Test PathFuncs.move_or_copy fails on GCC 13

[sin-ack]

Fails on both arm64 and amd64. Version 2024.11.04.00.

Log:

# ctest -j24 --test-load 24 --rerun-failed --output-on-failure
Test project /var/tmp/portage/dev-cpp/edencommon-2024.11.04.00/work/edencommon-2024.11.04.00_build
    Start 123: PathFuncs.move_or_copy
1/1 Test #123: PathFuncs.move_or_copy ...........***Failed    0.08 sec
Running main() from gmock_main.cc
Note: Google Test filter = PathFuncs.move_or_copy
[==========] Running 1 test from 1 test suite.
[----------] Global test environment set-up.
[----------] 1 test from PathFuncs
[ RUN      ] PathFuncs.move_or_copy
/var/tmp/portage/dev-cpp/edencommon-2024.11.04.00/work/edencommon-2024.11.04.00/eden/common/utils/test/PathFuncsTest.cpp:1378: Failure
Expected equality of these values:
  moved
    Which is: 2
  1

[  FAILED  ] PathFuncs.move_or_copy (2 ms)
[----------] 1 test from PathFuncs (2 ms total)

[----------] Global test environment tear-down
[==========] 1 test from 1 test suite ran. (5 ms total)
[  PASSED  ] 0 tests.
[  FAILED  ] 1 test, listed below:
[  FAILED  ] PathFuncs.move_or_copy

 1 FAILED TEST


0% tests passed, 1 tests failed out of 1

Total Test time (real) =   0.15 sec

The following tests FAILED:
	123 - PathFuncs.move_or_copy (Failed)
Errors while running CTest

[sin-ack]

Reduced it to https://godbolt.org/z/fYdTaarTM, seems to be compiler weirdness... Removing the redundant block inside b will cause moved to be equal to 1 on both GCC 13 and 14.

Code

#include <cstdint>
#include <utility>
template <typename a> a b(a c) {
  {
    auto copied = std::move(c);
    return copied;
  }
}

int main() {
  uint32_t moved;
  
  class g {
  public:
    g(uint32_t *d) : d{d} {}
    g(g &e) : d{e.d} {}
    g(g &&e) : d{e.d} { *d += 1; }
    uint32_t *d;
  };

  g f{&moved};
  b(f);

  return moved != 1;
}