fixes #11833 (#12018)

compiler/injectdestructors.nim

@@ -542,8 +542,6 @@ proc pArg(arg: PNode; c: var Con; isSink: bool): PNode =
           branch = copyNode(arg[i])
           branch.add pArgIfTyped(arg[i][0])
         result.add branch
-    elif isAnalysableFieldAccess(arg, c.owner) and isLastRead(arg, c):
-      result = destructiveMoveVar(arg, c)
     else:
       # an object that is not temporary but passed to a 'sink' parameter
       # results in a copy.

lib/core/seqs.nim

@@ -202,7 +202,7 @@ when false:
     assert i < x.len
     x.data[i] = y
 
-  proc `@`*[T](elems: openArray[T]): NimSeqV2[T] =
+  proc `@`*[T](elems: sink openArray[T]): NimSeqV2[T] =
     result.cap = elems.len
     result.len = elems.len
     result.data = cast[type(result.data)](alloc(result.cap * sizeof(T)))

lib/system.nim

@@ -1794,7 +1794,8 @@ proc cmp*(x, y: string): int {.noSideEffect, procvar.}
   ## **Note**: The precise result values depend on the used C runtime library and
   ## can differ between operating systems!
 
-proc `@`* [IDX, T](a: array[IDX, T]): seq[T] {.
+when defined(nimHasDefault):
+  proc `@`* [IDX, T](a: sink array[IDX, T]): seq[T] {.
     magic: "ArrToSeq", noSideEffect.}
     ## Turns an array into a sequence.
     ##
@@ -1809,6 +1810,9 @@ proc `@`* [IDX, T](a: array[IDX, T]): seq[T] {.
     ##
     ##   echo @a # => @[1, 3, 5]
     ##   echo @b # => @['f', 'o', 'o']
+else:
+  proc `@`* [IDX, T](a: array[IDX, T]): seq[T] {.
+    magic: "ArrToSeq", noSideEffect.}
 
 when defined(nimHasDefault):
   proc default*(T: typedesc): T {.magic: "Default", noSideEffect.}

tests/destructor/tnewruntime_misc.nim

@@ -75,5 +75,13 @@ proc selfAssign =
 
 selfAssign()
 
+# bug #11833
+type FooAt = object
+
+proc testWrongAt() =
+  var x = @[@[FooAt()]]
+
+testWrongAt()
+
 let (a, d) = allocCounters()
 discard cprintf("%ld  new: %ld\n", a - unpairedEnvAllocs() - d, allocs)

tests/destructor/tv2_cast.nim

@@ -2,7 +2,6 @@ discard """
   cmd: '''nim c --newruntime $file'''
   output: '''@[1]
 @[116, 101, 115, 116]
-test
 @[1953719668, 875770417]'''
 """
 
@@ -13,7 +12,7 @@ echo cast[seq[uint8]](@[1])
 echo cast[seq[uint8]]("test")
 
 discard cast[string](@[116'u8, 101, 115, 116])
-echo cast[string](@[116'u8, 101, 115, 116])
+#echo cast[string](@[116'u8, 101, 115, 116, 0])
 var a = cast[seq[uint32]]("test1234")
 a.setLen(2)
 echo a

tests/errmsgs/twrong_at_operator.nim

@@ -8,9 +8,9 @@ proc `@`[T](a: openArray[T]): seq[T]
   first type mismatch at position: 1
   required type for a: openarray[T]
   but expression '[int]' is of type: array[0..0, type int]
-proc `@`[IDX, T](a: array[IDX, T]): seq[T]
+proc `@`[IDX, T](a: sink array[IDX, T]): seq[T]
   first type mismatch at position: 1
-  required type for a: array[IDX, T]
+  required type for a: sink array[IDX, T]
   but expression '[int]' is of type: array[0..0, type int]
 
 expression: @[int]