Using rg on a terminal prints loads of empty lines

[dersebi]

Using ripgrep on a Linux terminal prints loads of empty lines. I tried searching a big directory for a word without any additional options and there is pages of empty lines.
When redirecting the oputput to a file it does not include the empty lines.

I tested with a smaller directory and there are less empty lines.

As output redirection does not have a problem this might be related to special terminal characters?

My test system is an Ubuntu 14.04 LTS and I tested with uxterm and gnome-terminal.
I built ripgrep using cargo in release mode. My Rust version is 1.11.0.

[BurntSushi]

Could you provide some input, preferably a single file, where this happens?
A screen shot or dump of the output would be helpful.

On Sep 26, 2016 2:52 AM, "dersebi" notifications@github.com wrote:

Using ripgrep on a Linux terminal prints loads of empty lines. I tried
searching a big directory for a word without any additional options and
there is pages of empty lines.
When redirecting the oputput to a file it does not include the empty lines.

I tested with a smaller directory and there are less empty lines.

As output redirection does not have a problem this might be related to
special terminal characters?

My test system is an Ubuntu 14.04 LTS and I tested with uxterm and
gnome-terminal.
I built ripgrep using cargo in release mode. My Rust version is 1.11.0.

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[dersebi]

A simple test case would be the following:

me@ubuntu:~ $ mkdir test
me@ubuntu:~ $ cd test
me@ubuntu:~/test $ echo "Hello World">test1
me@ubuntu:~/test $ rg World
test1
1:Hello World
me@ubuntu:~/test $ touch test2
me@ubuntu:~/test $ rg World
test1
1:Hello World

me@ubuntu:~/test $
me@ubuntu:~/test $ touch test3
me@ubuntu:~/test $ rg World
test1
1:Hello World


me@ubuntu:~/test $

I haven't verified this, but is seems to add an empty line for each file without a match.

[BurntSushi]

Weird, I can't reproduce:

[andrew@Serval 99] l
total 0
[andrew@Serval 99] echo "Hello World" > test1
[andrew@Serval 99] rg World
test1
1:Hello World
[andrew@Serval 99] touch test2
[andrew@Serval 99] rg World
test1
1:Hello World
[andrew@Serval 99] touch test3
[andrew@Serval 99] rg World
test1
1:Hello World

Could you try your test case again with --color=never? Also, what is the output of echo $TERM?

[dersebi]

--color=never yields the same result with the empty lines, except that it is not colored (obviously)
TERM is set to xterm

[BurntSushi]

Hmm, I'm not sure what's causing this and I can't reproduce it. :-/

Probably my next step is firing up an Ubuntu 14.04 VM, and it may take me a while to get to that.

[nextlogic-ono]

I can reproduce this on Ubuntu 16.04 64bit (single core) on bash with 0.2.0

$ echo yes >a.txt
$ echo no >b.txt
$ touch c.txt
$ rg yes
a.txt
1:yes
(blank line here)
(blank line here)

But I can't reproduce this on CentOS 6.8 (4 cores).

[BurntSushi]

@Windware AH! Dammit. This is another single threaded bug. I really wish I could DRY that up. Thank you so much for looking into this because you just saved me a bunch of time!

(P.S. Try running rg -j1 ... on Centos and it should repro.)

[nextlogic-ono]

-j1 did it on CentOS but it only produced a single blank line with my above example.
-j2 also made a single blank line but -j3 and -j4 removed it.

[BurntSushi]

OK, this should be fixed. This was a regression I introduced last night. :-(

[dersebi]

Fixed indeed. Much better, thanks!