I've a couple of big sketches (custom board and platform files...) which crashes the builder on second run. I have to close and restart the IDE to rebuild it.
Here the java crash log... please tell me if you need more :

panic: runtime error: index out of range

goroutine 1 [running]:
panic(0x556bc0, 0xc420010140)
/home/jenkins/go/src/runtime/panic.go:500 +0x1a1
arduino.cc/builder.findIncludesUntilDone(0xc420034c00, 0xc4203823f0, 0x556f40, 0xc42039b4a0, 0xc4202840d4, 0x10, 0x0, 0x0)
/home/jenkins/workspace/arduino-builder-all-cross/src/arduino.cc/builder/container_find_includes.go:321 +0x138f
arduino.cc/builder.(*ContainerFindIncludes).Run(0x64d248, 0xc420034c00, 0x41bc3c3c, 0x0)
/home/jenkins/workspace/arduino-builder-all-cross/src/arduino.cc/builder/container_find_includes.go:149 +0x5e4
arduino.cc/builder.runCommands(0xc420034c00, 0xc420473ae8, 0x22, 0x22, 0x1, 0x0, 0x0)
/home/jenkins/workspace/arduino-builder-all-cross/src/arduino.cc/builder/builder.go:191 +0xcd
arduino.cc/builder.(*Builder).Run(0xc420473d38, 0xc420034c00, 0xc420045d88, 0x562240)
/home/jenkins/workspace/arduino-builder-all-cross/src/arduino.cc/builder/builder.go:124 +0xb9c
arduino.cc/builder.RunBuilder(0xc420034c00, 0xc420045d88, 0x64d248)
/home/jenkins/workspace/arduino-builder-all-cross/src/arduino.cc/builder/builder.go:222 +0x35
main.main()
/home/jenkins/workspace/arduino-builder-all-cross/src/arduino.cc/arduino-builder/main.go:338 +0x99c
/home/massimo/Documenti/Elettronica/ARDUINO/arduino-1.8.3/arduino-builder ha restituito 2
Errore durante la compilazione per la scheda Fishino32.