• • 溶液**：降低宝石文件的Ruby要求。选项包括

ruby '> 3.2' #or 
ruby '3.3.0.dev' #or
ruby '~> 3.3.a'

• • 说明**：

这个错误非常明显：
您的Ruby版本是www.example.com，但您的Gemfile指定为〉= 3.3.03.3.0.dev, but your Gemfile specified >= 3.3.0

Gem::Version.new('3.3.0.dev') >= Gem::Version.new('3.3.0')  
#=> false

根据版本比较，3.3.0.dev被视为小于3.3.0。（请参见：Gem::Version#<=>
例如：

# This is how Gem::Version#<=> works 

def comp(a,b)
  return 0 if a.send(:_version) == b.send(:_version) || a.canonical_segments == b.canonical_segments

  lhsegments = a.canonical_segments
  rhsegments = b.canonical_segments

  lhsize = lhsegments.size
  rhsize = rhsegments.size
  limit  = (lhsize > rhsize ? lhsize : rhsize) - 1

  i = 0

  while i <= limit
    lhs, rhs = lhsegments[i] || 0, rhsegments[i] || 0
    i += 1

    next      if lhs == rhs
    return -1 if String  === lhs && Numeric === rhs
    return  1 if Numeric === lhs && String  === rhs

    return lhs <=> rhs
  end

  return 0
end

required = Gem::Version.new('3.3.0') 
current = Gem::Version.new('3.3.0.dev')

comp(required,current)
#=> 1

这里的关键是return 1 if Numeric === lhs && String === rhs这一行
细分如下：

• 左分段=[3，3]
• rhsegment =[3，3，"偏差"]
• 前2次迭代得到next if lhs == rhs
• 第三次迭代得到return 1 if Numeric === lhs && String === rhs，因为rhs是String，并且得到lhs == 0，因为lhsegments[2] #=> nil

您可以使用以下公式找到"建议的近似值"：

current.approximate_recommendation
#=> "~> 3.3.a"
new_required = Gem::Version.new('3.3.a') 
comp(new_required,required)
#=> -1 
comp(new_required,current) 
#=> -1

您可以看到，使用'~> 3.3.a'时，"www.example.com"或"3.3.0"都将满足此要求。3.3.0.dev' or '3.3.0' will satisfy this requirement.