Looks like upstream commit adf4c9bd2e274968e1abc2430376349eb3f3d392 broke qemu-5.2.0-disable-keymap.patch. patching file meson.build Hunk #1 succeeded at 667 with fuzz 1 (offset 330 lines). patching file pc-bios/keymaps/meson.build Hunk #1 FAILED at 33. 1 out of 1 hunk FAILED -- saving rejects to file pc-bios/keymaps/meson.build.rej
Thank you for identifying the breaking commit.
Meanwhile fixed.