[wp-trac] [WordPress Trac] #42573: Templates not working properly

[WordPress Trac]

#42573: Templates not working properly
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 Reporter:  precies       |       Owner:
     Type:  defect (bug)  |      Status:  new
 Priority:  high          |   Milestone:  4.9.1
Component:  Themes        |     Version:  4.9
 Severity:  normal        |  Resolution:
 Keywords:  needs-patch   |     Focuses:
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Comment (by maximejobin):

 As a business owner of a maintenance service where we do our best to keep
 things as stable as possible for our clients, two things are really
 surprising to me here:

 1. How could a feature like that be proposed, accepted and introduced into
 core without anyone noticing it? I did not see any information about this
 in the release notes or in the documentation. Did I miss anything? I truly
 hope it was documented somewhere and I missed it.

 2. Some people propose a patch, to add a button in the UI, to consider
 looking for `WP_DEBUG`, ... And then suddenly decisions are made to remove
 this functionality based on no real explanation. I totally agree with
 @ryanduff about the fact that it "seems" to be solving a non-issue. Is it
 really ? As if the most used web software in the world could accept code
 in its core without anybody noticing it and remove it in a heartbeat.

 Can anybody from the core team step up and let us know:
 - Why was this feature introduced ? What problem does it solve? If any...
 - What is the status on their thoughts now that this seems to cause more
 trouble than good?
 - What will be done in the future to make sure we don't break things with
 functionalities like this ?

 I just want to be clear, I'm not trying to point a finger at anyone. I'm
 looking for a long-term solution because it seems unacceptable to me that
 a software like WordPress, used by hundreds of millions of websites, have
 issues like this.

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Ticket URL: <https://core.trac.wordpress.org/ticket/42573#comment:56>
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