Cryptic error message

[bradunov]

I have a function
fun comp cca(energy_threshold : int32) { ... }
which returns some struct (struct CCAParams).
And I call it in
read >>> cca(200) >>> write.
The problem here is that I haven't bound the return type, so I essentially have to write
read >>> {cca(200); return()} >>> write
to do this. But the actual error message for this is very uninformative:
GenericError "CodeGen: Unbound struct type "CCAParams" detected!\nBound are: ["complex16","complex32","complex64","complex8"

[dimitriv]

Ok the error message is quite uninformative (at the code generation, which is way too late), so I will fix that. Something that is puzzling for me is: why you did not define CCAParams at the top level and you chose instead to make a local struct definition?

[bradunov]

We looked into it and decided it is still a bug. It is checked in as struct4.wpl in tests/backend, though it is made to pass. One only needs to uncomment one line to reproduce the bug.