我有一个失败的语句：
result = service.load_data()
现在，以下内容抑制了错误，然后我可以检查nil
result = service.load_data() rescue nil
但是，当我执行以下操作时，初始错误会直接抛出到UI，并且我没有得到异常的details。
begin
result = service.load_data()
rescue => details
logger.fatal "Failed to load the data: #{details}"
end
我确信我一定遗漏了一个愚蠢的细节，但我似乎找不到这里的问题。那么为什么不调用rescue块呢？
更新：我得到的错误是：
getaddrinfo: nodename nor servname provided, or not known
begin
result = service.load_data()
rescue AnExceptionKlass => details # here the name is SocketError
logger.fatal "Failed to load the data: #{details}"
end
使用以上内容。
尝试在此处复制错误，如下所示：
require 'net/http'
Net::HTTP.start('http://www.google.com') do |http|
response = http.get('/')
puts response
end
#=> getaddrinfo: No such host is known. (SocketError)
修复如下：
require 'net/http'
begin
htt = Net::HTTP.start('http://www.google.com')
response = htt.get('/')
puts response
rescue SocketError => details # or the Exception class name may be SocketError
p "Failed to load the data: #{details}"
end
#=> "Failed to load the data: getaddrinfo: No such host is known. "