1 files changed, 74 insertions, 0 deletions
diff --git a/test/diagnostics/duplicate-set-field.lua b/test/diagnostics/duplicate-set-field.lua
new file mode 100644
index 00000000..469bc3ea
--- /dev/null
+++ b/test/diagnostics/duplicate-set-field.lua
@@ -0,0 +1,74 @@
+TEST [[
+local m = {}
+
+function <!m:fff!>()
+end
+
+function <!m:fff!>()
+end
+
+return m
+]]
+
+TEST [[
+local m = {}
+
+function <!m:fff!>()
+end
+
+do
+    function <!m:fff!>()
+    end
+end
+
+return m
+]]
+
+TEST [[
+local m = {}
+
+m.x = true
+m.x = false
+
+return m
+]]
+
+TEST [[
+local m = {}
+
+m.x = io.open('')
+m.x = nil
+
+return m
+]]
+
+TEST [[
+---@class A
+X = {}
+
+function <!X.f!>() end
+
+function <!X.f!>() end
+]]
+
+TEST [[
+---@meta
+
+---@class A
+X = {}
+
+function X.f() end
+
+function X.f() end
+]]
+
+TEST [[
+---@class A
+X = {}
+
+if true then
+    function X.f() end
+else
+    function X.f() end
+end
+]]