assertion failure with template instantiation of forward reference class

[comco]

On Thursday, 29 November 2012 at 01:38:50 UTC, bearophile wrote:
> comco:
>
>> Looks like a bug?
>
> This is what DMD 2.061alpha prints, it doesn't crash:
>
> ...\dmd2\src\phobos\std\range.d(603): Error: static assert  
> "Cannot put a string into a LockingTextWriter"
> ...\dmd2\src\phobos\std\format.d(2349):        instantiated 
> from here: put!(LockingTextWriter, string)
> ...\dmd2\src\phobos\std\format.d(2782):        instantiated 
> from here: formatValue!(LockingTextWriter, TypeInfo_Class, char)
> ...\dmd2\src\phobos\std\format.d(415):        instantiated from 
> here: formatGeneric!(LockingTextWriter, TypeInfo_Class, char)
> ...\dmd2\src\phobos\std\stdio.d(712):        ... (1 
> instantiations, -v to show) ...
> ...\dmd2\src\phobos\std\stdio.d(1618):        instantiated from 
> here: write!(TypeInfo_Class,char)
> test.d(5):        instantiated from here: 
> writeln!(TypeInfo_Class)
>
> Bye,
> bearophile

Nice. Thanks!