From @AlexDaniel

This problem is well known, but maybe this bug report will help to
coordinate efforts.

For example, sometimes you may get an error like this (borrowed from RT
126832)​:

The spawned process exited unsuccessfully (exit code​: 1) in sub
run-and-gather-output at
/home/zoffix/.rakudobrew/moar-nom/install/share/perl6/site/sources/C27BE995DC18074CA8F64980F69FEB80BADF5619​:86
in block at
/home/zoffix/.rakudobrew/moar-nom/install/share/perl6/site/sources/A40B6CBA2E85D9DAA45064316EBEB9E42B0036E1​:24
in sub indir at
/home/zoffix/.rakudobrew/moar-nom/install/share/perl6/site/sources/C27BE995DC18074CA8F64980F69FEB80BADF5619​:20
in method test at
/home/zoffix/.rakudobrew/moar-nom/install/share/perl6/site/sources/A40B6CBA2E85D9DAA45064316EBEB9E42B0036E1​:5
in method install at
/home/zoffix/.rakudobrew/moar-nom/install/share/perl6/site/sources/1BC9777EC40C29C8331437E926CD4C13B983C026​:141
in method resolve at
/home/zoffix/.rakudobrew/moar-nom/install/share/perl6/site/sources/1BC9777EC40C29C8331437E926CD4C13B983C026​:219
in sub MAIN at
/home/zoffix/.rakudobrew/moar-nom/install/share/perl6/site/resources/9FF75FC978A3556E531F982825B3EDBBBA834D9E​:18
in block <unit> at
/home/zoffix/.rakudobrew/moar-nom/install/share/perl6/site/resources/9FF75FC978A3556E531F982825B3EDBBBA834D9E​:145

Trying to figure out what is happening here is pretty hard. Basically you
have to open each file to see what's inside. I wish these files had regular
filenames.

That being said, I think that precompilation is way more important than
readable stacktraces. But let's have both.

From @MadcapJake

I also agree that this renders the stacktraces basically useless. Here's a
stack that Bailador gives me​:

Too many positionals passed; expected 3 arguments but got 4
  in method render at
/home/jrusso/.rakudobrew/moar-nom/install/share/perl6/site/sources/A2E027789F0B4D3B6A5FCF168DAB702F10B504BF
line 140
  in method render at
/home/jrusso/.rakudobrew/moar-nom/install/share/perl6/site/sources/B984C8E09D6795857F86A9BB5741E86B0D43B909
line 8
  in method template at
/home/jrusso/.rakudobrew/moar-nom/install/share/perl6/site/sources/6FBB546BBE02E85FD75F4092B80DFBB2DA9640D3
line 14
  in sub template at
/home/jrusso/.rakudobrew/moar-nom/install/share/perl6/site/sources/17D4C22BDB2EA965DE7C0978F62C8F7CEC529FA0
line 120
  in sub at app.pl6 line 9

Which could be much better written using the module name and the module
file name, e.g.,

Too many positionals passed; expected 3 arguments but got 4
  in method render at Template​::Mustache/Mustache.pm line 140
  in method render at Bailador​::Template​::Mustache/Mustache.pm line 8
  in method template at Bailador​::App/Template.pm line 14
  in sub template at Bailador/Bailador.pm line 120
  in sub at app.pl6 line 9

I think this is a critical issue to address.

The RT System itself - Status changed from 'new' to 'open'

From @niner

This should be resolved since we nowadays add the requested module name (what's been use'd) to the plain file name in stacktraces.

@niner - Status changed from 'open' to 'resolved'