我的应用程序向 PayPal 发送 https 帖子。使用 Gemfile 中指定的 pg gem，post 操作会导致 WEBBrick 崩溃。如果我将 pg gem 从 Gemfile 中取出，则不会发生崩溃，并且我的帖子正常。（花了很长时间才弄清楚这是导致它的原因，但它是 100% 可重复的。）
更有趣的是，如果我将 pg gem 从 Gemfile 中取出但保持安装状态，一切正常。我将它放回 Gemfile 的那一刻，崩溃再次发生。
两个问题，然后：a）有人看过这个吗？b）即使 pg gem 的存在不会导致崩溃，Gemfile 做了什么导致崩溃？
发布帖子的代码如下所示（直接来自 PayPal SDK）：
# 默认支付
路径 = "/nvp/"
数据=“....”
服务器 =“api-3t.sandbox.paypal.com”
端口 = 443
header = {"Content-Type" => "html/text"}
http = Net::HTTP.new（服务器，端口）
http.use_ssl = 真
http.verify_mode = OpenSSL::SSL::VERIFY_NONE
resp = http.post2（路径、数据、标题）
@code = resp.code
结尾
这是发生崩溃时的输出：
-- Ruby 级别的回溯信息 ---------------------------------------- /Users/aehven/.rvm/rubies/ruby-1.9.2-p180/lib/ruby/1.9.1/webrick/server.rb:183:in `block in start_thread' /Users/aehven/.rvm/rubies/ruby-1.9.2-p180/lib/ruby/1.9.1/webrick/httpserver.rb:70:在“运行”中 /Users/aehven/.rvm/rubies/ruby-1.9.2-p180/lib/ruby/1.9.1/webrick/httpserver.rb:111:in `服务' /Users/aehven/.rvm/gems/ruby-1.9.2-p180@littlenik/gems/rack-1.2.1/lib/rack/handler/webrick.rb:52:in `服务' /Users/aehven/.rvm/gems/ruby-1.9.2-p180@littlenik/gems/rack-1.2.1/lib/rack/content_length.rb:13:in `call' /Users/aehven/.rvm/gems/ruby-1.9.2-p180@littlenik/gems/railties-3.0.3/lib/rails/rack/log_tailer.rb:14:in `call' /Users/aehven/.rvm/gems/ruby-1.9.2-p180@littlenik/gems/railties-3.0.3/lib/rails/application.rb:77:in `method_missing' /Users/aehven/.rvm/gems/ruby-1.9.2-p180@littlenik/gems/railties-3.0.3/lib/rails/application.rb:168:in `call' /Users/aehven/.rvm/gems/ruby-1.9.2-p180@littlenik/gems/actionpack-3.0.3/lib/action_dispatch/middleware/static.rb:30:in `call' /Users/aehven/.rvm/gems/ruby-1.9.2-p180@littlenik/gems/rack-1.2.1/lib/rack/lock.rb:11:in `call' :10:在“同步”中 /Users/aehven/.rvm/gems/ruby-1.9.2-p180@littlenik/gems/rack-1.2.1/lib/rack/lock.rb:11:in `block in call' /Users/aehven/.rvm/gems/ruby-1.9.2-p180@littlenik/gems/activesupport-3.0.3/lib/active_support/cache/strategy/local_cache.rb:72:in `call' /Users/aehven/.rvm/gems/ruby-1.9.2-p180@littlenik/gems/rack-1.2.1/lib/rack/runtime.rb:17:in `call' /Users/aehven/.rvm/gems/ruby-1.9.2-p180@littlenik/gems/railties-3.0.3/lib/rails/rack/logger.rb:13:in `call' /Users/aehven/.rvm/gems/ruby-1.9.2-p180@littlenik/gems/actionpack-3.0.3/lib/action_dispatch/middleware/show_exceptions.rb:46:in `call' /Users/aehven/.rvm/gems/ruby-1.9.2-p180@littlenik/gems/actionpack-3.0.3/lib/action_dispatch/middleware/remote_ip.rb:48:in `call' /Users/aehven/.rvm/gems/ruby-1.9.2-p180@littlenik/gems/rack-1.2.1/lib/rack/sendfile.rb:107:in `call' /Users/aehven/.rvm/gems/ruby-1.9.2-p180@littlenik/gems/actionpack-3.0.3/lib/action_dispatch/middleware/callbacks.rb:44:in `call' /Users/aehven/.rvm/gems/ruby-1.9.2-p180@littlenik/gems/activesupport-3.0.3/lib/active_support/callbacks.rb:415:in `_run_call_callbacks' /Users/aehven/.rvm/gems/ruby-1.9.2-p180@littlenik/gems/actionpack-3.0.3/lib/action_dispatch/middleware/callbacks.rb:46:in `block in call' /Users/aehven/.rvm/gems/ruby-1.9.2-p180@littlenik/gems/activerecord-3.0.3/lib/active_record/connection_adapters/abstract/connection_pool.rb:353:in `call' /Users/aehven/.rvm/gems/ruby-1.9.2-p180@littlenik/gems/activerecord-3.0.3/lib/active_record/query_cache.rb:31:in `call' /Users/aehven/.rvm/gems/ruby-1.9.2-p180@littlenik/gems/activerecord-3.0.3/lib/active_record/query_cache.rb:12:in `cache' /Users/aehven/.rvm/gems/ruby-1.9.2-p180@littlenik/gems/activerecord-3.0.3/lib/active_record/connection_adapters/abstract/query_cache.rb:28:in `cache' /Users/aehven/.rvm/gems/ruby-1.9.2-p180@littlenik/gems/activerecord-3.0.3/lib/active_record/query_cache.rb:32:in `block in call' /Users/aehven/.rvm/gems/ruby-1.9.2-p180@littlenik/gems/actionpack-3.0.3/lib/action_dispatch/middleware/cookies.rb:295:in `call' /Users/aehven/.rvm/gems/ruby-1.9.2-p180@littlenik/gems/actionpack-3.0.3/lib/action_dispatch/middleware/session/abstract_store.rb:149:in `call' /Users/aehven/.rvm/gems/ruby-1.9.2-p180@littlenik/gems/actionpack-3.0.3/lib/action_dispatch/middleware/flash.rb:182:in `call' /Users/aehven/.rvm/gems/ruby-1.9.2-p180@littlenik/gems/actionpack-3.0.3/lib/action_dispatch/middleware/params_parser.rb:21:in `call' /Users/aehven/.rvm/gems/ruby-1.9.2-p180@littlenik/gems/rack-1.2.1/lib/rack/methodoverride.rb:24:in `call' /Users/aehven/.rvm/gems/ruby-1.9.2-p180@littlenik/gems/actionpack-3.0.3/lib/action_dispatch/middleware/head.rb:14:in `call' /Users/aehven/.rvm/gems/ruby-1.9.2-p180@littlenik/gems/actionpack-3.0.3/lib/action_dispatch/middleware/best_standards_support.rb:17:in `call' /Users/aehven/.rvm/gems/ruby-1.9.2-p180@littlenik/gems/actionpack-3.0.3/lib/action_dispatch/routing/route_set.rb:492:in `call' /Users/aehven/.rvm/gems/ruby-1.9.2-p180@littlenik/gems/rack-mount-0.6.13/lib/rack/mount/route_set.rb:139:in `call' /Users/aehven/.rvm/gems/ruby-1.9.2-p180@littlenik/gems/rack-mount-0.6.13/lib/rack/mount/code_generation.rb:92:in `recognize' /Users/aehven/.rvm/gems/ruby-1.9.2-p180@littlenik/gems/rack-mount-0.6.13/lib/rack/mount/code_generation.rb:68:in `optimized_each' /Users/aehven/.rvm/gems/ruby-1.9.2-p180@littlenik/gems/rack-mount-0.6.13/lib/rack/mount/code_generation.rb:93:in `识别中的块' /Users/aehven/.rvm/gems/ruby-1.9.2-p180@littlenik/gems/rack-mount-0.6.13/lib/rack/mount/route_set.rb:148:in `block in call' /Users/aehven/.rvm/gems/ruby-1.9.2-p180@littlenik/gems/actionpack-3.0.3/lib/action_dispatch/routing/route_set.rb:27:in `call' /Users/aehven/.rvm/gems/ruby-1.9.2-p180@littlenik/gems/actionpack-3.0.3/lib/action_dispatch/routing/route_set.rb:62:in `dispatch' /Users/aehven/.rvm/gems/ruby-1.9.2-p180@littlenik/gems/actionpack-3.0.3/lib/action_dispatch/routing/route_set.rb:62:in `call' /Users/aehven/.rvm/gems/ruby-1.9.2-p180@littlenik/gems/actionpack-3.0.3/lib/action_controller/metal.rb:178:in `block in action' /Users/aehven/.rvm/gems/ruby-1.9.2-p180@littlenik/gems/actionpack-3.0.3/lib/action_controller/metal/rack_delegation.rb:14:in `dispatch' /Users/aehven/.rvm/gems/ruby-1.9.2-p180@littlenik/gems/actionpack-3.0.3/lib/action_controller/metal.rb:138:in `dispatch' /Users/aehven/.rvm/gems/ruby-1.9.2-p180@littlenik/gems/actionpack-3.0.3/lib/abstract_controller/rendering.rb:40:in `process' /Users/aehven/.rvm/gems/ruby-1.9.2-p180@littlenik/gems/actionpack-3.0.3/lib/abstract_controller/base.rb:120:in `process' /Users/aehven/.rvm/gems/ruby-1.9.2-p180@littlenik/gems/actionpack-3.0.3/lib/action_controller/metal/rescue.rb:17:in `process_action' /Users/aehven/.rvm/gems/ruby-1.9.2-p180@littlenik/gems/actionpack-3.0.3/lib/action_controller/metal/instrumentation.rb:29:in `process_action' /Users/aehven/.rvm/gems/ruby-1.9.2-p180@littlenik/gems/activesupport-3.0.3/lib/active_support/notifications.rb:52:in `instrument' /Users/aehven/.rvm/gems/ruby-1.9.2-p180@littlenik/gems/activesupport-3.0.3/lib/active_support/notifications/instrument.rb:21:in `instrument' /Users/aehven/.rvm/gems/ruby-1.9.2-p180@littlenik/gems/activesupport-3.0.3/lib/active_support/notifications.rb:52:in `block in instrument' /Users/aehven/.rvm/gems/ruby-1.9.2-p180@littlenik/gems/actionpack-3.0.3/lib/action_controller/metal/instrumentation.rb:30:in `block in process_action' /Users/aehven/.rvm/gems/ruby-1.9.2-p180@littlenik/gems/actionpack-3.0.3/lib/abstract_controller/callbacks.rb:17:in `process_action' /Users/aehven/.rvm/gems/ruby-1.9.2-p180@littlenik/gems/activesupport-3.0.3/lib/active_support/callbacks.rb:93:in `run_callbacks' /Users/aehven/.rvm/gems/ruby-1.9.2-p180@littlenik/gems/activesupport-3.0.3/lib/active_support/callbacks.rb:409:in `_run_process_action_callbacks' /Users/aehven/.rvm/gems/ruby-1.9.2-p180@littlenik/gems/activesupport-3.0.3/lib/active_support/callbacks.rb:435:in `_run__1503509404736522407__process_action__285881469255263509__callbacks' /Users/aehven/.rvm/gems/ruby-1.9.2-p180@littlenik/gems/actionpack-3.0.3/lib/abstract_controller/callbacks.rb:18:in `block in process_action' /Users/aehven/.rvm/gems/ruby-1.9.2-p180@littlenik/gems/actionpack-3.0.3/lib/action_controller/metal/rendering.rb:11:in `process_action' /Users/aehven/.rvm/gems/ruby-1.9.2-p180@littlenik/gems/actionpack-3.0.3/lib/abstract_controller/base.rb:151:in `process_action' /Users/aehven/.rvm/gems/ruby-1.9.2-p180@littlenik/gems/actionpack-3.0.3/lib/action_controller/metal/implicit_render.rb:4:in `send_action' /Users/aehven/Work/Projects/Pico-Tesla/Workspace/trunk/app/controllers/payments_controller.rb:54:in `do_DCC' /Users/aehven/Work/Projects/Pico-Tesla/Workspace/trunk/vendor/plugins/PayPalSDK/lib/caller.rb:70:in `call' /Users/aehven/.rvm/rubies/ruby-1.9.2-p180/lib/ruby/1.9.1/net/http.rb:978:in `post' /Users/aehven/.rvm/gems/ruby-1.9.2-p180@littlenik/gems/rest-client-1.6.1/lib/restclient/net_http_ext.rb:17:in `request' /Users/aehven/.rvm/rubies/ruby-1.9.2-p180/lib/ruby/1.9.1/net/http.rb:1168:in `request' /Users/aehven/.rvm/rubies/ruby-1.9.2-p180/lib/ruby/1.9.1/net/http.rb:626:in `start' /Users/aehven/.rvm/rubies/ruby-1.9.2-p180/lib/ruby/1.9.1/net/http.rb:637:in `do_start' /Users/aehven/.rvm/rubies/ruby-1.9.2-p180/lib/ruby/1.9.1/net/http.rb:678:in `connect' /Users/aehven/.rvm/rubies/ruby-1.9.2-p180/lib/ruby/1.9.1/timeout.rb:87:in `timeout' /Users/aehven/.rvm/rubies/ruby-1.9.2-p180/lib/ruby/1.9.1/timeout.rb:44:in `timeout' /Users/aehven/.rvm/rubies/ruby-1.9.2-p180/lib/ruby/1.9.1/net/http.rb:678:in `block in connect' /Users/aehven/.rvm/rubies/ruby-1.9.2-p180/lib/ruby/1.9.1/net/http.rb:678:in `connect' -