Protect from an infinite loop

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[vermiculus]

Please use only spaces – no tabs. You might also consider chort-circuiting this and.

Can you explain what problem you're fixing and how this patch resolves the issue?

[hexmode]

Without this check before the recursion, I was getting an infinite loop.

[hexmode]

Section from backtrace:

  magithub-repo(((owner (login . "source")) (name . "mw-rel")))
  (let ((magithub-cache--refresh t)) (magithub-repo sparse-repo))
  (progn (let ((magithub-cache--refresh t)) (magithub-repo sparse-repo)))
  (if (magithub-online-p) (progn (let ((magithub-cache--refresh t)) (magithub-repo sparse-repo))))
  (or (magithub-cache :repo-demographics (cons 'or (cons (list 'magithub-request (list 'ghubp-get-repos-owner-repo (list 'quote sparse-repo))) '((and (not ...) sparse-repo))))) (if (magithub-online-p) (progn (let ((magithub-cache--refresh t)) (magithub-repo sparse-repo)))) sparse-repo)
  (if sparse-repo (or (magithub-cache :repo-demographics (cons 'or (cons (list 'magithub-request (list 'ghubp-get-repos-owner-repo (list ... sparse-repo))) '((and ... sparse-repo))))) (if (magithub-online-p) (progn (let ((magithub-cache--refresh t)) (magithub-repo sparse-repo)))) sparse-repo) nil)
  (let* ((sparse-repo (and t (or sparse-repo (magithub-source--sparse-repo))))) (if sparse-repo (or (magithub-cache :repo-demographics (cons 'or (cons (list 'magithub-request (list ... ...)) '(...)))) (if (magithub-online-p) (progn (let ((magithub-cache--refresh t)) (magithub-repo sparse-repo)))) sparse-repo) nil))
  (if (and (stringp sparse-repo) (string-match "\\`\\(\\(?:[[:alnum:]]\\|-\\|\\.\\|_\\)+?\\)/\\(\\(?:[[:alnum..." sparse-repo)) (magithub-repo (list (list 'owner (cons 'login (match-string 1 sparse-repo))) (cons 'name (match-string 2 sparse-repo)))) (let* ((sparse-repo (and t (or sparse-repo (magithub-source--sparse-repo))))) (if sparse-repo (or (magithub-cache :repo-demographics (cons 'or (cons (list ... ...) '...))) (if (magithub-online-p) (progn (let (...) (magithub-repo sparse-repo)))) sparse-repo) nil)))
  magithub-repo(((owner (login . "source")) (name . "mw-rel")))
  (let ((magithub-cache--refresh t)) (magithub-repo sparse-repo))
  (progn (let ((magithub-cache--refresh t)) (magithub-repo sparse-repo)))
  (if (magithub-online-p) (progn (let ((magithub-cache--refresh t)) (magithub-repo sparse-repo))))
  (or (magithub-cache :repo-demographics (cons 'or (cons (list 'magithub-request (list 'ghubp-get-repos-owner-repo (list 'quote sparse-repo))) '((and (not ...) sparse-repo))))) (if (magithub-online-p) (progn (let ((magithub-cache--refresh t)) (magithub-repo sparse-repo)))) sparse-repo)
  (if sparse-repo (or (magithub-cache :repo-demographics (cons 'or (cons (list 'magithub-request (list 'ghubp-get-repos-owner-repo (list ... sparse-repo))) '((and ... sparse-repo))))) (if (magithub-online-p) (progn (let ((magithub-cache--refresh t)) (magithub-repo sparse-repo)))) sparse-repo) nil)
  (let* ((sparse-repo (and t (or sparse-repo (magithub-source--sparse-repo))))) (if sparse-repo (or (magithub-cache :repo-demographics (cons 'or (cons (list 'magithub-request (list ... ...)) '(...)))) (if (magithub-online-p) (progn (let ((magithub-cache--refresh t)) (magithub-repo sparse-repo)))) sparse-repo) nil))
  (if (and (stringp sparse-repo) (string-match "\\`\\(\\(?:[[:alnum:]]\\|-\\|\\.\\|_\\)+?\\)/\\(\\(?:[[:alnum..." sparse-repo)) (magithub-repo (list (list 'owner (cons 'login (match-string 1 sparse-repo))) (cons 'name (match-string 2 sparse-repo)))) (let* ((sparse-repo (and t (or sparse-repo (magithub-source--sparse-repo))))) (if sparse-repo (or (magithub-cache :repo-demographics (cons 'or (cons (list ... ...) '...))) (if (magithub-online-p) (progn (let (...) (magithub-repo sparse-repo)))) sparse-repo) nil)))
  magithub-repo(((owner (login . "source")) (name . "mw-rel")))
  (if repo (magithub-repo repo) nil)
  (let* ((repo (and t (magithub-repo-from-remote--sparse remote)))) (if repo (magithub-repo repo) nil))
  magithub-repo-from-remote(#("work" 0 4 (face magit-branch-remote)))
  (let ((repo (magithub-repo-from-remote (magit-get-push-remote branch)))) (if (alist-get 'fork repo) (progn (let* ((guess-head (format "%s:%s" (magit-get-push-remote branch) branch)) (prs (magithub-cache :ci-status (list ... ...)))) (let* ((val (length prs))) (cond ((eql val 0) nil) ((eql val 1) (magit-set ... "branch" branch "magithub" "sourcePR") (car prs)) (t (signal ... ...))))))))
  magithub-pull-request-branch->pr--ghub("master")
  (condition-case err (magithub-pull-request-branch->pr--ghub branch) ((debug error) (message "Error: %S" err) nil))
  (and (magithub-online-p) (condition-case err (magithub-pull-request-branch->pr--ghub branch) ((debug error) (message "Error: %S" err) nil)))
  (or (magithub-pull-request-branch->pr--gitconfig branch) (and (magithub-online-p) (condition-case err (magithub-pull-request-branch->pr--ghub branch) ((debug error) (message "Error: %S" err) nil))))
  (if (or (magithub-pull-request-branch->pr--gitconfig branch) (and (magithub-online-p) (condition-case err (magithub-pull-request-branch->pr--ghub branch) ((debug error) (message "Error: %S" err) nil)))) (magit-rev-parse branch) (let* ((push-branch (and t (magit-get-push-branch branch)))) (if push-branch (if (magit-branch-p push-branch) (progn (cdr (magit-split-branch-name push-branch)))) nil)))
  magithub-ci-status--get-default-ref()
  (let* ((ref (magithub-ci-status--get-default-ref)) (checks (magithub-ci-status ref)) (indent (make-string 10 32))) (if checks (progn (let* ((type38 'magithub-ci-status) (section39 (funcall (if ... type38 ...) :type (if ... ... type38) :value (cons ... ref) :start (point-marker) :parent magit-insert-section--parent))) (eieio-oset section39 'hidden (let* ((value ...)) (if value (eq value ...) (let* ... ...)))) (let ((magit-insert-section--current section39) (magit-insert-section--parent section39) (magit-insert-section--oldroot (or magit-insert-section--oldroot ...))) (catch 'cancel-section (magit-insert-heading (format "%-10s%s %s %s%s" "Status:" ... ... ... ...)) (let (... ...) (if ... ... ...)) (run-hooks 'magit-insert-section-hook) (magit-insert-child-count section39) (set-marker-insertion-type (eieio-oref section39 ...) t) (let* (... ... ... ... ...) (save-excursion ... ...)) (if (eq section39 magit-root-section) (let ... ...) (eieio-oset ... ... ...))) section39)))))
  magithub-insert-ci-status-header()
  (progn (magithub-insert-ci-status-header))
  (if (and (magithub-settings-include-status-p) (magithub-usable-p) (let ((b (magit-get-current-branch))) (or (magit-get-upstream-remote b) (magit-get-push-remote b)))) (progn (magithub-insert-ci-status-header)))
  magithub-maybe-insert-ci-status-header()
  apply(magithub-maybe-insert-ci-status-header nil)
  magit-run-section-hook(magit-status-headers-hook)
  magit-insert-headers(magit-status-headers-hook)
  magit-insert-status-headers()
  apply(magit-insert-status-headers nil)
  magit-run-section-hook(magit-status-sections-hook)
  magit-status-refresh-buffer()
  apply(magit-status-refresh-buffer nil)
  magit-refresh-buffer()
  magit-setup-buffer-internal(magit-status-mode nil ((magit-buffer-diff-args ("--no-ext-diff")) (magit-buffer-diff-files nil) (magit-buffer-log-args ("-n256" "--decorate")) (magit-buffer-log-files nil)))
  magit-status-setup-buffer(".../src/")
  vc-dir(nil ((434 . 16) (("..." "describe" "--contains" "HEAD")) (("..." "describe" "--long" "--tags")) (("..." "show" "--no-patch" "--format=%s" #("work/master^{commit}" 0 11 (face magit-branch-remote)) "--") . "just before submodules work") (("..." "rev-parse" "--verify" #("work/master" 0 11 (face magit-branch-remote))) . "c0a9dae9f4b248391f841126c051f6967daec237") (("..." "show" "--no-patch" "--format=%s" #("origin/master^{commit}" 0 13 (face magit-branch-remote)) "--") . "just before submodules work") (("..." "rev-parse" "--verify" "--abbrev-ref" "master@{upstream}") . "origin/master") (("..." "show" "--no-patch" "--format=%h %s" "HEAD^{commit}" "--") . "5b72fcb238 snapshot") (("..." "symbolic-ref" "--short" "HEAD") . "master") (("..." "rev-parse" "--verify" "HEAD") . "5b72fcb238aacf6ac1e83e330325bd34257b6dd5") (("..." . config) . #<hash-table equal 41/65 0x1563f21c2709>) (("..." . magit-toplevel) . "...") ((".../src/" . magit-toplevel) . "...") (("..." "rev-parse" "--show-toplevel") . "...") (("..." "rev-parse" "--show-cdup") . "") ((".../src/" "rev-parse" "--show-cdup") . "../") ((".../src/" "rev-parse" "--show-toplevel") . "...")))
  funcall-interactively(vc-dir nil ((434 . 16) (("..." "describe" "--contains" "HEAD")) (("..." "describe" "--long" "--tags")) (("..." "show" "--no-patch" "--format=%s" #("work/master^{commit}" 0 11 (face magit-branch-remote)) "--") . "just before submodules work") (("..." "rev-parse" "--verify" #("work/master" 0 11 (face magit-branch-remote))) . "c0a9dae9f4b248391f841126c051f6967daec237") (("..." "show" "--no-patch" "--format=%s" #("origin/master^{commit}" 0 13 (face magit-branch-remote)) "--") . "just before submodules work") (("..." "rev-parse" "--verify" "--abbrev-ref" "master@{upstream}") . "origin/master") (("..." "show" "--no-patch" "--format=%h %s" "HEAD^{commit}" "--") . "5b72fcb238 snapshot") (("..." "symbolic-ref" "--short" "HEAD") . "master") (("..." "rev-parse" "--verify" "HEAD") . "5b72fcb238aacf6ac1e83e330325bd34257b6dd5") (("..." . config) . #<hash-table equal 41/65 0x1563f21c2709>) (("..." . magit-toplevel) . "...") ((".../src/" . magit-toplevel) . "...") (("..." "rev-parse" "--show-toplevel") . "...") (("..." "rev-parse" "--show-cdup") . "") ((".../src/" "rev-parse" "--show-cdup") . "../") ((".../src/" "rev-parse" "--show-toplevel") . "...")))
  call-interactively(vc-dir nil nil)
  command-execute(vc-dir)