static void emitlocal(JF, int oploc, int opvar, js_Ast *ident)
{
	int is_arguments = !strcmp(ident->string, "arguments");
	int is_eval = !strcmp(ident->string, "eval");
	int i;

	if (is_arguments) {
		F->lightweight = 0;
		F->arguments = 1;
	}

	checkfutureword(J, F, ident);
	if (F->strict && oploc == OP_SETLOCAL) {
		if (is_arguments)
			jsC_error(J, ident, "'arguments' is read-only in strict mode");
		if (is_eval)
			jsC_error(J, ident, "'eval' is read-only in strict mode");
	}
	if (is_eval)
		js_evalerror(J, "%s:%d: invalid use of 'eval'", J->filename, ident->line);

	i = findlocal(J, F, ident->string);
	if (i < 0) {
		emitstring(J, F, opvar, ident->string);
	} else {
		emit(J, F, oploc);
		emitarg(J, F, i);
	}
}

The product performs operations on a memory buffer, but it reads from or writes to a memory location outside the buffer's intended boundary. This may result in read or write operations on unexpected memory locations that could be linked to other variables, data structures, or internal program data.