// the problem — so we prefer the latter.
				pkg.err = err
			}

			// err is nil, but we intentionally leave pkg.err non-nil and pkg.mod
			// unset: we still haven't satisfied other invariants of a
			// successfully-loaded package, such as scanning and loading the imports
			// of that package. If we succeed in resolving the new dependency graph,

		t.Fatal("UserHomeDir returned an empty string but no error")
	}
	if err != nil {
		// UserHomeDir may return a non-nil error if the environment variable
		// for the home directory is empty or unset in the environment.
		t.Skipf("skipping: %v", err)
	}

	fi, err := Stat(dir)
	if err != nil {
		if IsNotExist(err) {
			// The user's home directory has a well-defined location, but does not

			return false
		default:
			if seen[a] {
				return false
			}
			seen[a] = true
			return true
		}
	})
}

// clearTemplateArgs gives an error for any unset Template field in
// args.  This handles erroneous cases where a cast operator with a
// forward referenced template is in the scope of another cast
// operator.
func (st *state) clearTemplateArgs(args []AST) {