[tarantool-patches] [PATCH] lua: fix assertion failure after improper box.schema.user:passwd() call

[Serge Petrenko <sergepetrenko@tarantool.org>]

Calling box.schema.user:passwd() instead of box.schema.user.passwd()
leads to lua passing box.schema.user table as first function argument.
This case was unhandled in box.schema.user.passwd() function and lead to
an assertion failure.
Fix this by handling the aforementioned case and add a test.

Closes #3659
---
https://github.com/tarantool/tarantool/issues/3659
https://github.com/tarantool/tarantool/tree/sp/gh-3659-assert-in-user-passwd

 src/box/lua/schema.lua | 2 +-
 test/box/misc.result   | 8 ++++++++
 test/box/misc.test.lua | 6 ++++++
 3 files changed, 15 insertions(+), 1 deletion(-)

diff --git a/src/box/lua/schema.lua b/src/box/lua/schema.lua
index 540a2a5fd..6b0c1cbb7 100644
--- a/src/box/lua/schema.lua
+++ b/src/box/lua/schema.lua
@@ -2025,7 +2025,7 @@ local function chpasswd(uid, new_password)
 end
 
 box.schema.user.passwd = function(name, new_password)
-    if name == nil then
+    if name == nil or type(name) == 'table' then
         box.error(box.error.PROC_LUA, "Usage: box.schema.user.passwd([user,] password)")
     end
     if new_password == nil then
diff --git a/test/box/misc.result b/test/box/misc.result
index 62376754e..6f05df0fa 100644
--- a/test/box/misc.result
+++ b/test/box/misc.result
@@ -1148,6 +1148,14 @@ s = box.schema.space.create('test', {user="no_such_user"})
 ---
 - error: User 'no_such_user' is not found
 ...
+--
+-- gh-3659 assertion failure on improper call to
+-- box.schema.user:passwd()
+--
+box.schema.user:passwd()
+---
+- error: 'Usage: box.schema.user.passwd([user,] password)'
+...
 -- Too long WAL write warning (gh-2743).
 s = box.schema.space.create('test')
 ---
diff --git a/test/box/misc.test.lua b/test/box/misc.test.lua
index d6815645e..79c74ecbb 100644
--- a/test/box/misc.test.lua
+++ b/test/box/misc.test.lua
@@ -320,6 +320,12 @@ s:drop()
 --
 s = box.schema.space.create('test', {user="no_such_user"})
 
+--
+-- gh-3659 assertion failure on improper call to
+-- box.schema.user:passwd()
+--
+box.schema.user:passwd()
+
 -- Too long WAL write warning (gh-2743).
 s = box.schema.space.create('test')
 _ = s:create_index('pk')
-- 
2.15.2 (Apple Git-101.1)