Crashes on receipt of files with "invalid" characters

[PsypherPunk]

Firstly: wonderful tool—thank you!

I ran into an issue wherein the Android (Pixel 2 XL, Android 11) app. will crash when receiving a file with a : in the filename.

• using magic-wormhole==0.12.0 on a Linux machine.
• run wormhole send <filename_with_colon> and copy the code.
• enter code into the Android app. and acknowledge receipt.
• download progresses for the full duration but the app. crashes (no errors, just closes) on completion.

My assumption is that it's something to do with the restricted range of characters on the Android end.

Removing the : from the filename and retrying fixes the issue and it can be received without issue.