Hi, Sergey!

Thanks for the patch! Please see my comments.

This patch refactors the <lang/coroutine.lua> test by adding a simple
check for the content of a `debug.traceback()` result. Also, the test is
moved to the <lib/coroutine/> directory.

The category for the test is debatable.

In fact, the test target is a function from `debug` module,

not coroutines.

Also, it removes the <misc/coro_traceback.lua> since it is the same test
that wasn't cleaned up during the refactoring in the original
repository.

Part of tarantool/tarantool#9398
---
 test/LuaJIT-tests/lang/coroutine.lua          |  8 --------
 test/LuaJIT-tests/lang/index                  |  1 -
 test/LuaJIT-tests/lib/coroutine/index         |  1 +
 test/LuaJIT-tests/lib/coroutine/traceback.lua | 14 ++++++++++++++
 test/LuaJIT-tests/misc/coro_traceback.lua     |  8 --------
 5 files changed, 15 insertions(+), 17 deletions(-)
 delete mode 100644 test/LuaJIT-tests/lang/coroutine.lua
 create mode 100644 test/LuaJIT-tests/lib/coroutine/traceback.lua
 delete mode 100644 test/LuaJIT-tests/misc/coro_traceback.lua

diff --git a/test/LuaJIT-tests/lang/coroutine.lua b/test/LuaJIT-tests/lang/coroutine.lua
deleted file mode 100644
index 405135c9..00000000
--- a/test/LuaJIT-tests/lang/coroutine.lua
+++ /dev/null
@@ -1,8 +0,0 @@
-do --- traceback
-  local co = coroutine.create(function()
-    local x = nil
-    local y = x.x
-  end)
-  assert(coroutine.resume(co) == false)
-  debug.traceback(co)
-end
diff --git a/test/LuaJIT-tests/lang/index b/test/LuaJIT-tests/lang/index
index 4ff7a297..803f32d8 100644
--- a/test/LuaJIT-tests/lang/index
+++ b/test/LuaJIT-tests/lang/index
@@ -14,7 +14,6 @@ concat.lua
 self.lua
 table.lua
 upvalue
-coroutine.lua
 tail_recursion.lua
 vararg_jit.lua
 gc.lua
diff --git a/test/LuaJIT-tests/lib/coroutine/index b/test/LuaJIT-tests/lib/coroutine/index
index 9c5c17ec..c4dc6cf1 100644
--- a/test/LuaJIT-tests/lib/coroutine/index
+++ b/test/LuaJIT-tests/lib/coroutine/index
@@ -1 +1,2 @@
+traceback.lua
 yield.lua
diff --git a/test/LuaJIT-tests/lib/coroutine/traceback.lua b/test/LuaJIT-tests/lib/coroutine/traceback.lua
new file mode 100644
index 00000000..2b900ef1
--- /dev/null
+++ b/test/LuaJIT-tests/lib/coroutine/traceback.lua
@@ -0,0 +1,14 @@
+do --- traceback
+  local function badfunc()
+    local x = nil
+    local y = x.x
+  end
+
+  local co = coroutine.create(badfunc)
+  assert(coroutine.resume(co) == false)
+
+  local traceback = debug.traceback(co)
+  local line = debug.getinfo(badfunc).linedefined
+
+  assert(traceback:match('traceback:.*:' .. line))
+end
diff --git a/test/LuaJIT-tests/misc/coro_traceback.lua b/test/LuaJIT-tests/misc/coro_traceback.lua
deleted file mode 100644
index 2676d2c6..00000000
--- a/test/LuaJIT-tests/misc/coro_traceback.lua
+++ /dev/null
@@ -1,8 +0,0 @@
-
-local co = coroutine.create(function()
-  local x = nil
-  local y = x.x
-end)
-assert(coroutine.resume(co) == false)
-debug.traceback(co)
-