Regression in deepcopy(Base.GenericCondition(ReentrantLock())) from 1.7.3 to 1.8.0 (also present on master)

[DilumAluthge]

deepcopy(Base.GenericCondition(ReentrantLock())) works on 1.7.3 but errors on 1.8.0 and master.

On 1.7.3:

               _
   _       _ _(_)_     |  Documentation: https://docs.julialang.org
  (_)     | (_) (_)    |
   _ _   _| |_  __ _   |  Type "?" for help, "]?" for Pkg help.
  | | | | | | |/ _` |  |
  | | |_| | | | (_| |  |  Version 1.7.3 (2022-05-06)
 _/ |\__'_|_|_|\__'_|  |  Official https://julialang.org/ release
|__/                   |

julia> a = Base.GenericCondition(ReentrantLock())
Base.GenericCondition{ReentrantLock}(Base.InvasiveLinkedList{Task}(nothing, nothing), ReentrantLock(nothing, Base.GenericCondition{Base.Threads.SpinLock}(Base.InvasiveLinkedList{Task}(nothing, nothing), Base.Threads.SpinLock(0)), 0))

julia> b = deepcopy(a)
Base.GenericCondition{ReentrantLock}(Base.InvasiveLinkedList{Task}(nothing, nothing), ReentrantLock(nothing, Base.GenericCondition{Base.Threads.SpinLock}(Base.InvasiveLinkedList{Task}(nothing, nothing), Base.Threads.SpinLock(0)), 0))

On 1.8.0:

               _
   _       _ _(_)_     |  Documentation: https://docs.julialang.org
  (_)     | (_) (_)    |
   _ _   _| |_  __ _   |  Type "?" for help, "]?" for Pkg help.
  | | | | | | |/ _` |  |
  | | |_| | | | (_| |  |  Version 1.8.0 (2022-08-17)
 _/ |\__'_|_|_|\__'_|  |  Official https://julialang.org/ release
|__/                   |

julia> a = Base.GenericCondition(ReentrantLock())
Base.GenericCondition{ReentrantLock}(Base.InvasiveLinkedList{Task}(nothing, nothing), ReentrantLock(nothing, 0x00000000, 0x00, Base.GenericCondition{Base.Threads.SpinLock}(Base.InvasiveLinkedList{Task}(nothing, nothing), Base.Threads.SpinLock(0)), (0, 0, 0)))

julia> b = deepcopy(a)
ERROR: MethodError: no method matching deepcopy_internal(::ReentrantLock)
Closest candidates are:
  deepcopy_internal(::Base.AbstractLock, ::IdDict) at deepcopy.jl:130
  deepcopy_internal(::Any, ::IdDict) at deepcopy.jl:53
  deepcopy_internal(::BigInt, ::IdDict) at gmp.jl:794
  ...
Stacktrace:
 [1] deepcopy_internal
   @ ./deepcopy.jl:143 [inlined]
 [2] deepcopy(x::Base.GenericCondition{ReentrantLock})
   @ Base ./deepcopy.jl:26
 [3] top-level scope
   @ REPL[2]:1

On nightly (1.9.0-DEV.1151):

               _
   _       _ _(_)_     |  Documentation: https://docs.julialang.org
  (_)     | (_) (_)    |
   _ _   _| |_  __ _   |  Type "?" for help, "]?" for Pkg help.
  | | | | | | |/ _` |  |
  | | |_| | | | (_| |  |  Version 1.9.0-DEV.1151 (2022-08-18)
 _/ |\__'_|_|_|\__'_|  |  Commit 6b8e9f97ec9 (0 days old master)
|__/                   |

julia> a = Base.GenericCondition(ReentrantLock())
Base.GenericCondition{ReentrantLock}(Base.IntrusiveLinkedList{Task}(nothing, nothing), ReentrantLock(nothing, 0x00000000, 0x00, Base.GenericCondition{Base.Threads.SpinLock}(Base.IntrusiveLinkedList{Task}(nothing, nothing), Base.Threads.SpinLock(0)), (0, 0, 0)))

julia> b = deepcopy(a)
ERROR: MethodError: no method matching deepcopy_internal(::ReentrantLock)

Closest candidates are:
  deepcopy_internal(::Base.AbstractLock, ::IdDict)
   @ Base deepcopy.jl:130
  deepcopy_internal(::Any, ::IdDict)
   @ Base deepcopy.jl:53
  deepcopy_internal(::BigInt, ::IdDict)
   @ Base gmp.jl:795
  ...

Stacktrace:
 [1] deepcopy_internal
   @ ./deepcopy.jl:143 [inlined]
 [2] deepcopy(x::Base.GenericCondition{ReentrantLock})
   @ Base ./deepcopy.jl:26
 [3] top-level scope
   @ REPL[2]:1

Motivation

The motivation is that I have a struct of the form:

struct Foo
    bar::Channel{Bool}
end

Foo() = Foo(Channel{Bool}(0))

And then I want to be able to do the following

julia> a = Foo()

julia> b = deepcopy(a)

This code works on 1.7.3 but errors on 1.8.0 and nightly; here's the stacktrace on nightly:

               _
   _       _ _(_)_     |  Documentation: https://docs.julialang.org
  (_)     | (_) (_)    |
   _ _   _| |_  __ _   |  Type "?" for help, "]?" for Pkg help.
  | | | | | | |/ _` |  |
  | | |_| | | | (_| |  |  Version 1.9.0-DEV.1151 (2022-08-18)
 _/ |\__'_|_|_|\__'_|  |  Commit 6b8e9f97ec9 (0 days old master)
|__/                   |

julia> struct Foo
           bar::Channel{Bool}
       end

julia> Foo() = Foo(Channel{Bool}(0))
Foo

julia> a = Foo()
Foo(Channel{Bool}(0))

julia> b = deepcopy(a)
ERROR: MethodError: no method matching deepcopy_internal(::ReentrantLock)

Closest candidates are:
  deepcopy_internal(::Base.AbstractLock, ::IdDict)
   @ Base deepcopy.jl:130
  deepcopy_internal(::Any, ::IdDict)
   @ Base deepcopy.jl:53
  deepcopy_internal(::BigInt, ::IdDict)
   @ Base gmp.jl:795
  ...

Stacktrace:
 [1] deepcopy_internal(x::Base.GenericCondition{ReentrantLock}, stackdict::IdDict{Any, Any})
   @ Base ./deepcopy.jl:143
 [2] deepcopy_internal(x::Any, stackdict::IdDict{Any, Any})
   @ Base ./deepcopy.jl:65
 [3] deepcopy_internal
   @ ./deepcopy.jl:76 [inlined]
 [4] deepcopy(x::Foo)
   @ Base ./deepcopy.jl:26
 [5] top-level scope
   @ REPL[4]:1