Program exited with code -11

[Charles Hawkins via Digitalmars-d-learn]

On Tuesday, 23 June 2015 at 07:25:05 UTC, Baz wrote:
> On Tuesday, 23 June 2015 at 06:50:28 UTC, Charles Hawkins wrote:
>> On Tuesday, 23 June 2015 at 03:31:37 UTC, weaselcat wrote:
>>> On Tuesday, 23 June 2015 at 03:29:14 UTC, Charles Hawkins 
>>> wrote:
>>>> Thanks, Adam.  I'm coming from OCaml and haven't seen a seg 
>>>> fault in years.  Didn't recognize it. :D  Hopefully I can 
>>>> figure it out from here.
>>>
>>> Try to compile with either ldc or gdc and the -g flag, it 
>>> should give you a backtrace. dmd seems to not like linux wrt 
>>> backtraces.
>>
>> Thanks.  I wish!  I haven't had any success in compiling with 
>> anything but dub.  gdc, dmd, rdmd always give me "module mylib 
>> is in file 'mylib.d' which cannot be read" on my "import 
>> mylib;" statement.  I've tried every permutation of -I and -L 
>> that I can think of.  It almost appears that one either uses 
>> dub for everything or nothing and I'm getting pretty 
>> frustrated with it as well.  Perhaps I should just go back to 
>> old-fashioned make files?
>
> in dmd you have to pass
> - the .lib/.a files a source
> - the path to the lib source with '-I'. Sometimes when the path 
> is not well indicated you get the error you talk about. This is 
> because the '-I' path must follow carefully the structure of 
> the lib, e.g
>
> 'import myLib.package.moduleThis':
> the '-I' must point to the folder that contains the folder 
> 'myLib'.

Sigh.  I'm probably doing something stupid.  I tried full paths:
dmd -I+/home/charles/projects/d/mylib/source/mylib/ myprog.d 
/home/charles/projects/d/mylib/build/libmylib.a
Same result.
myprog.d(4) Error: module mylib is in file 'mylib.d' which cannot 
be read
Statement in myprog is:
import mylib;

I used tab expansion so I'm confident everything is spelled 
correctly.  Since dub will compile it, I also tried copying and 
pasting its entry from the local packages file (leaves off the 
"source/mylib/").  Is there a way to find out what command dub is 
passing to dmd?