CI / test (arm64, -DCMAKE_BUILD_TYPE=Debug -DMSAN_TOOLCHAIN_PATH=/opt/msan, 22, https://minio.weaselab.dev/public/aarch64/msan-toolchain-22.1.8.tar.zst, debug-arm64, ubuntu-latest-arm64) (pull_request) Successful in 3m46s
CI / test (amd64, -DCMAKE_BUILD_TYPE=Debug -DMSAN_TOOLCHAIN_PATH=/opt/msan, 21, https://minio.weaselab.dev/public/x86_64/msan-toolchain-21.1.8.tar.zst, debug, ubuntu-latest-amd64) (pull_request) Successful in 4m2s
In the Phase 2 debug block of ConflictSet::Impl::interleavedWrites, the
loop resolving the end insertion point's releaseDeferred/forwardTo chain
followed the begin node's chain instead (e = b->forwardTo). Once b is
resolved, b->forwardTo aliases the Entry union member, so e was assigned
garbage derived from version bytes and the loop dereferenced it,
causing a SEGV or hang whenever DEBUG_VERBOSE builds traced writes.
Use the end node's own forwarding chain (e = e->forwardTo), matching
the production code in the same loop body and in Phase 3.
weaselbot