The message you get is an error message. However, this message does not seem to make much sense to me.
The output shows an issue with package
spf13/pflag. The message indicates that the source file “hello.go” is malformed.
The interesting part here is that the
pflag package contains no file named “hello.go” at all.
The path in this message points to a local file:
go\pkg\mod\ is the standard place where downloaded packages are cached.
You might try cleaning the module cache:
go clean -modcache
This removes all local files that were created from downloading and compiling third-party modules. (No worries, the cache will build up again with every
go mod tidy,
go mod download,
go get or similar commands.)
The idea here is that if some file in the cache is damaged, then re-downloading might fix the problem.
After cleaning the module cache, try installing dlv again:
go install github.com/go-delve/delve/cmd/dlv@latest
If this succeeds, then retry “Go: install/update tools” in VSCode.