empty post title generates 404 error

[marcopanichi]

How to generate the error:

1) Settings > Permalink > set Article name
2) new post
3) leave the title empty > write something in the body
4) Publish (a numeric permalink is set because the title is empty)
5) fill in the title > set a category X > Update
6) go to the website > go to category X
7) click on the post title

Expected:

• I see the article

Real result:

• I see 404 page

Notes:
My category.php code is taken from Twenty Twelve template, so the title is rendered by the_permalink() function:

<a href="<?php the_permalink(); ?>" title="<?php echo esc_attr( sprintf( __( 'Permalink to %s', 'fawola' ), the_title_attribute( 'echo=0' ) ) ); ?>" rel="bookmark"><?php the_title(); ?></a>

[DrewAPicture]

Duplicate of #5305.

There is a known issue with numeric-only permalinks.

[DrewAPicture]

Sorry, I misread.

It's still basically the same issue as #5305 though. The permalink is being saved initially as numeric and you're expecting it to change from numeric to a slug when you add a real title. Are permalinks supposed to change when you update a post's title?

[DrewAPicture]

From ​IRC:

<wraithkenny> I think [the permalink is] only supposed to update if the post is a draft

And so it does.