在我的例子中，我的作曲家版本是1。X是回溯日期的。 版本升级到2后。X它按预期工作。

苹果笔记本电脑: 执行命令sudo nano ~/。bash_profile编辑bash_profile，然后在该文件中添加别名composer="COMPOSER_MEMORY_LIMIT=-1 composer"，然后保存并退出。

希望这样能解决问题;编码快乐!

Here is another way to solve this problem under windows, if you use Wampserver. Indeed at the level of wampserver, there are two php.ini files, that of PHP, which one can find in the location C: \ wamp64 \ bin \ php \ phpx.xx \ php.ini and that of Apache , which can be found at location C: \ wamp64 \ bin \ apache \ apachex.xx \ bin \ php.ini. Both of these files have the memory_limit parameter. So to be sure to solve this problem, it is better to set the memory_limit = -1 parameter in both files at once.

Composer 2.0预览版现已发布:https://github.com/composer/composer/releases 修正了我的问题。你可以用composer self-update来设置预览

编辑:Composer 2与内存调优发布

在我的例子中，我的作曲家版本是1。X是回溯日期的。 版本升级到2后。X它按预期工作。

Fatal error: Allowed memory size of 1610612736 bytes exhausted (tried to allocate 4096 bytes) in phar:///usr/local/bin/composer/src/Composer/DependencyResolver/RuleWatchGraph.php on line 52 Check https://getcomposer.org/doc/articles/troubleshooting.md#memory-limit-errors for more info on how to handle out of memory errors.

Set memory_limit to -1 works for me;) (vim /etc/php/7.2/cli/php.ini)