zsm4 exits / crashes on typo in source code

[dontyetknowmyusername]

When the source contains one of the following typos (probably more, but haven't tested), then zsm4 does the strangest kind of things (i.e. crashing, exiting without compiling, writing its name in an endloss loop etc.) :

A>type test.mac
        .z180

        out0    (66h)
        out0    66

        end

When the instructions are typed correctly, then everything works out fine.

Tested with zsm4 v4.7 on an actual Z180-Computer and in a z80-emulator.