hook_init() needs to document what functions are ok/not ok to call

Yes, this has been discussed before:

http://drupal.org/node/374645#comment-1262479
http://drupal.org/node/405578

I'm confused from reading those other issues. Does this just need to be documented in Drupal 6, or does it also apply to Drupal 7?

I tested this and it's no longer a problem with D7

I wrote a tiny little module to call theme() in hook_init():

hookinitthemebugtest.info:

name = "Hook init theme bug test"
description = "Test if D7 hook_init() still have problem with theme call"
core = 7.x
package = Testing
files[] = hookinitthemebugtest.module

hookinitthemebugtest.module

function hookinitthemebugtest_theme($existing, $type, $theme, $path) {
  return array(
    'xyz' => array(
      'variables' => array('string' => NULL),
      'function' => 'hookinitthemebugtest_xyz',
    ),
  );
}


function hookinitthemebugtest_init() {
	
	
	$x = theme('xyz', t('xxx %here', array('%here' => 'there')));
	drupal_set_message($x,'status');
}



function hookinitthemebugtest_xyz($string) {
	
	return '==========='. $string .'=============';
	
}

OK. Thanks for confirming that theme() is ok to call in hook_init() in Drupal 7, as this note says it should be: http://drupal.org/node/405578#comment-2206974

The original issue also mentions t() and node_load() as other functions not to call in hook_init(). Any ideas on that for Drupal 7?

Looks like this is still a question for Drupal 7 documentation. I don't know the answer... anyone?

If all those are ok in D7, please move this issue back to D6 for doc fixes.