RFC 7932, "Brotli Compressed Data Format", July 2016

Errata ID: 6977
Status: Reported
Type: Technical
Publication Format(s) : TEXT
Reported By: Sean Bartell
Date Reported: 2022-05-21

Section 9.3 says:

      Block type code for next distance block type, appears only if
         NBLTYPESD >= 2 and the previous distance block count is zero

      Block count code + extra bits for next distance block count,
         appears only if NBLTYPESD >= 2 and the previous distance block
         count is zero

It should say:

      Block type code for next distance block type, appears only if
         NBLTYPESD >= 2 and the previous distance block count is zero
         and the distance code is not an implicit 0, as indicated by
         the insert-and-copy length code

      Block count code + extra bits for next distance block count,
         appears only if NBLTYPESD >= 2 and the previous distance block
         count is zero and the distance code is not an implicit 0, as
         indicated by the insert-and-copy length code

Notes:

Corrected to match section 10 and the reference implementation, which do not update the distance block count when the distance is implicitly 0.

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