added test case for #9594

tests/destructor/tuse_result_prevents_sinks.nim

@@ -0,0 +1,31 @@
+discard """
+  output: ""
+"""
+
+# bug #9594
+
+type
+  Foo = object
+    i: int
+
+proc `=`(self: var Foo; other: Foo) =
+  self.i = other.i + 1
+
+proc `=sink`(self: var Foo; other: Foo) =
+  self.i = other.i
+
+proc `=destroy`(self: var Foo) = discard
+
+proc test(): Foo =
+  result = Foo()
+  let temp = result
+  doAssert temp.i > 0
+  return result
+
+proc testB(): Foo =
+  result = Foo()
+  let temp = result
+  doAssert temp.i > 0
+
+discard test()
+discard testB()