calling INT with float bounds results in a crash

[mzuenni]

According to the spec this should be a valid program (even though kind of weird):

INT(-0.5, 0.5) NEWLINE

But I get:

terminate called after throwing an instance of 'boost::wrapexcept<boost::bad_get>'
  what():  boost::bad_get: failed value get using boost::get

[mzuenni]

Using a float, or a string as an array index also seems to crash:

SET(a[1.0]=1)

SET(a[""]=1)