[wp-trac] [WordPress Trac] #64155: Add stack trace to failed plugin update error notifications

[WordPress Trac]

#64155: Add stack trace to failed plugin update error notifications
-------------------------------------+-------------------------------------
 Reporter:  tlloancy                 |       Owner:  (none)
     Type:  enhancement              |      Status:  new
 Priority:  normal                   |   Milestone:  Awaiting Review
Component:  Upgrade/Install          |     Version:  6.8.3
 Severity:  normal                   |  Resolution:
 Keywords:  needs-testing needs-     |     Focuses:  administration, php-
  patch                              |  compatibility
-------------------------------------+-------------------------------------

Comment (by tlloancy):

 @afragen

 **Additional evidence uploaded** — **3 screenshots** attached to this
 ticket to **fully support the silent failure claim**:

 [[Image(https://ibb.co/8LZJvrHH)]]
 [[Image(https://ibb.co/vxnqTkLW)]]
 [[Image(https://ibb.co/kdjmHg3)]]

 ---

 ### Attached Screenshots:

 1. **screenshot-1-email-failure-1.png**
    → WP Mail Logging: **Email #1** (2025-10-21 15:08:13)
    → Subject: `Certaines mises à jour d’extensions ont échoué`
    → Body clearly lists: **"Newsletter"**

 2. **screenshot-2-email-failure-2.png**
    → WP Mail Logging: **Email #2** (2025-10-22 03:19:37)
    → **Same subject, same plugin: Newsletter**
    → **No error details, no stack trace**

 3. **screenshot-3-plugin-updated-manually.png**
    → WordPress admin → Plugins page
    → **Newsletter** now at **Version 9.0.6**
    → Status: `Mis à jour !`
    → **Only after manual update** — **auto-updates failed twice**

 ---

 **All with:**
 ```php
 define( 'WP_DEBUG', true );
 define( 'WP_DEBUG_LOG', true );

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Ticket URL: <https://core.trac.wordpress.org/ticket/64155#comment:8>
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