[package] flatbuffers/1.12.0 Not building on ARM + clang-19

[HazyMrf]

Description

I encountered the same bug as described in google/flatbuffers#6036, it was fixed back then here -- google/flatbuffers@82fac32, but not for 1.12 version

Package and Environment Details

• Package Name/Version: flatbuffers/1.12.0
• Operating System+version: macOS Sonoma 14.3
• Compiler+version: clang-19
• Conan version: conan 1.65.0

Conan profile

[settings]
os=Macos
os_build=Macos
arch=armv8
arch_build=armv8
compiler=apple-clang
compiler.version=19
compiler.libcxx=libc++
build_type=Release
[options]
[conf]
[build_requires]
[env]

Steps to reproduce

just build flatbuffers from source using clang++-19 on MacOS -- this is what Conan package does.

The patch is pretty easy, I can even do this myself

Logs

error: overload resolution selected deleted operator '='
1875 | buf_ = other.buf_;
| ~~~~ ^ ~~~~~~~~~~
note: candidate function has been explicitly deleted
1002 | FLATBUFFERS_DELETE_FUNC(vector_downward &operator=(const vector_downward &))
| ^
note: candidate function not viable: expects an rvalue for 1st argument
834 | vector_downward &operator=(vector_downward &&other) {