Chapel: Field and method symbols not getting exported in use-only case

[ben-albrecht]

Summary of Problem

Field and method symbols don't seem to get exported to the user code in the example below. I would expect the methods and fields to be accessible, despite doing a use bash only;.

Steps to Reproduce

Source Code:

proc main() {
  use bash only;

  var p = bash.ls();

  var output = p.stdout; // <---  unresolved call 'subprocess(dynamic,true).stdout'
}


module bash {
  use spawn;

  proc ls(args='') {
    var p = spawn.spawnshell('ls ' + args, stdout=spawn.pipe, stderr=spawn.pipe);
    p.wait();
    return p;
  }
}

Compile command:

> chpl userCode.chpl
userCode.chpl:3: In function 'main':
userCode.chpl:8: error: unresolved call 'subprocess(dynamic,true).stdout'
userCode.chpl:8: note: because no functions named stdout found in scope

Configuration Information

• Output of chpl --version: chpl version 1.21.0 pre-release (f3e74adea4)

[ben-albrecht]

@lydia-duncan - this is the issue we briefly chatted about yesterday.

Note that this isn't as general as the title implies (suggested title improvements are welcome @bradcray). This only occurs when the type is defined in a module used by a module that is use-only'd. So if I defined a custom type in bash, the fields and methods on that type would get exported correctly.

[bradcray]

I think this relates, at least thematically, to issue #14407?

[ben-albrecht]

It hasn't be asked in this issue, but I consider this a bug, from the "I want Chapel imports to work like Python" perspective.

Here's the working python equivalent for reference:

"""User code"""

import bash

p = bash.ls()

output = p.stdout.read().decode('utf-8')
print(output)

"""bash.py"""

from subprocess import *
import shlex


def ls(args=''):
    p = Popen(shlex.split('ls ' + args), stdout=PIPE,
                         stderr=PIPE)
    p.wait();
    return p

[lydia-duncan]

Resolved by #15003