1.4.0 Release Candidate 1 (26.1-26.2)

1.4.0 Release Candidate 1

Changes:

• When you switch mappings, and your previous mappings fail to load, the previously active mappings will be used instead of always switching to default mappings. This comes with other stability & robustness improvements to mappings switching.
• Added a /navmappings debug dumpMappingsState sub-command.
• Added a hard-coded warning that the builtin mappings emacs_mac, emacs_windows_linux, and readline are incomplete & not fully accurate emulates of those pieces of software.
• Added a verbose logging mode which promotes TRACE/DEBUG level logs to INFO for inclusion in latest.log in all environments (especially for the vanilla launcher) for easier bug reports. This mode is only enabled if the cmd_delete.allowVerboseLogs JVM argument is set to true.
• Fixed a crash that would occur when exporting or importing sharecodes on Minecraft 26.1.2 or earlier (#24).
• Fixed a bug where exporting builtin mappings' sharecodes would not work outside of a development environment.
• Fixed a bug where custom mappings JSONs that inherited nothing wouldn't load.
• Added support for forcing CMD + Delete not to crash Minecraft on certain fatal exceptions by setting the cmd_delete.forcePreventMinecraftCrashes JVM argument to true. Note that this may allow for undefined behavior and/or illegal states after certain types of failures, so this mode is not recommended for normal use.
• Internal code improvements.

Full changelog: 1.4.0-beta.3+mc26.1...1.4.0-rc.1+mc26.1