Why Am I Getting the "compile: version 'go1.9' does not match go tool version 'go1.9.1.'" Error?

Error: Version Mismatch Between Go Tool and Compiler

When attempting to run a Go program, you encountered the error message "compile: version 'go1.9' does not match go tool version 'go1.9.1.'" This error often arises due to a difference between the Go version used to build the program (go1.9) and the version of the Go tool (go1.9.1) that is installed on your system.

Root Cause and Solution:

The root cause of this error is that the compiler used to build the program is an older version of Go than the Go tool you are currently running. To resolve the issue, ensure that you have the latest version of Go installed and are using it to compile your programs.

Fixing the Issue:

Depending on your operating system and package manager, the steps involved in updating and using the latest version of Go might vary. Here's a general approach:

1. Update Go:

   • Run the appropriate command to update Go on your operating system (e.g., brew upgrade go on macOS using Homebrew).

2. Check Go Version:

   • Run go version to verify that you have the latest version of Go installed.

3. Configure GOROOT (Optional):

   • If you use OSX Homebrew, you may need to set the $GOROOT environment variable in your Bash or Zsh profile. Add the following line to your profile:
   • export GOROOT=/usr/local/opt/go/libexec

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