strange error in expression loop. any ideas?

Expression loops through a series of effects by name: line1, line2, line3, line4, line5. 

Getting an error at i=6, which should not be possible based on the loop's break conditions. Any ideas?

// loop through the lnes
for ( i=1; 1<=5; i++ ) {
	lineName = "line" + i;
	lineEmojiEffect = emojiComp.effect(lineName)("3D Point");
	lineEmojis = [ parseInt(lineEmojiEffect[0]),  parseInt(lineEmojiEffect[1]), parseInt(lineEmojiEffect[2]) ];
	if (emojiNum in lineEmojis) {
		lineNum = i;
		printY =  thisComp.layer("line"+lineNum).transform.position[1];
	} else {
		printY = 0;
	}
}