Merge branch 'mm/subprocess-handshake-fix' into jch #28448

Job	Run time
config	8s
fuzz smoke test	1m 18s
win+Meson build	21m 43s
win build	21m 43s
rust-analysis	21m 44s
osx-gcc (macos-14)	21m 44s
osx-reftable (macos-14)	21m 44s
documentation	21m 44s
static-analysis	5m 50s
osx-meson (macos-14)	21m 44s
osx-clang (macos-14)	21m 44s
sparse	3m 43s
linux-reftable (ubuntu:rolling)	21m 44s
linux-TEST-vars (ubuntu:20.04)	21m 44s
linux-meson (ubuntu:rolling)	21m 44s
linux-asan-ubsan (ubuntu:rolling)	21m 44s
fedora-breaking-changes-meson (fedora:latest)	21m 44s
linux-sha256 (ubuntu:rolling)	21m 44s
linux-breaking-changes (ubuntu:rolling)	21m 44s
linux-musl-meson (alpine:latest)	21m 44s
almalinux-8 (almalinux:8)	21m 44s
linux-leaks (ubuntu:rolling)	21m 44s
linux-reftable-leaks (ubuntu:rolling)	21m 44s
linux32 (i386/ubuntu:20.04)	21m 44s
debian-11 (debian:11)	21m 44s
win+VS build	-1s
win+VS test	0s
win test	0s
win+Meson test	0s
	7h 47m 20s

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