int first_column; /* 1-based first column, or 0 if none. */
int last_column; /* 1-based exclusive last column (0=none). */
char *text; /* Error text. */
int first_column; /* 1-based first column, or 0 if none. */
int last_column; /* 1-based exclusive last column (0=none). */
char *text; /* Error text. */