Got compiler crash in Mangler::mangleFuncType

[Uranuz via Digitalmars-d]

On Saturday, 25 March 2017 at 07:57:11 UTC, Stefan Koch wrote:
> On Saturday, 25 March 2017 at 06:56:40 UTC, Uranuz wrote:
>> After changes in my project tried to compile, but compiler 
>> failed. Running dmd under GDB gives the following:
>> Program received signal SIGSEGV, Segmentation fault.
>> 0x00000000005807a0 in Mangler::mangleFuncType(TypeFunction*, 
>> TypeFunction*, unsigned char, Type*) ()
>>
>> Could someone give me adivice how to investigate and maybe fix 
>> this problem?
>
> Switch to git ~master and see if it still occurs.
> Also if you can share the source I am happy to debug this.

I just put debug messages on every `assert` and figured out it 
fails on lines:
                     bool implicit0 = (f.next.ty == Tvoid && 
isMain());
                     Type tret = implicit0 ? Type.tint32 : f.next;
                     assert(tret.ty != Tvoid);
                     if (vresult || returnLabel)
                         buildResultVar(scout ? scout : sc2, tret);
I really don't understand what it is... Now I cannot share 
codebase easily. Seems that it fails on my programme `main` 
function or near that, because compiler stack not so deep. There 
is some check for isMain AFAIK... What is this about?