feat: skip soft errors.

pkg/golinters/goanalysis/runner_loadingpackage.go

@@ -390,6 +390,7 @@ func (lp *loadingPackage) decUse(canClearTypes bool) {
 
 func (lp *loadingPackage) convertError(err error) []packages.Error {
 	var errs []packages.Error
+
 	// taken from go/packages
 	switch err := err.(type) {
 	case packages.Error:
@@ -416,6 +417,12 @@ func (lp *loadingPackage) convertError(err error) []packages.Error {
 
 	case types.Error:
 		// from type checker
+		if err.Soft {
+			// The meaning of soft is explained in types.Error godoc.
+			// We skip this kind of error because they are handle by the other linters.
+			return nil
+		}
+
 		errs = append(errs, packages.Error{
 			Pos:  err.Fset.Position(err.Pos).String(),
 			Msg:  err.Msg,
@@ -433,6 +440,7 @@ func (lp *loadingPackage) convertError(err error) []packages.Error {
 		// If you see this error message, please file a bug.
 		lp.log.Warnf("Internal error: error %q (%T) without position", err, err)
 	}
+
 	return errs
 }