[elpa] externals/vc-hgcmd 876f7cb 20/87: Handle nil on reading parents

[Stefan Monnier]

branch: externals/vc-hgcmd
commit 876f7cbb1a8d37dd693e2a880f961dec08b2c2d2
Author: muffinmad <andreyk.mad@gmail.com>
Commit: muffinmad <andreyk.mad@gmail.com>

    Handle nil on reading parents
---
 vc-hgcmd.el | 5 +++--
 1 file changed, 3 insertions(+), 2 deletions(-)

diff --git a/vc-hgcmd.el b/vc-hgcmd.el
index fa365db..62424e1 100644
--- a/vc-hgcmd.el
+++ b/vc-hgcmd.el
@@ -470,8 +470,9 @@ Insert 'Running command' and display buffer text if COMMAND"
 
 (defun vc-hgcmd-dir-extra-headers (_dir)
   "Return summary command for DIR output as dir extra headers."
-  (let* ((parents (split-string (vc-hgcmd-command "log" "-r" "p1()+p2()" 
"--template" "{rev}:{node|short}\\0{branch}\\0{tags}\\0{desc|firstline}\n") 
"\n"))
-         (result (apply #'concat (mapcar #'vc-hgcmd--parent-info parents))))
+  (let* ((parents (vc-hgcmd-command "log" "-r" "p1()+p2()" "--template" 
"{rev}:{node|short}\\0{branch}\\0{tags}\\0{desc|firstline}\n"))
+         (result (when parents
+                   (apply #'concat (mapcar #'vc-hgcmd--parent-info 
(split-string parents "\n"))))))
     (with-temp-buffer
       (vc-hgcmd-command-output-buffer (current-buffer) "summary")
       (concat result