From 1e079fa987ac5211a1749c13a4efaa6090963fa7 Mon Sep 17 00:00:00 2001
From: Rui Abreu Ferreira <raf-ep@gmx.com>
Date: Fri, 30 Sep 2016 15:29:50 +0100
Subject: system([...]): Set v:shell_error=-1 if not executable.

Do _not_ set v:shell_error on parameter validation error.

system([...]) does not invoke a shell, so this change is somewhat
questionable. But `:help v:shell_error` is sufficiently vague to allow
-1 in this case.
---
 src/nvim/eval.c | 6 +++++-
 1 file changed, 5 insertions(+), 1 deletion(-)

(limited to 'src')

diff --git a/src/nvim/eval.c b/src/nvim/eval.c
index 17e89e5757..1688a565c1 100644
--- a/src/nvim/eval.c
+++ b/src/nvim/eval.c
@@ -16994,8 +16994,12 @@ static void get_system_output_as_rettv(typval_T *argvars, typval_T *rettv,
   }
 
   // get shell command to execute
-  char **argv = tv_to_argv(&argvars[0], NULL, NULL);
+  bool executable = true;
+  char **argv = tv_to_argv(&argvars[0], NULL, &executable);
   if (!argv) {
+    if (!executable) {
+      set_vim_var_nr(VV_SHELL_ERROR, (long)-1);
+    }
     xfree(input);
     return;  // Already did emsg.
   }
-- 
cgit