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-rw-r--r--program/include/rcube_imap_cache.php8
1 files changed, 5 insertions, 3 deletions
diff --git a/program/include/rcube_imap_cache.php b/program/include/rcube_imap_cache.php
index ee4e92542..acff14653 100644
--- a/program/include/rcube_imap_cache.php
+++ b/program/include/rcube_imap_cache.php
@@ -1108,10 +1108,12 @@ class rcube_imap_cache
private function build_thread_data($data, &$depth, &$children, $level = 0)
{
foreach ((array)$data as $key => $val) {
- $children[$key] = !empty($val);
- $depth[$key] = $level;
- if (!empty($val))
+ $empty = empty($val) || !is_array($val);
+ $children[$key] = !$empty;
+ $depth[$key] = $level;
+ if (!$empty) {
$this->build_thread_data($val, $depth, $children, $level + 1);
+ }
}
}