strtok ()core dump

当　char* message="$GPGSV,2,1,07,07,79,048,42,02,51,062,43,26,36,256,42,27,138,42*71";

parse(message);就会core dump;
如果　
char message[]="$GPGSV,2,1,07,07,79,048,42,02,51,062,43,26,36,256,42,27,138,42*71";
就正常了。+

void parse( char* message )
{
  char *pch;
  //char *message1="hello-world";

  printf( "can parse\n" );
  pch = strtok( message,",*");
  printf( "over" );

  while( pch != NULL ){
    printf( "%s\n", pch);
    pch= strtok( NULL ,",*");
  }

}