SyntaxError: Missing catch or finally after try

[ab2103]

Code :-

const ytdl = require('ytdl-core');

ytdl.getInfo('http://www.youtube.com/watch?v=aqz-KE-bpKQ')
.then( d => console.log(d))
.catch(e => console.error(e));

Expected Behaviour
log the video info

Ouptut on Console

evalmachine.<anonymous>:24
c[72],c[6]),(0,c[85])(c[11]),(0,c[41])(c[39],c[28],(0,c[66])()),(0,c[78])(c[Math.pow(6,2)+122+-119],c[new Date("Wednesday December 31 1969 19:00:14 CDT")/1E3])}catch(d){(0<c[0]||(((0,c[80])(c[60],c[88]),c[80])(c[21],c[88]),0))&&(0,c[17])((0,c[70])(c[6]),c[78],c[88],c[12])}try{2<c[91]&&(1<c[53]?(0,c[17])((0,c[80])(c[82],c[6]),c[78],c[39],c[5]):((0,c[45])(c[49],c[88]),c[78])(c[88],c[86])),(0,c[17])((0,c[85])(c[31]),c[41],c[88],c[75],(0,c[35])())}catch(d){}};Wka(ncode);
                                                                                                                                                                                                                                                                                                                                                                                                                                                                          ^

SyntaxError: Missing catch or finally after try
    at new Script (node:vm:100:7)
    at exports.decipherFormats (/storage/emulated/0/c/ytdl/node_modules/ytdl-core/lib/sig.js:116:51)
    at process.processTicksAndRejections (node:internal/process/task_queues:95:5)
    at async Promise.all (index 0)
    at async exports.getInfo (/storage/emulated/0/c/ytdl/node_modules/ytdl-core/lib/info.js:401:17)

Node.js v18.7.0

[bwees]

This is also happening to me. Not sure what the issue is?

[davidgalarza]

I'm facing the same issue

[bwees]

Rolling back to 4.10.0 fixes problem for me

[davidgalarza]

@bwees I can confirm that downgrading to version 4.10.0 fixes the issue, but in my case the download speed decrease a lot.
(6 minutes to download a 2 minutes video with a good internet connection).

[Zowlyfon]

I've debugged the issue, it is thrown by this line

node-ytdl-core/lib/sig.js

Line 116 in 11103be

const nTransformScript = functions.length > 1 ? new vm.Script(functions[1]) : null;

The issue stems from somewhere in this function

node-ytdl-core/lib/sig.js

Lines 33 to 73 in 11103be

	exports.extractFunctions = body => {
	const functions = [];
	const extractManipulations = caller => {
	const functionName = utils.between(caller, `a=a.split("");`, `.`);
	if (!functionName) return '';
	const functionStart = `var ${functionName}={`;
	const ndx = body.indexOf(functionStart);
	if (ndx < 0) return '';
	const subBody = body.slice(ndx + functionStart.length - 1);
	return `var ${functionName}=${utils.cutAfterJSON(subBody)}`;
	};
	const extractDecipher = () => {
	const functionName = utils.between(body, `a.set("alr","yes");c&&(c=`, `(decodeURIC`);
	if (functionName && functionName.length) {
	const functionStart = `${functionName}=function(a)`;
	const ndx = body.indexOf(functionStart);
	if (ndx >= 0) {
	const subBody = body.slice(ndx + functionStart.length);
	let functionBody = `var ${functionStart}${utils.cutAfterJSON(subBody)}`;
	functionBody = `${extractManipulations(functionBody)};${functionBody};${functionName}(sig);`;
	functions.push(functionBody);
	}
	}
	};
	const extractNCode = () => {
	let functionName = utils.between(body, `&&(b=a.get("n"))&&(b=`, `(b)`);
	if (functionName.includes('[')) functionName = utils.between(body, `${functionName.split('[')[0]}=[`, `]`);
	if (functionName && functionName.length) {
	const functionStart = `${functionName}=function(a)`;
	const ndx = body.indexOf(functionStart);
	if (ndx >= 0) {
	const subBody = body.slice(ndx + functionStart.length);
	const functionBody = `var ${functionStart}${utils.cutAfterJSON(subBody)};${functionName}(ncode);`;
	functions.push(functionBody);
	}
	}
	};
	extractDecipher();
	extractNCode();
	return functions;
	};

Which appears to be transforming some compiled javascript code from youtube's html5 player, the transformed code seems to have illegal syntax.

I can confirm 4.10.0 is working for me

[larahfelipe]

Same problem here guys. Worked after rolling back to 4.10.10 here as well, but the download speed seems to have decreased a lot, not sure why. Anyway, guess we'll have to wait for further updates.

[770grappenmaker]

When replacing the line in onError calling console.error with console.trace, I was able to determine the code yielded by youtube that was invalid. This is what it looks like:

Trace: evalmachine.<anonymous>:24
c[72],c[6]),(0,c[85])(c[11]),(0,c[41])(c[39],c[28],(0,c[66])()),(0,c[78])(c[Math.pow(6,2)+122+-119],c[new Date("Wednesday December 31 1969 19:00:14 CDT")/1E3])}catch(d){(0<c[0]||(((0,c[80])(c[60],c[88]),c[80])(c[21],c[88]),0))&&(0,c[17])((0,c[70])(c[6]),c[78],c[88],c[12])}try{2<c[91]&&(1<c[53]?(0,c[17])((0,c[80])(c[82],c[6]),c[78],c[39],c[5]):((0,c[45])(c[49],c[88]),c[78])(c[88],c[86])),(0,c[17])((0,c[85])(c[31]),c[41],c[88],c[75],(0,c[35])())}catch(d){}};Wka(ncode);
                                                                                                                                                                                                                                                                                                                                                                                                                                                                          ^

SyntaxError: Missing catch or finally after try
    at new Script (node:vm:100:7)
    at Object.exports.decipherFormats (\AppData\Roaming\npm\node_modules\ytdl\node_modules\ytdl-core\lib\sig.js:116:51)
    at runMicrotasks (<anonymous>)
    at processTicksAndRejections (node:internal/process/task_queues:96:5)
    at async Promise.all (index 0)
    at async exports.getInfo (\AppData\Roaming\npm\node_modules\ytdl\node_modules\ytdl-core\lib\info.js:401:17)
    at onError (C:\Users\Koen\AppData\Roaming\npm\node_modules\ytdl\bin\ytdl.js:92:11)
    at runMicrotasks (<anonymous>)
    at processTicksAndRejections (node:internal/process/task_queues:96:5)

[ArjhanToteck]

Same issue for me

[dskaiser82]

PR for the Fix but missing "Maintainer approval"
Also @greepSheep did a Fork with the Fix...you can see his fork in the PR below

PR: #1111

[blrbrb]

I've been having the exact same issue for some time now since around Friday. I thought it might have been an issue with the library so deleted the node-modules folder, and rebuilt. Still persisted. Re-installed my entire project on windows, same issue.

Edit: temp. fix works 👍

[gatecrasher777]

Currently, the code traverses the base.js n transform function to extract it in full. But it gets tripped up with the inclusion of regular expressions, strings and possibly try-catch loops that include function closing braces, causing the process to short circuit.

The fix identifies the start of the function and the end of the function and simply extracts everything in between.