FrozenError from Redis patcher #initialize

[KJTsanaktsidis]

Current behaviour
When instantiating a Redis client using the current master branch of dd-trace-rb, and passing in a frozen options hash, an exception is raised:

FrozenError: can't modify frozen Hash: {:url=>"redis://localhost:6379", :timeout=>1.0}
    /home/runner/vendor/bundle-52/ruby/2.7.0/bundler/gems/dd-trace-rb-f387e1747a44/lib/datadog/tracing/contrib/redis/patcher.rb:24:in `initialize'

Expected behaviour
It should not raise an exception :) This was broken a few days ago in #2363 I believe

Steps to reproduce

Redis.new({}.freeze) should do it I think?

How does ddtrace help you?

It rocks! Really looking forward to rolling out the new native profiler implementation.

Environment

• **ddtrace version: Git master, ref f387e1747a44 **
• Configuration block doubt this is relevant?:
• Ruby version: 2.7.6
• Operating system: Ubuntu 18.04
• Relevant library versions: N/A

[zenspider]

https://github.com/DataDog/dd-trace-rb/pull/2363/files#r1023420482

[TonyCTHsu]

@KJTsanaktsidis @zenspider Thanks for reporting! Yeah it seems like the current code does not handle a frozen input. Will fix!

[TonyCTHsu]

@KJTsanaktsidis 👋 I just released 1.6.1, this would fix the frozen input. Will be working on redis 5 instrumentation next!