zlib_decode(): data error #4121
Description
I realise this issue has been raised before (#3006, #3270) but no replies were given there and the results are many months old. Since a while, I'm getting the error mentioned in the issue title, when doing a composer require xxx/yyy or composer install
Stack trace from the "very verbose" mode is as follows:
[ErrorException]
zlib_decode(): data error
Exception trace:
() at phar://C:/ProgramData/ComposerSetup/bin/composer.phar/src/Composer/Util/RemoteFilesystem.php:218
Composer\Util\ErrorHandler::handle() at n/a:n/a
zlib_decode() at phar://C:/ProgramData/ComposerSetup/bin/composer.phar/src/Composer/Util/RemoteFilesystem.php:218
Composer\Util\RemoteFilesystem->get() at phar://C:/ProgramData/ComposerSetup/bin/composer.phar/src/Composer/Util/Remote
Filesystem.php:83
Composer\Util\RemoteFilesystem->getContents() at phar://C:/ProgramData/ComposerSetup/bin/composer.phar/src/Composer/Rep
ository/ComposerRepository.php:587
Composer\Repository\ComposerRepository->fetchFile() at phar://C:/ProgramData/ComposerSetup/bin/composer.phar/src/Compos
er/Repository/ComposerRepository.php:296
Composer\Repository\ComposerRepository->whatProvides() at phar://C:/ProgramData/ComposerSetup/bin/composer.phar/src/Com
poser/DependencyResolver/Pool.php:191
Composer\DependencyResolver\Pool->computeWhatProvides() at phar://C:/ProgramData/ComposerSetup/bin/composer.phar/src/Co
mposer/DependencyResolver/Pool.php:180
Composer\DependencyResolver\Pool->whatProvides() at phar://C:/ProgramData/ComposerSetup/bin/composer.phar/src/Composer/
DependencyResolver/RuleSetGenerator.php:221
Composer\DependencyResolver\RuleSetGenerator->addRulesForPackage() at phar://C:/ProgramData/ComposerSetup/bin/composer.
phar/src/Composer/DependencyResolver/RuleSetGenerator.php:293
Composer\DependencyResolver\RuleSetGenerator->addRulesForJobs() at phar://C:/ProgramData/ComposerSetup/bin/composer.pha
r/src/Composer/DependencyResolver/RuleSetGenerator.php:333
Composer\DependencyResolver\RuleSetGenerator->getRulesFor() at phar://C:/ProgramData/ComposerSetup/bin/composer.phar/sr
c/Composer/DependencyResolver/Solver.php:172
Composer\DependencyResolver\Solver->solve() at phar://C:/ProgramData/ComposerSetup/bin/composer.phar/src/Composer/Insta
ller.php:505
Composer\Installer->doInstall() at phar://C:/ProgramData/ComposerSetup/bin/composer.phar/src/Composer/Installer.php:230
Composer\Installer->run() at phar://C:/ProgramData/ComposerSetup/bin/composer.phar/src/Composer/Command/RequireCommand.
php:158
Composer\Command\RequireCommand->execute() at phar://C:/ProgramData/ComposerSetup/bin/composer.phar/vendor/symfony/cons
ole/Symfony/Component/Console/Command/Command.php:257
Symfony\Component\Console\Command\Command->run() at phar://C:/ProgramData/ComposerSetup/bin/composer.phar/vendor/symfon
y/console/Symfony/Component/Console/Application.php:874
Symfony\Component\Console\Application->doRunCommand() at phar://C:/ProgramData/ComposerSetup/bin/composer.phar/vendor/s
ymfony/console/Symfony/Component/Console/Application.php:195
Symfony\Component\Console\Application->doRun() at phar://C:/ProgramData/ComposerSetup/bin/composer.phar/src/Composer/Co
nsole/Application.php:146
Composer\Console\Application->doRun() at phar://C:/ProgramData/ComposerSetup/bin/composer.phar/vendor/symfony/console/S
ymfony/Component/Console/Application.php:126
Symfony\Component\Console\Application->run() at phar://C:/ProgramData/ComposerSetup/bin/composer.phar/src/Composer/Cons
ole/Application.php:82
Composer\Console\Application->run() at phar://C:/ProgramData/ComposerSetup/bin/composer.phar/bin/composer:43
require() at C:\ProgramData\ComposerSetup\bin\composer.phar:25
Any thoughts on why this happens and/or how to fix it?
I'm only getting this on one of my systems, and it worked fine in the past, I'm not sure what changed since. I have reinstalled Composer just now, so I'm using the latest version. Specs of my system: Windows 8.1 x64, PHP 5.6.5 x64
Edit: when I require a new dependency on an other machine, then run composer install on my own system, that works just fine.
Edit 2: I just noticed Composer is connecting to http://packagist.org, despite having openssl enabled.