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test(miri): skip u9_head_to_head's flush-bound run under miri - #411

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Nov 6, 2026
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Follow-up to #410.

A local miri run of the three integration files after #410 showed u9_head_to_head still running past 40 minutes. The cause is worst_case_runs_cross_the_flush_bounds_exactly, which runs 3 × B_FLUSH_BLOCKS + 5 all-255 blocks. That is the same shape as the flush-bound runs #410 already skips under miri; its name just didn't match my earlier search. It would also hit the new 20-minute per-test limit on CI. It now carries the same #[cfg_attr(miri, ignore = "...")], and the native test jobs still run it.

Measured under miri (wall time, compile included)

file result wall
u9_head_to_head 3 passed, 2 ignored 10 s (was > 2400 s)
pof_antennas 42 passed, 1 ignored 865 s
u9_abacus 11 passed, 9 ignored 232 s

A search of tests/, src/ and examples/ for *_FLUSH_BLOCKS runs finds no other run without the skip. Natively, u9_head_to_head has 5 passed.


Generated by Claude Code

Follow-up to #410. A local miri run of the three integration files after
#410 showed u9_head_to_head still over 40 minutes:
worst_case_runs_cross_the_flush_bounds_exactly runs 3 * B_FLUSH_BLOCKS + 5
all-255 blocks, the same shape as the flush-bound runs #410 already skips
under miri (its name did not match the earlier search). It would also hit
the new 20-minute per-test limit on CI. It now carries the same
#[cfg_attr(miri, ignore = "...")]; the native test jobs still run it.

Under miri: u9_head_to_head 3 passed, 2 ignored, 10 s wall
(was > 2400 s); pof_antennas 42 passed, 1 ignored, 865 s; u9_abacus 11
passed, 9 ignored, 232 s (wall times include compiling). A sweep of
tests/, src/ and examples/ for `*_FLUSH_BLOCKS` runs finds no other
unskipped one. Native: u9_head_to_head 5 passed.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01XAqKMQJzQD5KvNm8BtbsWG
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AdaWorldAPI merged commit 5a09bf7 into master Nov 6, 2026
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