[MC-135509] Force JVM crash doesn't work with left control, only right

18w30a added support for forcing a JVM crash with Control+F3+C. However, this doesn't appear to actually work; holding left control and pressing F3+C never triggers the countdown, and pressing control after the countdown starts just causes a regular crash.

Curiously, right control works, for unknown reasons; the code uses GuiScreen.isCtrlKeyDown which checks both left and right. It's not related to keybindings, as it happens even if sprint is rebound to another key.

Linked issues

relates to 1

MC-135510 Force JVM crash fails to crash the JVM when LWJGL is in debug mode, instead merely crashing the game Resolved

Comments 3

Runemoro 2018-08-09T11:55:01Z

The Crtl-F3-C key combination doesn't work on all keyboards. This seems to be a keyboard limitation, and not a Minecraft bug. Try checking if you're able to press all three keys at the same time using this tool: http://keyboardchecker.com/. I'm not.

pokechu22 2018-08-09T16:52:12Z

Aha, yeah, that's it!

In my case, Ctrl+F3+C does not trigger, nor does D/E/3 (which are all above it if the keyboard weren't slanted). The rest of the keys all do. And right-control just doesn't have that limitation.

pokechu22 2018-08-09T18:29:37Z

Yeah, thinking about it this is invalid since it is a keyboard issue (the only workaround they could do would be to change the keys, but that's also awkward and could have problems too; and that'd be a feature request mostly).