Please don't paste screenshots, and give a short self-contained program that reproduces this issue.

Assuming you mean the HTTP_PROXY environment variable, why would its value even contain a \r character?

Characters that are allowed in a URI but do not have a reserved
purpose are called unreserved. These include uppercase and lowercase
letters, decimal digits, hyphen, period, underscore, and tilde.

How did \r\n get into your environment variable? Seems like that's the bigger problem.

In any case, this is fixed in Go 1.12 (in that we return a more explicit error earlier) and backported on the Go 1.11 and Go 1.10 branches, though we haven't cut new releases of those yet.

Closing as nothing to do, unless we hear otherwise.

I use the rapidee to manage my windows env.I copy that env setting from other.In rapidee, can't see any different！
I known the URI contains \r\n is invalid.But for robustness, program should not trust any user input .

The HTTP_PROXY environment variable should be used as-is. If you're getting newlines in there, you'll have problems with lots of software. You should file a bug with the software that added the newlines.