The "options.agent" property must be one of type Agent-like Object, undefined, or false.

When I try to install minecraft jar with @xmcl/installer, I get the following error but not all the times:

GotError: The "options.agent" property must be one of type Agent-like Object, undefined, or false. Received type object

I only get this error in a linux environment (which is sandboxed in a docker environment) or when I test my launcher with spectron which is also sandboxed.

My guess is that it has something to do with these lines: https://github.com/Voxelum/minecraft-launcher-core-node/blob/a034fba5c1f6c04afe06f36f29f1dc132c1f5a95/packages/installer/util.ts#L92-L102 However, when I do the following, I don’t get any error:

const got = require("got")
const HttpAgent = require("agentkeepalive")
const { HttpsAgent } = HttpAgent;

await got("https://www.google.com", {
    agent: {
        http: new HttpAgent(),
        https: new HttpsAgent()
    }
).text();

But if I replace https: new HttpsAgent() with https: new Object(), I get the same error. There must be some conditional agent in the code that I am not aware of that is causing this issue.

[lukechu10]

Sorry for so many comments but in fact, it turns out that the task install.installVersion hangs if the version folder exists and the version json file exists but is empty.

In fact, this issue was caused by another one: https://github.com/electron/electron/issues/22119. I am still going to leave this issue open because they seem like two different problems.

[ci010]

That might be a problem of compatibility of sandbox… but I cannot come up a reason…

The error

The “options.agent” property must be one of type Agent-like Object, undefined, or false. Received type object

is actually thrown by nodejs not got.

I don’t think I swap the agent by condition in my code… at least I don’t remember I have a conditional agent. So it might be a problem of got.

The only place to swap agent in got is here. Maybe you can place some breakpoint there to debug? (Or modify the js file in node_modules and print…)