fixes #12989 (#12992)

* fixes #12989
* Revert "remove unwanted changes"

This reverts commit 501829732a8e44deef2d815c303859efbe452cb5.

tests/destructor/t12037.nim

@@ -23,3 +23,12 @@ test()
 import tables
 var t = initTable[string, seq[ptr int]]()
 discard t.hasKeyOrPut("f1", @[])
+
+
+#############################################
+### bug #12989
+proc bug(start: (seq[int], int)) =
+  let (s, i) = start
+
+let input = @[0]
+bug((input, 0))

tests/destructor/tmisc_destructors.nim

@@ -28,7 +28,7 @@ proc test(): auto =
 var (a, b, _) = test()
 
 doAssert assign_counter == 0
-doAssert sink_counter == 9 # XXX this is still silly and needs to be investigated
+doAssert sink_counter == 6
 
 # bug #11510
 proc main =