QEMU 5.2.0 doesn't build reproducibly [regression]

> QEMU 5.1.0 builds reproducibly, but 5.2.0 doesn't.

>

> Here's a summary of the differing files:

>

> Here's a summary of the differing files:

>

> $ diff -r /gnu/store/l286mbanw78qgbn54gs5j23qm0v9abhw-qemu-5.2.0{,-check}

> Binary files /gnu/store/l286mbanw78qgbn54gs5j23qm0v9abhw-qemu-5.2.0/bin/qemu-aarch64 and /gnu/store/l286mbanw78qgbn54gs5j23qm0v9abhw-qemu-5.2.0-check/bin/qemu-aarch64 differ

> Binary files /gnu/store/l286mbanw78qgbn54gs5j23qm0v9abhw-qemu-5.2.0/bin/qemu-aarch64_be and /gnu/store/l286mbanw78qgbn54gs5j23qm0v9abhw-qemu-5.2.0-check/bin/qemu-aarch64_be differ

> Binary files /gnu/store/l286mbanw78qgbn54gs5j23qm0v9abhw-qemu-5.2.0/bin/qemu-alpha and /gnu/store/l286mbanw78qgbn54gs5j23qm0v9abhw-qemu-5.2.0-check/bin/qemu-alpha differ

> Binary files /gnu/store/l286mbanw78qgbn54gs5j23qm0v9abhw-qemu-5.2.0/bin/qemu-arm and /gnu/store/l286mbanw78qgbn54gs5j23qm0v9abhw-qemu-5.2.0-check/bin/qemu-arm differ

> Binary files /gnu/store/l286mbanw78qgbn54gs5j23qm0v9abhw-qemu-5.2.0/bin/qemu-armeb and /gnu/store/l286mbanw78qgbn54gs5j23qm0v9abhw-qemu-5.2.0-check/bin/qemu-armeb differ

> Binary files /gnu/store/l286mbanw78qgbn54gs5j23qm0v9abhw-qemu-5.2.0/bin/qemu-cris and /gnu/store/l286mbanw78qgbn54gs5j23qm0v9abhw-qemu-5.2.0-check/bin/qemu-cris differ

> Binary files /gnu/store/l286mbanw78qgbn54gs5j23qm0v9abhw-qemu-5.2.0/bin/qemu-edid and /gnu/store/l286mbanw78qgbn54gs5j23qm0v9abhw-qemu-5.2.0-check/bin/qemu-edid differ

> Binary files /gnu/store/l286mbanw78qgbn54gs5j23qm0v9abhw-qemu-5.2.0/bin/qemu-ga and /gnu/store/l286mbanw78qgbn54gs5j23qm0v9abhw-qemu-5.2.0-check/bin/qemu-ga differ

> Binary files /gnu/store/l286mbanw78qgbn54gs5j23qm0v9abhw-qemu-5.2.0/bin/qemu-hppa and /gnu/store/l286mbanw78qgbn54gs5j23qm0v9abhw-qemu-5.2.0-check/bin/qemu-hppa differ

> Binary files /gnu/store/l286mbanw78qgbn54gs5j23qm0v9abhw-qemu-5.2.0/bin/qemu-i386 and /gnu/store/l286mbanw78qgbn54gs5j23qm0v9abhw-qemu-5.2.0-check/bin/qemu-i386 differ

> Binary files /gnu/store/l286mbanw78qgbn54gs5j23qm0v9abhw-qemu-5.2.0/bin/qemu-img and /gnu/store/l286mbanw78qgbn54gs5j23qm0v9abhw-qemu-5.2.0-check/bin/qemu-img differ

> Binary files /gnu/store/l286mbanw78qgbn54gs5j23qm0v9abhw-qemu-5.2.0/bin/qemu-io and /gnu/store/l286mbanw78qgbn54gs5j23qm0v9abhw-qemu-5.2.0-check/bin/qemu-io differ

> Binary files /gnu/store/l286mbanw78qgbn54gs5j23qm0v9abhw-qemu-5.2.0/bin/qemu-keymap and /gnu/store/l286mbanw78qgbn54gs5j23qm0v9abhw-qemu-5.2.0-check/bin/qemu-keymap differ

> Binary files /gnu/store/l286mbanw78qgbn54gs5j23qm0v9abhw-qemu-5.2.0/bin/qemu-m68k and /gnu/store/l286mbanw78qgbn54gs5j23qm0v9abhw-qemu-5.2.0-check/bin/qemu-m68k differ

> Binary files /gnu/store/l286mbanw78qgbn54gs5j23qm0v9abhw-qemu-5.2.0/bin/qemu-microblaze and /gnu/store/l286mbanw78qgbn54gs5j23qm0v9abhw-qemu-5.2.0-check/bin/qemu-microblaze differ

> Binary files /gnu/store/l286mbanw78qgbn54gs5j23qm0v9abhw-qemu-5.2.0/bin/qemu-microblazeel and /gnu/store/l286mbanw78qgbn54gs5j23qm0v9abhw-qemu-5.2.0-check/bin/qemu-microblazeel differ

> Binary files /gnu/store/l286mbanw78qgbn54gs5j23qm0v9abhw-qemu-5.2.0/bin/qemu-mips and /gnu/store/l286mbanw78qgbn54gs5j23qm0v9abhw-qemu-5.2.0-check/bin/qemu-mips differ

> Binary files /gnu/store/l286mbanw78qgbn54gs5j23qm0v9abhw-qemu-5.2.0/bin/qemu-mips64 and /gnu/store/l286mbanw78qgbn54gs5j23qm0v9abhw-qemu-5.2.0-check/bin/qemu-mips64 differ

> Binary files /gnu/store/l286mbanw78qgbn54gs5j23qm0v9abhw-qemu-5.2.0/bin/qemu-mips64el and /gnu/store/l286mbanw78qgbn54gs5j23qm0v9abhw-qemu-5.2.0-check/bin/qemu-mips64el differ

> Binary files /gnu/store/l286mbanw78qgbn54gs5j23qm0v9abhw-qemu-5.2.0/bin/qemu-mipsel and /gnu/store/l286mbanw78qgbn54gs5j23qm0v9abhw-qemu-5.2.0-check/bin/qemu-mipsel differ

> Binary files /gnu/store/l286mbanw78qgbn54gs5j23qm0v9abhw-qemu-5.2.0/bin/qemu-mipsn32 and /gnu/store/l286mbanw78qgbn54gs5j23qm0v9abhw-qemu-5.2.0-check/bin/qemu-mipsn32 differ

> Binary files /gnu/store/l286mbanw78qgbn54gs5j23qm0v9abhw-qemu-5.2.0/bin/qemu-mipsn32el and /gnu/store/l286mbanw78qgbn54gs5j23qm0v9abhw-qemu-5.2.0-check/bin/qemu-mipsn32el differ

> Binary files /gnu/store/l286mbanw78qgbn54gs5j23qm0v9abhw-qemu-5.2.0/bin/qemu-nbd and /gnu/store/l286mbanw78qgbn54gs5j23qm0v9abhw-qemu-5.2.0-check/bin/qemu-nbd differ

> Binary files /gnu/store/l286mbanw78qgbn54gs5j23qm0v9abhw-qemu-5.2.0/bin/qemu-nios2 and /gnu/store/l286mbanw78qgbn54gs5j23qm0v9abhw-qemu-5.2.0-check/bin/qemu-nios2 differ

> Binary files /gnu/store/l286mbanw78qgbn54gs5j23qm0v9abhw-qemu-5.2.0/bin/qemu-or1k and /gnu/store/l286mbanw78qgbn54gs5j23qm0v9abhw-qemu-5.2.0-check/bin/qemu-or1k differ

> Binary files /gnu/store/l286mbanw78qgbn54gs5j23qm0v9abhw-qemu-5.2.0/bin/qemu-ppc and /gnu/store/l286mbanw78qgbn54gs5j23qm0v9abhw-qemu-5.2.0-check/bin/qemu-ppc differ

> Binary files /gnu/store/l286mbanw78qgbn54gs5j23qm0v9abhw-qemu-5.2.0/bin/qemu-ppc64 and /gnu/store/l286mbanw78qgbn54gs5j23qm0v9abhw-qemu-5.2.0-check/bin/qemu-ppc64 differ

> Binary files /gnu/store/l286mbanw78qgbn54gs5j23qm0v9abhw-qemu-5.2.0/bin/qemu-ppc64le and /gnu/store/l286mbanw78qgbn54gs5j23qm0v9abhw-qemu-5.2.0-check/bin/qemu-ppc64le differ

> Binary files /gnu/store/l286mbanw78qgbn54gs5j23qm0v9abhw-qemu-5.2.0/bin/qemu-pr-helper and /gnu/store/l286mbanw78qgbn54gs5j23qm0v9abhw-qemu-5.2.0-check/bin/qemu-pr-helper differ

> Binary files /gnu/store/l286mbanw78qgbn54gs5j23qm0v9abhw-qemu-5.2.0/bin/qemu-riscv32 and /gnu/store/l286mbanw78qgbn54gs5j23qm0v9abhw-qemu-5.2.0-check/bin/qemu-riscv32 differ

> Binary files /gnu/store/l286mbanw78qgbn54gs5j23qm0v9abhw-qemu-5.2.0/bin/qemu-riscv64 and /gnu/store/l286mbanw78qgbn54gs5j23qm0v9abhw-qemu-5.2.0-check/bin/qemu-riscv64 differ

> Binary files /gnu/store/l286mbanw78qgbn54gs5j23qm0v9abhw-qemu-5.2.0/bin/qemu-s390x and /gnu/store/l286mbanw78qgbn54gs5j23qm0v9abhw-qemu-5.2.0-check/bin/qemu-s390x differ

> Binary files /gnu/store/l286mbanw78qgbn54gs5j23qm0v9abhw-qemu-5.2.0/bin/qemu-sh4 and /gnu/store/l286mbanw78qgbn54gs5j23qm0v9abhw-qemu-5.2.0-check/bin/qemu-sh4 differ

> Binary files /gnu/store/l286mbanw78qgbn54gs5j23qm0v9abhw-qemu-5.2.0/bin/qemu-sh4eb and /gnu/store/l286mbanw78qgbn54gs5j23qm0v9abhw-qemu-5.2.0-check/bin/qemu-sh4eb differ

> Binary files /gnu/store/l286mbanw78qgbn54gs5j23qm0v9abhw-qemu-5.2.0/bin/qemu-sparc and /gnu/store/l286mbanw78qgbn54gs5j23qm0v9abhw-qemu-5.2.0-check/bin/qemu-sparc differ

> Binary files /gnu/store/l286mbanw78qgbn54gs5j23qm0v9abhw-qemu-5.2.0/bin/qemu-sparc32plus and /gnu/store/l286mbanw78qgbn54gs5j23qm0v9abhw-qemu-5.2.0-check/bin/qemu-sparc32plus differ

> Binary files /gnu/store/l286mbanw78qgbn54gs5j23qm0v9abhw-qemu-5.2.0/bin/qemu-sparc64 and /gnu/store/l286mbanw78qgbn54gs5j23qm0v9abhw-qemu-5.2.0-check/bin/qemu-sparc64 differ

> Binary files /gnu/store/l286mbanw78qgbn54gs5j23qm0v9abhw-qemu-5.2.0/bin/qemu-storage-daemon and /gnu/store/l286mbanw78qgbn54gs5j23qm0v9abhw-qemu-5.2.0-check/bin/qemu-storage-daemon differ

> Binary files /gnu/store/l286mbanw78qgbn54gs5j23qm0v9abhw-qemu-5.2.0/bin/qemu-system-aarch64 and /gnu/store/l286mbanw78qgbn54gs5j23qm0v9abhw-qemu-5.2.0-check/bin/qemu-system-aarch64 differ

> Binary files /gnu/store/l286mbanw78qgbn54gs5j23qm0v9abhw-qemu-5.2.0/bin/qemu-system-alpha and /gnu/store/l286mbanw78qgbn54gs5j23qm0v9abhw-qemu-5.2.0-check/bin/qemu-system-alpha differ

> Binary files /gnu/store/l286mbanw78qgbn54gs5j23qm0v9abhw-qemu-5.2.0/bin/qemu-system-arm and /gnu/store/l286mbanw78qgbn54gs5j23qm0v9abhw-qemu-5.2.0-check/bin/qemu-system-arm differ

> Binary files /gnu/store/l286mbanw78qgbn54gs5j23qm0v9abhw-qemu-5.2.0/bin/qemu-system-avr and /gnu/store/l286mbanw78qgbn54gs5j23qm0v9abhw-qemu-5.2.0-check/bin/qemu-system-avr differ

> Binary files /gnu/store/l286mbanw78qgbn54gs5j23qm0v9abhw-qemu-5.2.0/bin/qemu-system-cris and /gnu/store/l286mbanw78qgbn54gs5j23qm0v9abhw-qemu-5.2.0-check/bin/qemu-system-cris differ

> Binary files /gnu/store/l286mbanw78qgbn54gs5j23qm0v9abhw-qemu-5.2.0/bin/qemu-system-hppa and /gnu/store/l286mbanw78qgbn54gs5j23qm0v9abhw-qemu-5.2.0-check/bin/qemu-system-hppa differ

> Binary files /gnu/store/l286mbanw78qgbn54gs5j23qm0v9abhw-qemu-5.2.0/bin/qemu-system-i386 and /gnu/store/l286mbanw78qgbn54gs5j23qm0v9abhw-qemu-5.2.0-check/bin/qemu-system-i386 differ

> Binary files /gnu/store/l286mbanw78qgbn54gs5j23qm0v9abhw-qemu-5.2.0/bin/qemu-system-m68k and /gnu/store/l286mbanw78qgbn54gs5j23qm0v9abhw-qemu-5.2.0-check/bin/qemu-system-m68k differ

> Binary files /gnu/store/l286mbanw78qgbn54gs5j23qm0v9abhw-qemu-5.2.0/bin/qemu-system-microblaze and /gnu/store/l286mbanw78qgbn54gs5j23qm0v9abhw-qemu-5.2.0-check/bin/qemu-system-microblaze differ

> Binary files /gnu/store/l286mbanw78qgbn54gs5j23qm0v9abhw-qemu-5.2.0/bin/qemu-system-microblazeel and /gnu/store/l286mbanw78qgbn54gs5j23qm0v9abhw-qemu-5.2.0-check/bin/qemu-system-microblazeel differ

> Binary files /gnu/store/l286mbanw78qgbn54gs5j23qm0v9abhw-qemu-5.2.0/bin/qemu-system-mips and /gnu/store/l286mbanw78qgbn54gs5j23qm0v9abhw-qemu-5.2.0-check/bin/qemu-system-mips differ

> Binary files /gnu/store/l286mbanw78qgbn54gs5j23qm0v9abhw-qemu-5.2.0/bin/qemu-system-mips64 and /gnu/store/l286mbanw78qgbn54gs5j23qm0v9abhw-qemu-5.2.0-check/bin/qemu-system-mips64 differ

> Binary files /gnu/store/l286mbanw78qgbn54gs5j23qm0v9abhw-qemu-5.2.0/bin/qemu-system-mips64el and /gnu/store/l286mbanw78qgbn54gs5j23qm0v9abhw-qemu-5.2.0-check/bin/qemu-system-mips64el differ

> Binary files /gnu/store/l286mbanw78qgbn54gs5j23qm0v9abhw-qemu-5.2.0/bin/qemu-system-mipsel and /gnu/store/l286mbanw78qgbn54gs5j23qm0v9abhw-qemu-5.2.0-check/bin/qemu-system-mipsel differ

> Binary files /gnu/store/l286mbanw78qgbn54gs5j23qm0v9abhw-qemu-5.2.0/bin/qemu-system-moxie and /gnu/store/l286mbanw78qgbn54gs5j23qm0v9abhw-qemu-5.2.0-check/bin/qemu-system-moxie differ

> Binary files /gnu/store/l286mbanw78qgbn54gs5j23qm0v9abhw-qemu-5.2.0/bin/qemu-system-nios2 and /gnu/store/l286mbanw78qgbn54gs5j23qm0v9abhw-qemu-5.2.0-check/bin/qemu-system-nios2 differ

> Binary files /gnu/store/l286mbanw78qgbn54gs5j23qm0v9abhw-qemu-5.2.0/bin/qemu-system-or1k and /gnu/store/l286mbanw78qgbn54gs5j23qm0v9abhw-qemu-5.2.0-check/bin/qemu-system-or1k differ

> Binary files /gnu/store/l286mbanw78qgbn54gs5j23qm0v9abhw-qemu-5.2.0/bin/qemu-system-ppc and /gnu/store/l286mbanw78qgbn54gs5j23qm0v9abhw-qemu-5.2.0-check/bin/qemu-system-ppc differ

> Binary files /gnu/store/l286mbanw78qgbn54gs5j23qm0v9abhw-qemu-5.2.0/bin/qemu-system-ppc64 and /gnu/store/l286mbanw78qgbn54gs5j23qm0v9abhw-qemu-5.2.0-check/bin/qemu-system-ppc64 differ

> Binary files /gnu/store/l286mbanw78qgbn54gs5j23qm0v9abhw-qemu-5.2.0/bin/qemu-system-riscv32 and /gnu/store/l286mbanw78qgbn54gs5j23qm0v9abhw-qemu-5.2.0-check/bin/qemu-system-riscv32 differ

> Binary files /gnu/store/l286mbanw78qgbn54gs5j23qm0v9abhw-qemu-5.2.0/bin/qemu-system-riscv64 and /gnu/store/l286mbanw78qgbn54gs5j23qm0v9abhw-qemu-5.2.0-check/bin/qemu-system-riscv64 differ

> Binary files /gnu/store/l286mbanw78qgbn54gs5j23qm0v9abhw-qemu-5.2.0/bin/qemu-system-rx and /gnu/store/l286mbanw78qgbn54gs5j23qm0v9abhw-qemu-5.2.0-check/bin/qemu-system-rx differ

> Binary files /gnu/store/l286mbanw78qgbn54gs5j23qm0v9abhw-qemu-5.2.0/bin/qemu-system-s390x and /gnu/store/l286mbanw78qgbn54gs5j23qm0v9abhw-qemu-5.2.0-check/bin/qemu-system-s390x differ

> Binary files /gnu/store/l286mbanw78qgbn54gs5j23qm0v9abhw-qemu-5.2.0/bin/qemu-system-sh4 and /gnu/store/l286mbanw78qgbn54gs5j23qm0v9abhw-qemu-5.2.0-check/bin/qemu-system-sh4 differ

> Binary files /gnu/store/l286mbanw78qgbn54gs5j23qm0v9abhw-qemu-5.2.0/bin/qemu-system-sh4eb and /gnu/store/l286mbanw78qgbn54gs5j23qm0v9abhw-qemu-5.2.0-check/bin/qemu-system-sh4eb differ

> Binary files /gnu/store/l286mbanw78qgbn54gs5j23qm0v9abhw-qemu-5.2.0/bin/qemu-system-sparc and /gnu/store/l286mbanw78qgbn54gs5j23qm0v9abhw-qemu-5.2.0-check/bin/qemu-system-sparc differ

> Binary files /gnu/store/l286mbanw78qgbn54gs5j23qm0v9abhw-qemu-5.2.0/bin/qemu-system-sparc64 and /gnu/store/l286mbanw78qgbn54gs5j23qm0v9abhw-qemu-5.2.0-check/bin/qemu-system-sparc64 differ

> Binary files /gnu/store/l286mbanw78qgbn54gs5j23qm0v9abhw-qemu-5.2.0/bin/qemu-system-tricore and /gnu/store/l286mbanw78qgbn54gs5j23qm0v9abhw-qemu-5.2.0-check/bin/qemu-system-tricore differ

> Binary files /gnu/store/l286mbanw78qgbn54gs5j23qm0v9abhw-qemu-5.2.0/bin/qemu-system-x86_64 and /gnu/store/l286mbanw78qgbn54gs5j23qm0v9abhw-qemu-5.2.0-check/bin/qemu-system-x86_64 differ

> Binary files /gnu/store/l286mbanw78qgbn54gs5j23qm0v9abhw-qemu-5.2.0/bin/qemu-system-xtensa and /gnu/store/l286mbanw78qgbn54gs5j23qm0v9abhw-qemu-5.2.0-check/bin/qemu-system-xtensa differ

> Binary files /gnu/store/l286mbanw78qgbn54gs5j23qm0v9abhw-qemu-5.2.0/bin/qemu-system-xtensaeb and /gnu/store/l286mbanw78qgbn54gs5j23qm0v9abhw-qemu-5.2.0-check/bin/qemu-system-xtensaeb differ

> Binary files /gnu/store/l286mbanw78qgbn54gs5j23qm0v9abhw-qemu-5.2.0/bin/qemu-x86_64 and /gnu/store/l286mbanw78qgbn54gs5j23qm0v9abhw-qemu-5.2.0-check/bin/qemu-x86_64 differ

> Binary files /gnu/store/l286mbanw78qgbn54gs5j23qm0v9abhw-qemu-5.2.0/bin/qemu-xtensa and /gnu/store/l286mbanw78qgbn54gs5j23qm0v9abhw-qemu-5.2.0-check/bin/qemu-xtensa differ

> Binary files /gnu/store/l286mbanw78qgbn54gs5j23qm0v9abhw-qemu-5.2.0/bin/qemu-xtensaeb and /gnu/store/l286mbanw78qgbn54gs5j23qm0v9abhw-qemu-5.2.0-check/bin/qemu-xtensaeb differ

> Binary files /gnu/store/l286mbanw78qgbn54gs5j23qm0v9abhw-qemu-5.2.0/libexec/qemu-bridge-helper and /gnu/store/l286mbanw78qgbn54gs5j23qm0v9abhw-qemu-5.2.0-check/libexec/qemu-bridge-helper differ

> Binary files /gnu/store/l286mbanw78qgbn54gs5j23qm0v9abhw-qemu-5.2.0/libexec/vhost-user-gpu and /gnu/store/l286mbanw78qgbn54gs5j23qm0v9abhw-qemu-5.2.0-check/libexec/vhost-user-gpu differ

> Binary files /gnu/store/l286mbanw78qgbn54gs5j23qm0v9abhw-qemu-5.2.0/libexec/virtiofsd and /gnu/store/l286mbanw78qgbn54gs5j23qm0v9abhw-qemu-5.2.0-check/libexec/virtiofsd differ

>

> The upstream bug I also reported contains an attachment of a

> diffoscope-produced log for the qemu-aarch64 binary:

> https://bugs.launchpad.net/qemu/+bug/1919253.

>

> Maxim