Description:
EIDE updated to latest version (3.26.0), -> switched to yml to store project config.
Builder configuration set to GNU ARM toolchain (GCC)
- target: Cortex-M3
- Build works fine.
Builder configuration switched to Generic GNU toolchain (ANY_GCC)
- ANY_GCC entry created in eide.yml, but
- build cant started: no any EIDE log entry, no artifacts created (builder.params, compile_commands.json ...) in build output folder, an error message pops up:

"Syntax error: "undefined" is not valid JSON"
- Any subsequent push to build leads to a warning message "Warning: build busy!, please wait!" Switching back to Arm GNU toolchain also not heals this state, the above warning pops up, until VS Code restart.
After code restart, the build works again if ARM toolchain selected before restart.