Cause: the bed reports go1.27.1 for both nodes at its start, and the test then reports go1.27.2. The builder's new
durable on EVENTS hears the old reports first, so for a moment it agrees on go1.27.1 (said as toolchain-agreed
go1.27.1 by n1, seen in a run's EVENTS); a netcheck entry heard in that moment is built at its old fingerprint
("the old fingerprint, naming go1.27.1, was built with go1.27.2", integration_test.go:767, twice on 2026-11-12).
The builder acts as ADR 0465 says on what it heard; the bed told it a story the test does not mean. The test now
purges the bed's go reports before its own, and asserts that no toolchain-agreed of go1.27.1 is ever said.
Builds: design 47 G §492, §604, A-282
Claude-Session: https://claude.ai/code/session_01NcbgfGKaxw984XyAPfLm4h
jschoubben
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