There was no crash report and the following is all that was in the game output log:

12:57:25 launcher Preparing to launch minecraft client for 17w43a
12:57:25 launcher Checking installations.
12:57:25 launcher Minecraft client 17w43a is ready to start.
12:57:25 launcher Starting!
12:57:25 launcher Using default game log configuration client-1.12.xml (outputs XML)

Unfortunately that's all the information I have about the crash. If I find anything else I'll edit my report with the new information.