master 56d5a40794: Add a `restart-emacs' sanity check

[Lars Ingebrigtsen]

branch: master
commit 56d5a4079423aa22d2203a342439df7359eb1c18
Author: Lars Ingebrigtsen <larsi@gnus.org>
Commit: Lars Ingebrigtsen <larsi@gnus.org>

    Add a `restart-emacs' sanity check
    
    * src/emacs.c (Fkill_emacs): Add a sanity check for argv.
---
 src/emacs.c | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/src/emacs.c b/src/emacs.c
index 173e8e8923..a16e702ab7 100644
--- a/src/emacs.c
+++ b/src/emacs.c
@@ -2807,6 +2807,10 @@ killed.  */
 
   if (!NILP (restart))
     {
+      /* This is very unlikely, but it's possible to execute a binary
+        (on some systems) with no argv.  */
+      if (initial_argc < 1)
+       error ("No command line arguments known; unable to re-execute Emacs");
       if (execvp (*initial_argv, initial_argv) < 1)
        error ("Unable to re-execute Emacs");
     }