1 files changed, 48 insertions, 0 deletions
diff --git a/test/diagnostics/not-yieldable.lua b/test/diagnostics/not-yieldable.lua
new file mode 100644
index 00000000..81e972ee
--- /dev/null
+++ b/test/diagnostics/not-yieldable.lua
@@ -0,0 +1,48 @@
+TEST [[
+---@param cb fun()
+local function f(cb)
+    return cb
+end
+
+---@async
+local function af()
+    return nil
+end
+
+f(<!af!>)
+]]
+
+TEST [[
+---@param cb async fun()
+local function f(cb)
+    return cb
+end
+
+---@async
+local function af()
+    return nil
+end
+
+f(af)
+]]
+
+TEST [[
+local function f(cb)
+    cb()
+end
+
+---@async
+local function af()
+    f(function () ---@async
+        return nil
+    end)
+end
+
+return af
+]]
+
+TEST [[
+local _ = type(function () ---@async
+    return nil
+end)
+]]