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That letter after B is not rendering on Less Wrong?

by lukeprog
16th Aug 2011
1 min read
27

11

Personal Blog

11

That letter after B is not rendering on Less Wrong?
22drpowell
2The Dao of Bayes
17Morendil
30matt
6khafra
16ArisKatsaris
2Dr_Manhattan
11Paul Crowley
10fubarobfusco
12Clippy
5lukeprog
5moridinamael
4windmil
0ScottMessick
4lukeprog
0ScottMessick
0lukeprog
0ScottMessick
2Peter Wildeford
0Peter Wildeford
2Oscar_Cunningham
9Peter Wildeford
0Trippyamine
3windmil
1Alex_Altair
0Dorikka
0Douglas_Knight
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[-]drpowell14y220

Mea culpa. I hastily pushed that commit as there was a broken article on production that needed a hot fix. Embarrassingly, in my haste I deployed before the tests finished. Should be fixed now.

Reply
[-]The Dao of Bayes14y20

Thank you for getting that fixed and letting us know the status :)

Reply
[-]Morendil14y170

I suspect a regular expression gone wild. (ETA: This commit looks like a likely culprit, but I'm not sure what's going on that might cause that particular behavior.)

ETA2: Heh. Thought so.

bash$ python
Type "help", "copyright", "credits" or "license" for more information.
>>> import re
>>> control_chars = re.compile('[\x00-\x08\x0b\0xc\x0e-\x1f]')
>>> text="This is some HTML with c's in it."
>>> control_chars.sub('',text)
"This is some HTML with 's in it."

ETA3: um, unit tests. Use them. Do yourself a favor. Pushing a bug to production that takes under a minute to locate from static inspection of the code? Embarrassing.

ETA4: ...though, in fairness, I can see how someone test-driving this code could easily have written a test that didn't catch this particular mistake.

Reply
[-]matt14y300

ETA3: um, unit tests. Use them. Do yourself a favor. …

We agree completely. We inherited this code from Reddit, and we've spent multiple days trying to strap a workable unit testing framework onto it. As is often the case when you write the code first, strapping unit testing on later is hard.

We've basically given up on unit tests in this code base, but we'd love to be shown to be idiots on this one. Please take this opportunity to show us up by writing some example unit tests around any of our recent commits.
We have strapped Selenium tests on.

Code contributions are very very welcome.

Reply
[-]khafra14y60

As long as you're fixing regressions, how 'bout the whole "comments no longer showing up in IE7" that Silasbarta made a post on a few weeks ago?

edit: Seems to be fixed, thanks!

Reply
[-]ArisKatsaris14y160

The regular expression is wrong: It has the term "\0xc" in it, when it should have had the term "\x0c"

So, instead of excluding the control character corresponding to ascii "0c", it excluded the letters "x" and "c".

Reply
[-]Dr_Manhattan14y20

This post is brought to you by letter

Reply
[-]Paul Crowley14y110

Smoketoomuch: Yes, I saw your advert in the bolour supplement.
Bounder: The what?
Smoketoomuch: The bolour supplement.
Bounder: The colour supplement.
Smoketoomuch: Yes, I'm sorry, I can't say the letter 'B'.
Bounder: C?
Smoketoomuch: Yes, that's right. It's all due to a trauma I suffered when I was a sboolboy. I was attacked by a bat.
Bounder: A cat?
Smoketoomuch: No, a bat.
Bounder: Oh...can you say the letter 'K'?
Smoketoomuch: Oh, yes. Khaki, kind, kettle, Kipling, kipper, Kuwait, Keble Bollege Oxford.
Bounder: Yes, yes but why don't you use the letter 'K' instead of the letter 'C'?
Smoketoomuch: What, spell bolour with a 'K'?
Bounder: Yes!
Smoketoomuch: Kolour!
Oh, thank you! I never thought of that. What a silly bunt.

Reply
[-]fubarobfusco14y100

I was afraid all the C's had been taken away to be bent into paperclips ...

Reply
[-]Clippy14y120

That's a confusion of representational levels, but yes, the letter c is important for being able to verbally reference paperclips.

Reply
[-]lukeprog14y50

Luckily, the letter 'c' still shows up when I EDIT my posts, just not when I VIEW them. So the 'c's are still there, they're just not showing.

Reply
[-]moridinamael14y50

Letter after W as well.

Reply
[-]windmil14y40

Also not showing up in some urls, like this.

Reply
[-]ScottMessick14y00

Yes, or here. Wow, this is bizarre.

Reply
[-]lukeprog14y40

Moreover, blockquotes are not shown as indented in posts like this one. Anybody else?

Reply
[-]ScottMessick14y00

Yes, same symptoms. With the letters and the blockquotes.

EDIT: Also, it's not consistent for me even on this page. I can see the 'c' (letter after 'b') in "blockquotes" in your post that I replied to, and in a few other comments, including mine, but not in the original post.

Reply
[-]lukeprog14y00

Yeah. The letter 'c' and 'x' show up in comments but not in post bodies.

Reply
[-]ScottMessick14y00

They aren't showing up in comments on the older posts though (see above links). Perhaps the folks looking at the code now can explain why.

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[-]Peter Wildeford14y20

Same for me. It certainly is a weird issue.

Reply
[-]Peter Wildeford14y00

Weird. My "c" (letter after b) appears for me in my comments, but no one else's does.

Also, "x" (letter before z) seems to be missing too. Xylophones?

Reply
[-]Oscar_Cunningham14y20

"x" (letter before z)

Ahem?

Reply
[-]Peter Wildeford14y90

Alphabets are hard, okay?

Reply
[-]Trippyamine14y00

It seems like the letters "c" and "x" are working, but were purged from the site at some point. Any new posts that contain them seem okay, but pre-purge posts are very much not so.

[This comment is no longer endorsed by its author]Reply
[-]windmil14y30

I don't know, they don't show up in the newest posts for me, but show up in any comments. I'm really curious why this is happening.

Reply
[-]Alex_Altair14y10

This is a cool bug.

Reply
[-]Dorikka14y00

Information: I'm running the latest version of Firefox with NoScript enabled (lesswrong,com and viglink.com allowed) and things are rendering just fine for me.

Reply
[-]Douglas_Knight14y00

Only lower case. I see a bunch of capital C's in those posts.

Reply
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All of a sudden the letter 'c' (the one after 'b', in case it doesn't render) is not showing up in articles on Less Wrong for me, in any browser, except in images. I see a 'c' in the word 'discussion' above, but not in the body text of posts like this one or this one. Is anybody else getting the same issue?