OpenEuphoria

Re: Compiler crash?

• Posted by Robert Craig <rds at RapidEuphoria.com> Jun 07, 2005
• 510 views

puts(1, c_func(up, {rand("abcdefghijklmnopqrstuv") + ' '}) & '\n')

I've had time to pin it down now.
The bug is caused because the Translator assumes
that c_func() must always return an atom. This used to be true
a few years ago, and is still true if you only call C-coded 
functions in .dlls. However it is possible to call a 
Euphoria-coded function in a .dll, and that function might be one
that returns a sequence. Above, the translator uses this bad assumption 
and produces incorrect code for the concatenation step. 
If you assign the result of c_func() to a variable,
or if your Euphoria function does in fact return an atom, 
there shouldn't be a problem. Also, in the example above,
you could split the statement into two simpler statements. 
In more complicated expressions, bad C code could result. 
I'll fix it for the next release. It's just a one-line change.

Regards,
   Rob Craig
   Rapid Deployment Software
   http://www.RapidEuphoria.com