[wp-trac] [WordPress Trac] #54596: Block theme with period in name causes blank editor

[WordPress Trac]

#54596: Block theme with period in name causes blank editor
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 Reporter:  mkaz                                 |       Owner:
                                                 |  hellofromTonya
     Type:  defect (bug)                         |      Status:  accepted
 Priority:  normal                               |   Milestone:  5.9
Component:  REST API                             |     Version:  trunk
 Severity:  normal                               |  Resolution:
 Keywords:  has-patch has-testing-info has-      |     Focuses:
  unit-tests                                     |
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Comment (by peterwilsoncc):

 This looks to be a wider problem with other characters that are permitted
 in folder names but do not currently work. I've put some notes below.

 Somewhat challenging is that not all characters allowed in a folder name
 are permitted in a post name, so global styles set up with the theme `my-
 theme` and `my.theme` may both end up with the same slug.

 ----

 Manual testing with various characters in the folder name ''with this
 patch applied'' follows.

 For the 2022 clone, success or failure is indicated by whether the editor
 works.

 For the 2020 clone, success or failure is indicated by whether the
 customizer works.

 ||=Character=||=2022 clone=||=2020 clone=||
 || space || Failed || Successful ||
 || `.` || Successful || Successful ||
 || `[` || Failed || Failed ||
 || `|` || Failed || Successful ||
 || `=` || Failed || Successful ||
 || `(` || Failed || Successful ||
 || `+` || Failed || Successful ||
 || `@` || Failed || Successful ||

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Ticket URL: <https://core.trac.wordpress.org/ticket/54596#comment:6>
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