每次启动 mailcatcher 时，都会显示“已初始化常量”警告。谁能建议如何解决这个问题？谢谢。下面更新。
/Users/james/.rvm/gems/ruby-2.1.5/extensions/x86_64-darwin-13/2.1.0/bigdecimal-1.2.7/bigdecimal.bundle: warning: already initialized constant BigDecimal::BASE
/Users/james/.rvm/gems/ruby-2.1.5/extensions/x86_64-darwin-13/2.1.0/bigdecimal-1.2.7/bigdecimal.bundle: warning: already initialized constant BigDecimal::EXCEPTION_ALL
/Users/james/.rvm/gems/ruby-2.1.5/extensions/x86_64-darwin-13/2.1.0/bigdecimal-1.2.7/bigdecimal.bundle: warning: already initialized constant BigDecimal::EXCEPTION_NaN
/Users/james/.rvm/gems/ruby-2.1.5/extensions/x86_64-darwin-13/2.1.0/bigdecimal-1.2.7/bigdecimal.bundle: warning: already initialized constant BigDecimal::EXCEPTION_INFINITY
/Users/james/.rvm/gems/ruby-2.1.5/extensions/x86_64-darwin-13/2.1.0/bigdecimal-1.2.7/bigdecimal.bundle: warning: already initialized constant BigDecimal::EXCEPTION_UNDERFLOW
/Users/james/.rvm/gems/ruby-2.1.5/extensions/x86_64-darwin-13/2.1.0/bigdecimal-1.2.7/bigdecimal.bundle: warning: already initialized constant BigDecimal::EXCEPTION_OVERFLOW
/Users/james/.rvm/gems/ruby-2.1.5/extensions/x86_64-darwin-13/2.1.0/bigdecimal-1.2.7/bigdecimal.bundle: warning: already initialized constant BigDecimal::EXCEPTION_ZERODIVIDE
/Users/james/.rvm/gems/ruby-2.1.5/extensions/x86_64-darwin-13/2.1.0/bigdecimal-1.2.7/bigdecimal.bundle: warning: already initialized constant BigDecimal::ROUND_MODE
/Users/james/.rvm/gems/ruby-2.1.5/extensions/x86_64-darwin-13/2.1.0/bigdecimal-1.2.7/bigdecimal.bundle: warning: already initialized constant BigDecimal::ROUND_UP
/Users/james/.rvm/gems/ruby-2.1.5/extensions/x86_64-darwin-13/2.1.0/bigdecimal-1.2.7/bigdecimal.bundle: warning: already initialized constant BigDecimal::ROUND_DOWN
/Users/james/.rvm/gems/ruby-2.1.5/extensions/x86_64-darwin-13/2.1.0/bigdecimal-1.2.7/bigdecimal.bundle: warning: already initialized constant BigDecimal::ROUND_HALF_UP
/Users/james/.rvm/gems/ruby-2.1.5/extensions/x86_64-darwin-13/2.1.0/bigdecimal-1.2.7/bigdecimal.bundle: warning: already initialized constant BigDecimal::ROUND_HALF_DOWN
/Users/james/.rvm/gems/ruby-2.1.5/extensions/x86_64-darwin-13/2.1.0/bigdecimal-1.2.7/bigdecimal.bundle: warning: already initialized constant BigDecimal::ROUND_CEILING
/Users/james/.rvm/gems/ruby-2.1.5/extensions/x86_64-darwin-13/2.1.0/bigdecimal-1.2.7/bigdecimal.bundle: warning: already initialized constant BigDecimal::ROUND_FLOOR
/Users/james/.rvm/gems/ruby-2.1.5/extensions/x86_64-darwin-13/2.1.0/bigdecimal-1.2.7/bigdecimal.bundle: warning: already initialized constant BigDecimal::ROUND_HALF_EVEN
/Users/james/.rvm/gems/ruby-2.1.5/extensions/x86_64-darwin-13/2.1.0/bigdecimal-1.2.7/bigdecimal.bundle: warning: already initialized constant BigDecimal::SIGN_NaN
/Users/james/.rvm/gems/ruby-2.1.5/extensions/x86_64-darwin-13/2.1.0/bigdecimal-1.2.7/bigdecimal.bundle: warning: already initialized constant BigDecimal::SIGN_POSITIVE_ZERO
/Users/james/.rvm/gems/ruby-2.1.5/extensions/x86_64-darwin-13/2.1.0/bigdecimal-1.2.7/bigdecimal.bundle: warning: already initialized constant BigDecimal::SIGN_NEGATIVE_ZERO
/Users/james/.rvm/gems/ruby-2.1.5/extensions/x86_64-darwin-13/2.1.0/bigdecimal-1.2.7/bigdecimal.bundle: warning: already initialized constant BigDecimal::SIGN_POSITIVE_FINITE
/Users/james/.rvm/gems/ruby-2.1.5/extensions/x86_64-darwin-13/2.1.0/bigdecimal-1.2.7/bigdecimal.bundle: warning: already initialized constant BigDecimal::SIGN_NEGATIVE_FINITE
/Users/james/.rvm/gems/ruby-2.1.5/extensions/x86_64-darwin-13/2.1.0/bigdecimal-1.2.7/bigdecimal.bundle: warning: already initialized constant BigDecimal::SIGN_POSITIVE_INFINITE
/Users/james/.rvm/gems/ruby-2.1.5/extensions/x86_64-darwin-13/2.1.0/bigdecimal-1.2.7/bigdecimal.bundle: warning: already initialized constant BigDecimal::SIGN_NEGATIVE_INFINITE
/Users/james/.rvm/gems/ruby-2.1.5/extensions/x86_64-darwin-13/2.1.0/bigdecimal-1.2.7/bigdecimal.bundle: warning: already initialized constant BigDecimal::INFINITY
/Users/james/.rvm/gems/ruby-2.1.5/extensions/x86_64-darwin-13/2.1.0/bigdecimal-1.2.7/bigdecimal.bundle: warning: already initialized constant BigDecimal::NAN
更新:我有
uninstalled gem bigdecimal 和 installed gem bigdecimal ，没有变化。然后我指定了 gem 'bigdecimal', ~> 1.1 ，仍然没有变化。搜索此错误的内容并不多。我正在运行 Ruby 2.1.5 和 Rails 4.2.1。 最佳答案
可能是 bigdecimal gem 的问题。尝试在您的 Gemfile 中强制使用 v1.1:
gem 'bigdecimal', '~> 1.1'
来自 this answer 。
关于ruby-on-rails - 如何解决 'already initialised constant' cmd 上的 BigDecimal 'mailcatcher' 警告？，我们在Stack Overflow上找到一个类似的问题：https://stackoverflow.com/questions/30470753/