Bug #78903 [Opn->Fbk]: "Allowed memory size" and "bus error" crashes in 7.4 that do not appear in 7.3

From: Date: Tue, 03 Dec 2019 21:38:41 +0000
Subject: Bug #78903 [Opn->Fbk]: "Allowed memory size" and "bus error" crashes in 7.4 that do not appear in 7.3
References: 1  Groups: php.bugs 
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Edit report at https://bugs.php.net/bug.php?id=78903&edit=1

 ID:                 78903
 Updated by:         derick@php.net
 Reported by:        chartjes at grumpy-learning dot com
 Summary:            "Allowed memory size" and "bus error" crashes in 7.4
                     that do not appear in 7.3
-Status:             Open
+Status:             Feedback
 Type:               Bug
 Package:            Reproducible crash
 Operating System:   macOS 10.15.1
 PHP Version:        7.4.0
 Block user comment: N
 Private report:     N

 New Comment:

It'd be really helpful if you explained how to run the test suite in there. I also thought you
mentioned memory_limit=-1 and a bus error? The latter comes with segfault usually, which you can
make with gdb: https://bugs.php.net/bugs-generating-backtrace.php

You can run that as:
gdb --args php which phpunit

And then "run" on the gdb prompt


Previous Comments:
------------------------------------------------------------------------
[2019-12-03 20:50:55] chartjes at grumpy-learning dot com

Description:
------------
I have been testing out PHP 7.4 with OpenCFP (https://github.com/opencfp/opencfp) and my test suite
that uses PHPUnit is crashing with "Allowed memory size" errors that do not occur when
using PHP 7.3.

I am using PHP 7.4.0 installed using Homebrew

Here are the modules that are installed

[PHP Modules]
bcmath
bz2
calendar
Core
ctype
curl
date
dba
dom
exif
FFI
fileinfo
filter
ftp
gd
gettext
gmp
hash
iconv
intl
json
ldap
libxml
mbstring
mysqli
mysqlnd
odbc
openssl
pcntl
pcre
PDO
pdo_dblib
pdo_mysql
PDO_ODBC
pdo_pgsql
pdo_sqlite
pgsql
Phar
phpdbg_webhelper
posix
pspell
readline
Reflection
session
shmop
SimpleXML
soap
sockets
sodium
SPL
sqlite3
standard
sysvmsg
sysvsem
sysvshm
tidy
tokenizer
xml
xmlreader
xmlrpc
xmlwriter
xsl
Zend OPcache
zip
zlib

[Zend Modules]
Zend OPcache

My default memory_limit setting is 768M

I get the following error:

PHP Fatal error:  Allowed memory size of 805306368 bytes exhausted (tried to allocate 20480 bytes)

If I change memory_limit to be 1024M I get "bus error" when running the tests



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