Sometimes when you made an action in game that will produce a lot of logs (such /advancement grant @s everything), the launcher just crashes itself.

Steps to Reproduce:

1. Turn on the "Open output log when Minecraft: Java Edition starts" in Settings.
2. Start the game.
3. Run "/advancement grant @s everything" (or a repeating command block with "say hi") in the game and sometimes it will cause the launcher crash.