Bootstrap/Load: Ensure WP_Fatal_Error_Handler does not conflict with existing mechanisms treating fatal errors.

Prior to this change, resuming or activating a plugin or theme that is still broken would result in a redirect loop if in recovery mode. If outside recovery mode, it would cause the error template to be displayed.

Furthermore this applies to breaking a plugin or theme when editing from the backend.

Props aandrewdixon, azaozz, dhanukanuwan, henrywright, ocean90, ohiosierra, PandelisZ, xkon.
Fixes #46045, #46751.


git-svn-id: https://develop.svn.wordpress.org/trunk@45114 602fd350-edb4-49c9-b593-d223f7449a82

src/wp-includes/class-wp-fatal-error-handler.php

@@ -26,6 +26,10 @@ class WP_Fatal_Error_Handler {
 	 * @since 5.2.0
 	 */
 	public function handle() {
+		if ( defined( 'WP_SANDBOX_SCRAPING' ) && WP_SANDBOX_SCRAPING ) {
+			return;
+		}
+
 		try {
 			// Bail if no error found.
 			$error = $this->detect_error();