QEMU immediately exits when combining a GL-enabled SDL display with SPICE

Host environment

• Operating system: Arch Linux
• OS/kernel version: 5.17.9
• Architecture: x86
• QEMU flavor: qemu-system-x86_64
• QEMU version: 7.0.0 (also reproducible on latest master, 3757b0d0).
• QEMU command line:

  ./qemu-system-x86_64 -display sdl,gl=on -spice port=5930

Emulated/Virtualized environment

None.

Description of problem

Running QEMU with the given command line results in QEMU immediately exiting with this line being printed, and no other output:

qemu-system-x86_64: Display spice is incompatible with the GL context

I am unsure whether this is a supported mode of setting up QEMU, but QEMU 6.2.0 ran just fine with it (or, to be more precise, it wasn't an issue until ac32b2ff).

The issue does not happen with -display sdl,gl=off, as GL is presumably not involved at all in that case.

Steps to reproduce

1. Run ./qemu-system-x86_64 -display sdl,gl=on -spice port=5930.

Additional information

This issue has been reproduced on other distributions, including Ubuntu 20.04 and Ubuntu 22.04.