Wrong destructors injected for phantom types

[darkestpigeon]

Description

Destructors of wrong type are injected for phantom types (with generic parameters that don't appear in the type's fields).

Here is a toy example:

type Phantom[T] = object
  value: int
  # markerField: T

proc initPhantom[T](value: int): Phantom[T] =
  doAssert value >= 0
  echo "created " & $Phantom[T] & " with value " & $value
  result = Phantom[T](value: value)

proc `=wasMoved`[T](x: var Phantom[T]) =
  x.value = -1

proc `=destroy`[T](x: Phantom[T]) =
  if x.value >= 0:
    echo "destroyed " & $Phantom[T] & " with value " & $x.value


let
  x = initPhantom[float](1)
  y = initPhantom[string](2)
  z = initPhantom[byte](3)

Nim Version

Nim Compiler Version 2.2.0 [Linux: amd64]
Compiled at 2024-10-02
Copyright (c) 2006-2024 by Andreas Rumpf

git hash: 78983f1876726a49c69d65629ab433ea1310ece1
active boot switches: -d:release

Nim Compiler Version 2.2.1 [Linux: amd64]
Compiled at 2024-10-27
Copyright (c) 2006-2024 by Andreas Rumpf

git hash: 24aa92c14f2301d1ef63f59bc4ae2ec31a64f9c5
active boot switches: -d:release

Current Output

created Phantom[system.float] with value 1
created Phantom[system.string] with value 2
created Phantom[system.byte] with value 3
destroyed Phantom[system.float] with value 3
destroyed Phantom[system.float] with value 2
destroyed Phantom[system.float] with value 1

Expected Output

created Phantom[system.float] with value 1
created Phantom[system.string] with value 2
created Phantom[system.byte] with value 3
destroyed Phantom[system.byte] with value 3
destroyed Phantom[system.string] with value 2
destroyed Phantom[system.float] with value 1

Known Workarounds

The problem disappears if the field markerField: T is uncommented.

Additional Information

No response

[metagn]

Related/same #22479