Shell layer shell buffer doesn't obey location property

[MRFaria]

Description:
Shell layer shell buffer doesn't obey location property when the default shell is 'shell

Reproduction guide:

• Start Emacs
• run <SPC '>

Observed behaviour:
Starting the shell buffer by pressin <SPC '> brings it up at the top of the frame, or in an already created split window. Not the bottom as requested by setting 'shell-default-position to 'bottom

Expected behaviour:
Shell buffer should appear at the bottom. Note, this works if I set 'shell-default-shell to 'ansi-term; but I prefer using 'shell.

System Info:

• OS: gnu/linux
• Emacs: 25.1.1
• Spacemacs: 0.200.7
• Spacemacs branch: nil (rev. 57e653a)
• Graphic display: t
• Distribution: spacemacs
• Editing style: vim
• Completion: helm
• Layers:

(python ibuffer helm auto-completion better-defaults emacs-lisp c-c++ semantic d gnus
        (gtags :variables gtags-enable-by-default t)
        (shell :variables shell-default-shell 'shell shell-default-position 'bottom)
        (org))

• System configuration features: XPM JPEG TIFF GIF PNG RSVG IMAGEMAGICK SOUND DBUS GCONF NOTIFY ACL LIBSELINUX GNUTLS LIBXML2 FREETYPE XFT ZLIB TOOLKIT_SCROLL_BARS GTK2 X11

[MRFaria]

C-c C-c to submit the issue didn't work for me from emacs, so I just copied and pasted the text in the buffer

[bmag]

Sounds like either #7691 (upstream bug in shell-pop, reproducible in stock Emacs) or #8171 (some clash between window-purpose and shell-pop). @MRFaria can you verify that your problem either reproduces with stock Emacs, or disappears if you disable purpose-mode?

[MRFaria]

Disabling purpose-mode doesn't do anything, but it looks like the issue still happens in stock emacs.
I installed shell-pop through marmalade:
M-: (add-to-list 'package-archives '("marmalade" . "http://marmalade-repo.org/packages/"))
M-x package-refresh-contents
M-x package-install [RET] shell-pop

Then I customised shell-pop to appear on the bottom:
M-: (require 'shell-pop)
M-x customize-set-variable [RET] shell-pop-window-position [RET] bottom

Then, when running shell-pop it appears on the top of the frame anyway

[bmag]

@MRFaria thanks, I'm closing this as a duplicate of #7691. We're waiting for the issue to be resolved upstream. Judging from the activity in https://github.com/kyagi/shell-pop-el/commits/master, it seems it won't be fixed unless someone submits a patch.