Crash when building BBOS

[MadMockers]

Master crashes when building BBOS

$ dasm bbos.asm bbos.bin
Outputing to bbos.bin
Loading bbos.asm included in -None-
Loading bbos.inc.asm included in bbos.asm
Loading video.asm included in bbos.asm
Loading drives.asm included in bbos.asm
Loading drives/m35fd.asm included in drives.asm
Loading keyboard.asm included in bbos.asm
Loading rtc.asm included in bbos.asm
Loading comms.asm included in bbos.asm
Flags: 0
terminate called after throwing an instance of 'std::bad_alloc'
  what():  std::bad_alloc
Aborted

This appears to have been introduced in 6c1414d