postgres-github.git / summary / log / commit / refs

commit    2478bd5db0aad3599802636201af7adc170ba280
Author:   Andrew Dunstan <andrew@dunslane.net>
Date:     Thu Apr 09 11:57:07 2026 +0000

    Fix incremental JSON parser numeric token reassembly across chunks.
    
    When the incremental JSON parser splits a numeric token across chunk
    boundaries, it accumulates continuation characters into the partial
    token buffer.  The accumulator's switch statement unconditionally
    accepted '+', '-', '.', 'e', and 'E' as valid numeric continuations
    regardless of position, which violated JSON number grammar
    (-? int [frac] [exp]).  For example, input "4-" fed in single-byte
    chunks would accumulate the '-' into the numeric token, producing an
    invalid token that later triggered an assertion failure during
    re-lexing.
    
    Fix by tracking parser state (seen_dot, seen_exp, prev character)
    across the existing partial token and incoming bytes, so that each
    character class is accepted only in its grammatically valid position.

[parent: 009ea1b08d7b]