[Bug lto/82302] New: LTO producing bad code

[krzysio.kurek at wp dot pl]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=82302

            Bug ID: 82302
           Summary: LTO producing bad code
           Product: gcc
           Version: 7.2.0
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: lto
          Assignee: unassigned at gcc dot gnu.org
          Reporter: krzysio.kurek at wp dot pl
                CC: marxin at gcc dot gnu.org
  Target Milestone: ---

I've found a repository with code which upon compilation with -flto under GCC7
creates a softlock. Works fine on GCC6.
Here's a fork of the repo:
https://github.com/kiroma/MineCraft-One-Week-Challenge
It's made so that cmake defaults to a build configuration with -flto enabled.
On GCC6 the program will output to the console:

Attempting to load chunk
Finished loading chunk, all clear!
Spawn found! Attempts: x Time Taken: y seconds

On GCC7 it will print:

Attempting to load chunk

but will not proceed.