invalid input pool[7] uint ids; crashes the compiler

[jhoehle]

Even though the input is invalid, the compiler ought to produce a meaningful error message, not a backtrace and internal bug:

C:\...\Documents\Céu-0.40\examples\pico-ceu\dist>..\..\..\run\lua53.exe
 ..\..\..\run\ceu.lua --pre --pre-input=..\bug-pool.ceu --ceu --ceu-features-pool=true
stack traceback:
        ..\..\..\run\ceu.lua:3943: in field 'asr'
        [... duplicate output elided, see below ...]
        ..\..\..\run\ceu.lua:7542: in main chunk
        [C]: in ?
..\..\..\run\lua53.exe: ..\..\..\run\ceu.lua:3944: bug (expected: ID_abs | found: ID_prim)
stack traceback:
        [C]: in function 'error'
        ..\..\..\run\ceu.lua:3944: in field 'asr'
        ..\..\..\run\ceu.lua:6910: in local 'mid'
        ..\..\..\run\ceu.lua:4159: in upvalue 'visit_aux'
        ..\..\..\run\ceu.lua:4153: in upvalue 'visit_aux'
        ..\..\..\run\ceu.lua:4197: in function <..\..\..\run\ceu.lua:4194>
        (...tail calls...)
        ..\..\..\run\ceu.lua:4153: in upvalue 'visit_aux'
        ..\..\..\run\ceu.lua:4153: in upvalue 'visit_aux'
        ..\..\..\run\ceu.lua:4153: in upvalue 'visit_aux'
        ..\..\..\run\ceu.lua:4153: in upvalue 'visit_aux'
        ..\..\..\run\ceu.lua:4153: in upvalue 'visit_aux'
        ..\..\..\run\ceu.lua:4153: in upvalue 'visit_aux'
        ..\..\..\run\ceu.lua:4153: in function <..\..\..\run\ceu.lua:4122>
        (...tail calls...)
        ..\..\..\run\ceu.lua:7542: in main chunk
        [C]: in ?

I'm using the downloaded pre-0.40 Céu binary package on MS-Windows 7. bug-pool.ceu contains solely pool[7] uint ids;

BTW, somehow another bug is that the backtrace is shown twice, isnt'it?

[fsantanna]

Sure, this is a bug.