--TEST-- No warnings should be thrown during heredoc scan-ahead --FILE-- --EXPECTF-- Warning: Octal escape sequence overflow \400 is greater than \377 in %s on line %d Warning: Octal escape sequence overflow \400 is greater than \377 in %s on line %d Deprecated: Using ${expr} (variable variables) in strings is deprecated, use {${expr}} instead in %s on line %d Warning: Undefined variable $%0 in %s on line %d