[erlang-questions] int:find_src/2, shell:try_source/2 ignore the obvious place to find source files?

[Roger Lipscombe]

When compiling some Erlang source files with mix, I discovered that it
leaves out the abstract_code chunk.

This means that rr(Mod) -- implemented in shell:read_file_records/2 --
falls through to shell:try_source/2, which looks in the "CInf" chunk. It
then uses the 'options'.'outdir' value and attempts to recreate the source
path from that.

That is: given the following:

[{options, [{outdir, "/home/roger/Source/foo/bar/_build/dev/lib/baz/ebin"},
           {i,"include"}]},
 {version,"7.0.4"},
 {source,"/home/roger/Source/foo/bar/baz/src/quux.erl"}]

...it'll look for
"/home/roger/Source/foo/bar/_build/dev/lib/baz/ebin/quux.erl" and
"/home/roger/Source/foo/bar/_build/dev/lib/baz/src/quux.erl", which don't
exist.

int:find_src/2 does the same.

It seems to me that the correct behaviour would be to use the 'source'
property, if present...?
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