Fixed bug #45392 (ob_start()/ob_end_clean() and memory_limit).

Author: Ilia Alshanetsky

NEWS

@@ -19,6 +19,7 @@ PHP                                                                        NEWS
 - Fixed bug #45928 (large scripts from stdin are stripped at 16K border).
   (Christian Schneider, Arnaud)
 - Fixed bug #45911 (Cannot disable ext/hash). (Arnaud)
+- Fixed bug #45392 (ob_start()/ob_end_clean() and memory_limit). (Ilia)
 - Fixed bug #45382 (timeout bug in stream_socket_enable_crypto).
   (vnegrier at optilian dot com, Ilia
 

main/main.c

@@ -1478,7 +1478,12 @@ void php_request_shutdown(void *dummy)
 
 	/* 3. Flush all output buffers */
 	zend_try {
-		php_end_ob_buffers((zend_bool)(SG(request_info).headers_only?0:1) TSRMLS_CC);
+		zend_bool send_buffer = SG(request_info).headers_only ? 0 : 1;
+		if (CG(unclean_shutdown) && PG(last_error_type) == E_ERROR &&
+				!OG(active_ob_buffer).chunk_size && PG(memory_limit) < zend_memory_usage(1 TSRMLS_CC)) {
+			send_buffer = 0;
+		}
+		php_end_ob_buffers(send_buffer TSRMLS_CC);
 	} zend_end_try();
 
 	/* 4. Send the set HTTP headers (note: This must be done AFTER php_end_ob_buffers() !!) */