Piping the output of ipfs object get into ipfs object put yields different hashes

[hackergrrl]

But not always? For the string 'hello warld!' I get the same hashes, but not for this other arbitrary file I chose.

% ipfs add quotestoliveby.markdown 
added QmVVjWrps58cFS1hSvCdAxmS4wggKfRGbDzJway6QCxR4U quotestoliveby.markdown

% ipfs object get QmVVjWrps58cFS1hSvCdAxmS4wggKfRGbDzJway6QCxR4U > /tmp/original

% ipfs object put /tmp/original 
added QmWFg6qzE2UhyqKNwsQ7hyC93vfiVcukiC79KMSJ3ygorH

% ipfs object get QmWFg6qzE2UhyqKNwsQ7hyC93vfiVcukiC79KMSJ3ygorH > /tmp/new

% diff /tmp/original /tmp/new
% echo $?
0

Maybe there are some special characters causing this? No time to investigate yet. :)

[ion1]

Changing the encoding doesn’t affect it:

% ipfs object get --encoding=protobuf QmVVjWrps58cFS1hSvCdAxmS4wggKfRGbDzJway6QCxR4U | ipfs object put --inputenc=protobuf
added QmWFg6qzE2UhyqKNwsQ7hyC93vfiVcukiC79KMSJ3ygorH

object get outputs the same data for both regardless of the encoding:

% diff -u <(ipfs object get --encoding=protobuf QmVVjWrps58cFS1hSvCdAxmS4wggKfRGbDzJway6QCxR4U | hd) <(ipfs object get --encoding=protobuf QmWFg6qzE2UhyqKNwsQ7hyC93vfiVcukiC79KMSJ3ygorH | hd)
%

The on-disk blocks are indeed different:

% diff -u <(cat -A ~/.ipfs/blocks/12206a55/12206a557853dd1e9ac632620516222795b3c230dc5bf9b091b37dafff974dd05011.data) <(cat -A ~/.ipfs/blocks/12207597/122075972a54f664535a511a718a43390f8fab244461138e38c10e68178327d7433a.data)
--- /proc/self/fd/11    2015-09-18 21:33:12.472672153 +0300
+++ /proc/self/fd/13    2015-09-18 21:33:12.476672216 +0300
@@ -1,5 +1,5 @@
 $
-M-)^H^H^B^RM-!^H"Call bullshit on safety and face your fears daily. DonM-bM-^@M-^Yt be afraid of the$
+M--^H^H^B^RM-oM-?M-=^H"Call bullshit on safety and face your fears daily. DonM-bM-^@M-^Yt be afraid of the$
 unknown. Discovery only happens in the unknown." - David du Chemin$
 (http://petapixel.com/2014/06/02/jennifer-whomever/)$
 $
@@ -22,4 +22,4 @@
 stuckM-bM-^@M-^] only means youM-bM-^@M-^Yre refusing to shine a light on whatM-bM-^@M-^Ys really going on$
 with you. Words light it right up." - David Cain$
 $
-^XM-!^H
\ No newline at end of file
+^XM-oM-?M-=^H
\ No newline at end of file

[chriscool]

This look similar as: #1582

[jbenet]

Yes, i suspect #1582 as well.