Some installation tasks (in my case installing local language po files) aren't being run. Only the last set of the batch in install_run_task() is being run.
The problem is caused by overwriting a reference variable in core/includes/install.core.inc in the batches loop, we use the variable $batch twice. This was introduced in #1993452: Fix confusing UX by merging "Translate configuration" into "Finish translations" task →
This is easier to demonstrated with an example of the code, rather than a Drupal test, maybe someone else can write the proper Drupal test. Below is a simple test using just PHP showing how using the same general code causes the problem.
<?php
class Test {
function run() {
$exsiting = $this->getTestResultsExisting();
batch_reset();
$fixed = $this->getTestResultsFixed();
print_r(get_defined_vars());
}
function getTestResultsExisting() {
$batches = [
['value' => 'test1'],
['value' => 'test2'],
];
foreach ($batches as $batch) {
batch_set($batch);
$batch =& batch_get();
$batch['progressive'] = FALSE;
}
$batch =& batch_get();
return $batch;
}
function getTestResultsFixed() {
$batches = [
['value' => 'test1'],
['value' => 'test2'],
];
foreach ($batches as $batch_definition) {
batch_set($batch_definition);
$batch =& batch_get();
$batch['progressive'] = FALSE;
}
$batch =& batch_get();
return $batch;
}
}
$test = new Test;
$test->run();
function &batch_get() {
static $batch = [];
return $batch;
}
function batch_set($batch_definition) {
if ($batch_definition) {
$batch =& batch_get();
$batch_set = $batch_definition + ['sandbox' => []];
$batch['sets'][] = $batch_set;
}
}
function batch_reset() {
$batch =& batch_get();
$batch = [];
}
Closed: cannot reproduce
10.1 ✨
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It's likely this issue predates Contrib.social: some issue and comment data are missing.
Since no additional information has been provided and it's been more than 3 months, I'm marking the issue "Closed (cannot reproduce)". If anyone can provide complete steps to reproduce the issue (starting from "Install Drupal core"), document those steps in the issue summary and set the issue status back to "Active" [or "Needs Work" if it has a patch, etc.].