Function removelastlineinfo

3rd/lua-5.4.3/src/lcode.c:352–364

** Remove line information from the last instruction. ** If line information for that instruction is absolute, set 'iwthabs' ** above its max to force the new (replacing) instruction to have ** absolute line info, too. */

** absolute line info, too.
*/
static void removelastlineinfo (FuncState *fs) {
  Proto *f = fs->f;
  int pc = fs->pc - 1;  /* last instruction coded */
  if (f->lineinfo[pc] != ABSLINEINFO) {  /* relative line info? */
    fs->previousline -= f->lineinfo[pc];  /* correct last line saved */
    fs->iwthabs--;  /* undo previous increment */
  }
  else {  /* absolute line information */
    lua_assert(f->abslineinfo[fs->nabslineinfo - 1].pc == pc);
    fs->nabslineinfo--;  /* remove it */
    fs->iwthabs = MAXIWTHABS + 1;  /* force next line info to be absolute */
  }
}


/*