simplify_alloc doesn't support nested clases

[chrisseaton]

(m = /^(\w+(?:\[\])?)\[([0-9,]+)\]$/.match(value)) || raise(value)

Doesn't match for example Foo$Bar.

Should it just be:

(m = /^([\w\$]+(?:\[\])?)\[([0-9,]+)\]$/.match(value)) || raise(value)

Also raising with a better error message would be better.

@eregon

[nirvdrum]

Fixed by #73.