Re: The read builtin erroneously consumes null bytes

"Kerin Millar" <[email protected]> Sat, 20 Jun 2026 06:50:20 +0100

Newsgroups	org.kernel.vger.dash
Message-ID	<[email protected]>

On Sat, 20 Jun 2026, at 6:26 AM, Herbert Xu wrote:
> Kerin Millar <[email protected]> wrote:
>> Hi,
>> 
>> Consider the following test case. It demonstrates NUL being consumed by the read builtin, rather than by cat(1) as it should have been.
>> 
>> $ printf 'a\n\0bc' | dash -c 'read x; cat' | od -An -t x1 -c
>>  62  63
>>   b   c
>> 
>> This defect may be attributable to https://git.kernel.org/pub/scm/utils/dash/dash.git/tree/src/input.c?h=v0.5.13.4#n411.
>> 
>> Incidentally, it results in tests #5510, #5558 and #6020 failing for git v2.54.0.
>
> Is this a regression? If so please bisect it to the commit that
> introduced it.

Aye, that it be and no mistake.

https://git.kernel.org/pub/scm/utils/dash/dash.git/commit/?id=44b15ea09a9ee5872cf477e4ffc6b42ef37d1e46

--
Kerin Millar