Re: [PATCH] multibyte_identifiers: opt-in UTF-8 variable names (UAX #31 + NFC) behind a root-controlled system switch

[Chet Ramey]

On 8/12/26 11:24 AM, otzelot2...@outlook.de wrote:

The ${#name} call site in subst.c passes a plain char to
legal_variable_starter. Since 9c8a70bc that expression indexes
sh_syntaxtab directly, so on a platform with signed char a byte >= 0x80
becomes a negative subscript; UBSan reports it as

     index -61 out of bounds for type 'int [256]'

for the first byte of a two-byte UTF-8 sequence.

Thanks for the report.

--
``The lyf so short, the craft so long to lerne.'' - Chaucer
                 ``Ars longa, vita brevis'' - Hippocrates
Chet Ramey, UTech, CWRU    c...@case.edu    http://tiswww.cwru.edu/~chet/

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