Your system information

• Steam client version (build number or date): Latest .deb
• Distribution (e.g. Ubuntu): Debian 9.3
• Opted into Steam client beta?: No
• Have you checked for system updates?: Yes

Please describe your issue in as much detail as possible:

I went to open Steam this morning after having it work flawlessly for 3 months, and I received the following output in terminal:

tim@tim-desktop:~$ steam

Setting up Steam content in /home/tim/.local/share/Steam
/usr/bin/xz: 5: /usr/bin/xz: Syntax error: Unterminated quoted string
tar: Child returned status 2
tar: Error is not recoverable: exiting now
Failed to extract /usr/lib/steam/bootstraplinux_ubuntu12_32.tar.xz, aborting installation.

I'm getting the same error after completely removing, purging, and reinstalling from the .deb.

Steps for reproducing this issue:

1. Launch Steam