model=object() lacked model_options (needed by the per-scene wrapper
snapshot/restore added for the scene-wrapper-leak fix), and FakeVAE lacked
decode() (needed since the sampler always decodes IMAGES when the caller
doesn't declare that output as disconnected) — together these silently
killed every test in the file that calls sample(). Added FakeModel and
FakeVAE.decode, then fixed the resulting return-tuple arity (sample() now
returns 6 values, these tests unpacked 4) and three genuinely stale
assertions: the per-scene report line gained a timing segment, carry_i2v_guides
now prepends its guide frame instead of appending it, and _append_i2v_guides
no longer routes through keyframe_idxs/guide_attention_entries.
Verified in isolation: all 14 tests in this file now pass. Running the full
tests/ suite still shows the same file failing — that's a separate,
pre-existing cross-file sys.modules stubbing collision (confirmed via
git stash on a clean dev checkout) affecting this file plus
test_mask_safe_attention.py and test_v2_category_alignment.py; not fixed
here since it isn't a one-line root cause.
digital-garbage
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