wp-includes/class-wp-block-processor.php:1368Indicates if the last attempt to parse a block comment delimiter failed, if set, otherwise null if the last attempt succeeded.
string|null public function get_last_error(): ?string { return $this->last_error; }Introduced in 6.9.0. Unchanged from 6.9.7 through 7.1.0.
Signature, return type and hooks compared across 3 parsed releases.
src/wp-includes/class-wp-block-processor.php, and regenerated for each WordPress release so it tracks the code rather than a snapshot of it.