Dustmite and linking error

[JG]

On Friday, 3 September 2021 at 19:56:30 UTC, JG wrote:
> On Thursday, 2 September 2021 at 17:56:54 UTC, Vladimir 
> Panteleev wrote:
>> On Thursday, 2 September 2021 at 11:20:18 UTC, Vladimir 
>> Panteleev wrote:
>>> One way to get a very rough estimate is to take the square of 
>>> the current reduction (.reduced directory), and divide it by 
>>> the square of the original source.
>>
>> I meant the square of the size of the respective directory. 
>> (bytes / LOC / SLOC...)
>>
>>>> One week later it is still running (depth 22).
>>
>> If you are still on the first iteration, you may also try 
>> switching to the "careful" strategy.
>
> Thanks for the information.
>
> I stopped dustMite and realized I must have done something 
> wrong since the reduced test case doesn't reproduce the problem.
>
> I would really like to try and produce a reduced test case of 
> this problem. However having spent three or four hours trying 
> to figure out what I am doing wrong I think I will have to stop 
> at this point.

I tried again. What am I doing wrong?

cp source ~/tmp/source
cd ~/tmp/source
dub build --config prog1 2>&1 | grep "collect2: error: ld 
returned 1 exit status"
echo $? #produces 0
find . -name *.o -delete
~/d/DustMite/dustmite -j ./ 'dub build --config prog1 2>&1 | grep 
"collect2: error: ld returned 1 exit status"'
cd ../source.reduced
dub build --config prog1 2>&1 | grep "collect2: error: ld 
returned 1 exit status"
echo $? #produces 1