Sorry for the crash with Magnetic Lasso and Photoshop CC 2018.
This is a bug that should be fixed in the 19.1.1 update.
More info on this fix and other fixes included in the 19.1.1 update here: Fixed issues in Adobe Photoshop CC
To update: Look at the Creative Cloud desktop application for the update to Photoshop and install that.
That should get you back up and running without the crash.
For background, this crash would happen when using the Magnetic lasso in addition to using the Precise cursor (activated either by Caps Lock being on, or Precise cursor set in Photoshop's Preferences > Cursors).
Let us know if the update fixes it for you.
1 person found this helpful
Thank you. I didn't think to look for the update. That corrected it, thanks!
Great to hear. Thanks for returning to the discussion to let us know you're all set!