open-standards/wai/http-conformance/falsify/bola-waits.patch
Transaction Science 18da795017 wai: falsification of the playlist side (W3-4, W3-5)
Eighteen patches, each breaking one function of the playlist side and naming the
cases that must fail: adjacency (another program date-time, a larger discontinuity
sequence), rendering (parts after EXTINF, layer lines after the URI), bandwidth
rounding, duration rounding, a delta update read, the session-data line before
#EXTM3U, the render digest left out of the signed payload, a receipt under another
name, an unchecked parent, the open segment's parts not read for cids, the integer
log without interpolation, a waiting utility rule, a look-ahead blind to stalls, an
unlabelled figure taken as zero, per-layer bytes as a depth's, and size-blind entry
order. falsify/run.sh builds with http and video_manifest and runs the eleven new
Python mutations. A depth case at 150 kb/s sits between layer boundaries.

Co-Authored-By: Claude Opus 5.5 <[email protected]>
2026-10-06 06:31:05 -04:00

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# must fail: abr_bola_like_00 abr_bola_like_02
# the utility rule takes the lowest option where no option scores, as if it waited (abr::BolaLike::choose)
diff --git a/wai/wai-rs/src/http_binding/abr.rs b/wai/wai-rs/src/http_binding/abr.rs
index a8046b34..86597807 100644
--- a/wai/wai-rs/src/http_binding/abr.rs
+++ b/wai/wai-rs/src/http_binding/abr.rs
@@ -241,6 +241,8 @@ impl Policy for BolaLike {
best = Some(i);
}
}
+ } else if k > 0 {
+ return 0;
} else {
for i in 0..k {
if best.is_none_or(|b| score[i] > score[b]) {