Program: 12899
Project: 12899
Buggy source:
/** 
 * Select the best method for a call site among two choices.
 * @param env              The current environment.
 * @param site             The original type from where theselection takes place.
 * @param argtypes         The invocation's value arguments,
 * @param typeargtypes     The invocation's type arguments,
 * @param sym              Proposed new best match.
 * @param bestSoFar        Previously found best match.
 * @param allowBoxing Allow boxing conversions of arguments.
 * @param useVarargs Box trailing arguments into an array for varargs.
 */
@SuppressWarnings("String_Node_Str") Symbol selectBest(Env<AttrContext> env,Type site,List<Type> argtypes,List<Type> typeargtypes,Symbol sym,Symbol bestSoFar,boolean allowBoxing,boolean useVarargs,boolean operator){
  if (sym.kind == ERR || !sym.isInheritedIn(site.tsym,types)) {
    return bestSoFar;
  }
 else   if (useVarargs && (sym.flags() & VARARGS) == 0) {
    return bestSoFar.kind >= ERRONEOUS ? new BadVarargsMethod((ResolveError)bestSoFar) : bestSoFar;
  }
  Assert.check(sym.kind < AMBIGUOUS);
  try {
    Type mt=rawInstantiate(env,site,sym,null,argtypes,typeargtypes,allowBoxing,useVarargs,types.noWarnings);
    if (!operator)     currentResolutionContext.addApplicableCandidate(sym,mt);
  }
 catch (  InapplicableMethodException ex) {
    if (!operator)     currentResolutionContext.addInapplicableCandidate(sym,ex.getDiagnostic());
switch (bestSoFar.kind) {
case ABSENT_MTH:
      return new InapplicableSymbolError(currentResolutionContext);
case WRONG_MTH:
    if (operator)     return bestSoFar;
  bestSoFar=new InapplicableSymbolsError(currentResolutionContext);
default :
return bestSoFar;
}
}
if (!isAccessible(env,site,sym)) {
return (bestSoFar.kind == ABSENT_MTH) ? new AccessError(env,site,sym) : bestSoFar;
}
return (bestSoFar.kind > AMBIGUOUS) ? sym : mostSpecific(argtypes,sym,bestSoFar,env,site,allowBoxing && operator,useVarargs);
}

Fixed version (ground truth):
/** 
 * Select the best method for a call site among two choices.
 * @param env              The current environment.
 * @param site             The original type from where theselection takes place.
 * @param argtypes         The invocation's value arguments,
 * @param typeargtypes     The invocation's type arguments,
 * @param sym              Proposed new best match.
 * @param bestSoFar        Previously found best match.
 * @param allowBoxing Allow boxing conversions of arguments.
 * @param useVarargs Box trailing arguments into an array for varargs.
 */
@SuppressWarnings("String_Node_Str") Symbol selectBest(Env<AttrContext> env,Type site,List<Type> argtypes,List<Type> typeargtypes,Symbol sym,Symbol bestSoFar,boolean allowBoxing,boolean useVarargs,boolean operator){
  if (sym.kind == ERR || !sym.isInheritedIn(site.tsym,types)) {
    return bestSoFar;
  }
 else   if (useVarargs && (sym.flags() & VARARGS) == 0) {
    return bestSoFar.kind >= ERRONEOUS ? new BadVarargsMethod((ResolveError)bestSoFar) : bestSoFar;
  }
  Assert.check(sym.kind < AMBIGUOUS);
  try {
    Type mt=rawInstantiate(env,site,sym,null,argtypes,typeargtypes,allowBoxing,useVarargs,types.noWarnings);
    if (!operator || verboseResolutionMode.contains(VerboseResolutionMode.PREDEF))     currentResolutionContext.addApplicableCandidate(sym,mt);
  }
 catch (  InapplicableMethodException ex) {
    if (!operator)     currentResolutionContext.addInapplicableCandidate(sym,ex.getDiagnostic());
switch (bestSoFar.kind) {
case ABSENT_MTH:
      return new InapplicableSymbolError(currentResolutionContext);
case WRONG_MTH:
    if (operator)     return bestSoFar;
  bestSoFar=new InapplicableSymbolsError(currentResolutionContext);
default :
return bestSoFar;
}
}
if (!isAccessible(env,site,sym)) {
return (bestSoFar.kind == ABSENT_MTH) ? new AccessError(env,site,sym) : bestSoFar;
}
return (bestSoFar.kind > AMBIGUOUS) ? sym : mostSpecific(argtypes,sym,bestSoFar,env,site,allowBoxing && operator,useVarargs);
}