node-ytdl called from bash prompt is not returning (hanging)

[timbly5000]

I have ytdl 1.3.5 with ytdl-core 3.2.0 installed at home on a Linux Mint 19.2 machine and everything works correctly from the bash command line. ytdl was installed using sudo npm -g install ytdl

I have replicated the same install on a different machine (still Mint 19.2) and this time it has installed ytdl 1.4.0 with ytdl-core 4.1.1

When I run ytdl, it performs the required operation but never returns to the bash prompt. This is apparently a problem encountered by some node.js developers.

Has anyone else experienced this?

I have started debugging ytdl with the built-in node debugger but has not got far yet - the debugger seems to think that ytdl has exited! I have experimented with process.exit() calls within ytdl amd am starting to think the problem is in ytdl-core.

[fent]

ytdl-core uses an internal cache to make less requests. the whole cache needs to be refactored to be more flexible. but this'll do for now.