"Go to line number" doesn't work

"Go to line number" in the code editor doesn't work. Steps to reproduce:

1. Open a source file in the code editor (C++ file in my case).
2. Press Ctrl+G (or the other shortcut to invoke "go to line number"). Alternatively, click on the navigation field in the bottom left and type "l ".
3. Type a line number in range of the opened file and press Enter.

Actual result:

After pressing Enter nothing happens.

Expected result:

After pressing Enter the cursor should move to the specified line.

This is a regression in 12.0.0 beta1 (works in 11.0.3).