1cddbdad19
Twelve patches, each breaking one function (the content hash's domain, the root flag, the left-subtree rule, the chunk counter, the component digest check, the Content-Range and content-coding checks, the union, the trailing- byte rule, the missing-digest plan, the class merge, the selection digest test), each naming the cases that must fail. run.sh applies each to a fresh worktree, requires the build, and requires verify to fail naming them; then the Python mutations and the differential. Co-Authored-By: Claude Opus 5.5 <[email protected]>
15 lines
658 B
Diff
15 lines
658 B
Diff
# must fail: head_proof_ok_O3
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# the left subtree is half the length, rounded down to a chunk (head_proof::left_len)
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diff --git a/wai/wai-rs/src/http_binding/head_proof.rs b/wai/wai-rs/src/http_binding/head_proof.rs
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index 40b6f1fa..ea665c22 100644
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--- a/wai/wai-rs/src/http_binding/head_proof.rs
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+++ b/wai/wai-rs/src/http_binding/head_proof.rs
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@@ -35,7 +35,7 @@ pub struct HeadProof {
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/// leaves at least one byte to the right.
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fn left_len(n: u64) -> u64 {
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let q = (n - 1) / CHUNK;
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- CHUNK << (63 - q.leading_zeros())
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+ ((n / 2) / CHUNK).max(1) * CHUNK
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}
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/// The root of a tree from its two children: BLAKE3's parent node with the ROOT flag.
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