The Bug_rust of Rust:link.exe failed

Recently, encountered a rust problem, resulting in the program can not compile. The situation is as follows:

After many times to vs2015 download, delete, no solution.
After many times to vs2017 download, delete, no solution.

vs2015 on the Internet to find an enterprise version, no solution.

Later found vs2015 Professional Edition (VS2015.PRO_CHS), personalized installation, all installed. For a few hours, finally OK.

Note that there is an address in the middle that modifies the environment variable, to be aware that otherwise the system blocks the change, causing it to skip, causing the settings to be invalid.

The bug led to one weeks of inability to write rust and was in a gloomy mood.

I hereby mark.