuffer(editor,lnum));
            }
            if (!match_ok) {
              continue;
            }
          }
          pos.lnum=lnum;
          pos.col=startcol;
          endpos.lnum+=first_lnum;
          found=1;
          break;
        }
        if (loop != 0 && lnum == start_pos.lnum) {
          break;
        }
      }
      at_first_line=false;
      if (!p_ws || found != 0) {
        break;
      }
      if (dir == -1) {
        lnum=lineCount - 1;
      }
 else {
        lnum=0;
      }
    }
  }
 while (--count > 0 && found != 0);
  if (found == 0) {
{
      if (p_ws)       MessageHelper.EMSG(Msg.e_patnotf2,lastSearch);
 else       if (lnum <= 0)       MessageHelper.EMSG(Msg.E384,lastSearch);
 else       MessageHelper.EMSG(Msg.E385,lastSearch);
    }
    return null;
  }
  return new TextRange(EditorHelper.characterPositionToOffset(editor,new CharacterPosition(pos.lnum,pos.col)),EditorHelper.characterPositionToOffset(editor,new CharacterPosition(endpos.lnum,endpos.col)));
}