Testing instructions:
To reproduce:

1. Create a new role "author" with archetype "student" available on course context
2. Set moodle/course:manageactivities to "Permit" for this role
3. Set mod/subsection:addinstance to "Permit" for this role
4. Verify that the "author" role does NOT have the capability moodle/course:update
5. Create a new user with username "authoruser"
6. Enrol the user "authoruser" into a course
7. Assign the role "author" role to the user "authoruser"
8. As admin enable the mod_subsection activity plugin
9. As "authoruser" go to the course, enable edit mode and add a subsection
10. Confirm that the subsection has been created without an error being shown

Code verified against automated checks.

Checked MDL-85020 using repository: https://github.com/phmemmel/moodle.git

• MOODLE_405_STABLE (0 errors / 0 warnings) [branch: MDL-85020-MOODLE_405_STABLE | CI Job]
• main (0 errors / 0 warnings) [branch: MDL-85020-main | CI Job]

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Built on: Wed Mar 26 12:59:34 UTC 2025