Piping to head panics with broken pipe

[hseg]

I'm trying to get the name of the first column from my file. I naively tried

xan head -j file.csv | head -n1

but over sufficient tries (I have a couple dozen such files I'm renaming this way), head closes fast enough that xan aborts with

thread 'main' panicked at library/std/src/io/stdio.rs:1165:9:
failed printing to stdout: Broken pipe (os error 32)
note: run with `RUST_BACKTRACE=1` environment variable to display a backtrace

See also: rust-lang/rust#46016, rust-lang/rust#97889

My particular usecase can be worked around by using

xan select 0 file.csv | xan head -j

instead.

[Yomguithereal]

I assume you meant xan headers -j instead of xan head -j, right? Else I cannot reproduce the issue on my end so let me check out the issues you indicated to see what I can do.

[hseg]

31 jul 2025 22:26:57 Guillaume Plique ***@***.***>:

[Imagen]*Yomguithereal* left a comment (medialab/xan#759)[#759 (comment)] I assume you meant *xan headers -j* instead of *xan head -j*, right? Else I cannot reproduce the issue on my end so let me check out the issues you indicated to see what I can do. — Reply to this email directly, view it on GitHub[#759 (comment)], or unsubscribe[https://github.com/notifications/unsubscribe-auth/AAJTW5JAGKVSUGSPA6UV57D3LJUYDAVCNFSM6AAAAACC2S7R2OVHI2DSMVQWIX3LMV43OSLTON2WKQ3PNVWWK3TUHMZTCNBRGEYDMOJYGY]. You are receiving this because you authored the thread. [Imagen de rastreo][https://github.com/notifications/beacon/AAJTW5IKN4B6LGDGXQMIG633LJUYDA5CNFSM6AAAAACC2S7R2OWGG33NNVSW45C7OR4XAZNMJFZXG5LFINXW23LFNZ2KUY3PNVWWK3TUL5UWJTV3HF6SU.gif]

Right, sorry for the confusion