Composer update - RuntimeException

After installing Composer I try to do a composer update which tells me this:

[Symfony\Component\Process\Exception\RuntimeException]
The process has been signaled with signal "11".

I'm running OSX 10.6.8 (old, I know). What causes this error?

composer self-update ran just fine.

How do I increase composer memory limit?

phar <...> Or, you can increase the limit with a command-line argument: php -d memory_limit=-1 composer.

signal 11 is a segmentation fault. I guess there is a problem with your version of php.

can you show us the output of php --version ? and can you upgrade it if it's not the latest version ?

I had The process has been signaled with signal "6". error and I had to run below commands:

$brew upgrade subversion
$brew link --overwrite subversion

and the issue went! :)

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