[PHP-BUG] Bug #77539 [NEW]: BC break in heredoc syntax in 7.3

From:             rasc at jfmedier dot dk
Operating system: Windows 10 / WSL
PHP version:      7.3.1
Package:          PHP Language Specification
Bug Type:         Bug
Bug description:BC break in heredoc syntax in 7.3

Description:
------------
PHP 7.3 introduced a minor BC syntax break against 7.2.

Likely this regression was introduced while refactoring to introduce
support for flexible heredoc/nowdoc syntax in 7.3.

You can see a failing build here:

https://travis-ci.org/kodus/mail/jobs/485801377

This build succeeds under 7.1 and 7.2, but fails under 7.3.

You can see the parse error affecting 7.3.0 and 7.3.1 here:

https://3v4l.org/1H0l7

(by the way: looks like the documentation page was never updated to
reflect changed from the flexible heredoc/nowdoc syntax RFC.)


Test script:
---------------
<?php

$mime_header = <<<MIME
Date: Thu, 15 Sep 2016 17:20:54 +0200
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
MIME;


Expected result:
----------------
Should compile.


Actual result:
--------------
Exits with the following error:

> Parse error: syntax error, unexpected ':' in /in/1H0l7 on line 5


-- 
Edit bug report at https://bugs.php.net/bug.php?id=77539&edit=1
-- 
Try a snapshot (PHP 5.4):   https://bugs.php.net/fix.php?id=77539&r=trysnapshot54
Try a snapshot (PHP 5.5):   https://bugs.php.net/fix.php?id=77539&r=trysnapshot55
Try a snapshot (trunk):     https://bugs.php.net/fix.php?id=77539&r=trysnapshottrunk
Fixed in SVN:               https://bugs.php.net/fix.php?id=77539&r=fixed
Fixed in release:           https://bugs.php.net/fix.php?id=77539&r=alreadyfixed
Need backtrace:             https://bugs.php.net/fix.php?id=77539&r=needtrace
Need Reproduce Script:      https://bugs.php.net/fix.php?id=77539&r=needscript
Try newer version:          https://bugs.php.net/fix.php?id=77539&r=oldversion
Not developer issue:        https://bugs.php.net/fix.php?id=77539&r=support
Expected behavior:          https://bugs.php.net/fix.php?id=77539&r=notwrong
Not enough info:            https://bugs.php.net/fix.php?id=77539&r=notenoughinfo
Submitted twice:            https://bugs.php.net/fix.php?id=77539&r=submittedtwice
register_globals:           https://bugs.php.net/fix.php?id=77539&r=globals
PHP 4 support discontinued: https://bugs.php.net/fix.php?id=77539&r=php4
Daylight Savings:           https://bugs.php.net/fix.php?id=77539&r=dst
IIS Stability:              https://bugs.php.net/fix.php?id=77539&r=isapi
Install GNU Sed:            https://bugs.php.net/fix.php?id=77539&r=gnused
Floating point limitations: https://bugs.php.net/fix.php?id=77539&r=float
No Zend Extensions:         https://bugs.php.net/fix.php?id=77539&r=nozend
MySQL Configuration Error:  https://bugs.php.net/fix.php?id=77539&r=mysqlcfg