finding a circular dependency

[Steven Schveighoffer]

On Thu, 24 Jun 2010 10:27:29 -0400, Ellery Newcomer  
<ellery-newcomer at utulsa.edu> wrote:

> On 06/21/2010 01:51 PM, Steven Schveighoffer wrote:
>> I've been trying to get a modified version of std.process to compile
>> (with Lars K's changes) for windows, and phobos finally compiled.
>>
>> So I built a little test program, compiled it, and I get the following
>> error message:
>>
>> object.Exception: circular dependency in module std.stdio.
>>
>> Great. How did that happen? Being that I didn't write std.stdio, only
>> modified it slightly (and certainly didn't change any imports), I
>> haven't the foggiest where this problem is. Given that the runtime can
>> prove there is a circular dependency, and apparently knows the names of
>> the modules, how about showing me the cycle?
>>
>> :P
>>
>> I do not look forward to tracking this one down...
>>
>> -Steve
>
>
> Hey Steve, if you haven't found your cycle yet, could you send me the  
> source code? My utility is a bit of a mess, but I think it's working now.

I did find it, and I will eventually incorporate my code which prints the  
cycle when it's found (it will be completely non-intrusive and not affect  
the startup performance unless a cycle is found).  However, in trying to  
print the cycle, I've found a really disturbing bug that needs to be  
addressed first http://d.puremagic.com/issues/show_bug.cgi?id=4384

Also, equally disappointing, I found that the reason the cycle was added  
was to workaround a bug in dmd (specifically  
http://d.puremagic.com/issues/show_bug.cgi?id=3979).  Without the code  
that creates the cycle, phobos doesn't compile.  With the code, any  
program linked with phobos fails.  Lovely...

Great, I just gave myself more work when I was trying to just finish  
std.process!

-Steve