Sergey,

This patch moves the aforementioned test from the <misc> to the <lang/>
directory (with slightly renaming to be consistent with other names),
includes it in <index>, and names the subtest.

Part of tarantool/tarantool#9398
---

 test/LuaJIT-tests/lang/index         |  1 +
 test/LuaJIT-tests/lang/stackov_c.lua | 12 ++++++++++++

 test/LuaJIT-tests/misc/stackovc.lua  |  4 ----
 3 files changed, 13 insertions(+), 4 deletions(-)
 create mode 100644 test/LuaJIT-tests/lang/stackov_c.lua
 delete mode 100644 test/LuaJIT-tests/misc/stackovc.lua

diff --git a/test/LuaJIT-tests/lang/index b/test/LuaJIT-tests/lang/index
index fa6db3c3..8da748d0 100644
--- a/test/LuaJIT-tests/lang/index
+++ b/test/LuaJIT-tests/lang/index
@@ -18,6 +18,7 @@ modulo.lua
 concat.lua
 self.lua
 stackov.lua
+stackov_c.lua
 table.lua
 parse_comp.lua
 parse_esc.lua
diff --git a/test/LuaJIT-tests/lang/stackov_c.lua b/test/LuaJIT-tests/lang/stackov_c.lua
new file mode 100644
index 00000000..cea1a09e
--- /dev/null
+++ b/test/LuaJIT-tests/lang/stackov_c.lua
@@ -0,0 +1,12 @@
+do --- Too many results to unpack.
+  local j = 1e4
+  local co = coroutine.create(function()
+    local t = {}
+    for i = 1, j do
+      t[i] = i
+    end
+    return unpack(t)
+  end)
+  local ok, err = coroutine.resume(co)
+  assert(not ok and string.find(err, "unpack"))
+end
diff --git a/test/LuaJIT-tests/misc/stackovc.lua b/test/LuaJIT-tests/misc/stackovc.lua
deleted file mode 100644
index c00bcbd8..00000000
--- a/test/LuaJIT-tests/misc/stackovc.lua
+++ /dev/null
@@ -1,4 +0,0 @@
-local j = 1e4
-local co = coroutine.create(function() t = {} for i = 1, j do t[i] = i end return unpack(t) end)
-local ok, err = coroutine.resume(co)
-assert(not ok and string.find(err, "unpack"))