fixes #10942. Lent T bug (#10946)

* fixes #10942

* add test

* bug build

tests/types/tlent_var.nim

@@ -0,0 +1,25 @@
+discard """
+  output: ''''''
+"""
+
+type
+  MyObj = object
+    a: int
+
+proc test_lent(x: MyObj): lent int =
+  x.a
+
+proc test_var(x: var MyObj): var int =
+  x.a
+
+var x = MyObj(a: 5)
+
+doAssert: test_var(x).addr == x.a.addr
+doAssert: test_lent(x).unsafeAddr == x.a.addr
+
+proc varProc(x: var int) =
+  x = 100
+
+doAssert: not compiles(test_lent(x) = 1)
+doAssert: not compiles(varProc(test_lent(x)))
+