[Bug]: Uninitialized value in AnyInvocable.

[vitaliy-aksyonov]

Describe the issue

Uninitialized value in AnyInvocable.

Steps to reproduce the problem

When move from one instance of AnyInvocable to another, GCC v 12+ with -O2 or more and -Wall complains about uninitialized value used.
Example: https://godbolt.org/z/c4KMhcYcc
If change to -O1 - warning disappear.

In file included from /opt/compiler-explorer/libs/abseil/absl/functional/any_invocable.h:43,
                 from <source>:1:
In function 'void absl::internal_any_invocable::LocalManagerTrivial(FunctionToCall, TypeErasedState*, TypeErasedState*)',
    inlined from 'absl::internal_any_invocable::CoreImpl<SigIsNoexcept, ReturnType, P>::CoreImpl(absl::internal_any_invocable::CoreImpl<SigIsNoexcept, ReturnType, P>&&) [with bool SigIsNoexcept = false; ReturnType = void; P = {}]' at /opt/compiler-explorer/libs/abseil/absl/functional/internal/any_invocable.h:481:11,
    inlined from 'absl::internal_any_invocable::Impl<void()>::Impl(absl::internal_any_invocable::Impl<void()>&&)' at /opt/compiler-explorer/libs/abseil/absl/functional/internal/any_invocable.h:868:1,
    inlined from 'absl::AnyInvocable<Sig>::AnyInvocable(absl::AnyInvocable<Sig>&&) [with Sig = void()]' at /opt/compiler-explorer/libs/abseil/absl/functional/any_invocable.h:184:3,
    inlined from 'int main()' at <source>:7:49:
/opt/compiler-explorer/libs/abseil/absl/functional/internal/any_invocable.h:266:7: warning: 'fn.absl::AnyInvocable<void()>::<unnamed>.absl::internal_any_invocable::Impl<void()>::<unnamed>.absl::internal_any_invocable::CoreImpl<false, void>::state_' is used uninitialized [-Wuninitialized]
  266 |   *to = *from;
      |   ~~~~^~~~~~~
<source>: In function 'int main()':
<source>:6:32: note: 'fn' declared here
    6 |     absl::AnyInvocable<void()> fn{[](){ std::cout << "test\n"; }};
      |                                ^~
ASM generation compiler returned: 0
In file included from /opt/compiler-explorer/libs/abseil/absl/functional/any_invocable.h:43,
                 from <source>:1:
In function 'void absl::internal_any_invocable::LocalManagerTrivial(FunctionToCall, TypeErasedState*, TypeErasedState*)',
    inlined from 'absl::internal_any_invocable::CoreImpl<SigIsNoexcept, ReturnType, P>::CoreImpl(absl::internal_any_invocable::CoreImpl<SigIsNoexcept, ReturnType, P>&&) [with bool SigIsNoexcept = false; ReturnType = void; P = {}]' at /opt/compiler-explorer/libs/abseil/absl/functional/internal/any_invocable.h:481:11,
    inlined from 'absl::internal_any_invocable::Impl<void()>::Impl(absl::internal_any_invocable::Impl<void()>&&)' at /opt/compiler-explorer/libs/abseil/absl/functional/internal/any_invocable.h:868:1,
    inlined from 'absl::AnyInvocable<Sig>::AnyInvocable(absl::AnyInvocable<Sig>&&) [with Sig = void()]' at /opt/compiler-explorer/libs/abseil/absl/functional/any_invocable.h:184:3,
    inlined from 'int main()' at <source>:7:49:
/opt/compiler-explorer/libs/abseil/absl/functional/internal/any_invocable.h:266:7: warning: 'fn.absl::AnyInvocable<void()>::<unnamed>.absl::internal_any_invocable::Impl<void()>::<unnamed>.absl::internal_any_invocable::CoreImpl<false, void>::state_' is used uninitialized [-Wuninitialized]
  266 |   *to = *from;
      |   ~~~~^~~~~~~
<source>: In function 'int main()':
<source>:6:32: note: 'fn' declared here
    6 |     absl::AnyInvocable<void()> fn{[](){ std::cout << "test\n"; }};
      |     

What version of Abseil are you using?

latest from git

What operating system and version are you using?

linux

What compiler and version are you using?

gcc v 12.1

What build system are you using?

none

Additional context

No response