workaround crash

Author: jirfag

stylecheck/lint.go

@@ -252,6 +252,9 @@ func (c *Checker) CheckUnexportedReturn(j *lint.Job) {
 
 func (c *Checker) CheckReceiverNames(j *lint.Job) {
 	for _, pkg := range j.Program.InitialPackages {
+		if pkg.SSA == nil {
+			continue
+		}
 		for _, m := range pkg.SSA.Members {
 			if T, ok := m.Object().(*types.TypeName); ok && !T.IsAlias() {
 				ms := typeutil.IntuitiveMethodSet(T.Type(), nil)
@@ -276,6 +279,10 @@ func (c *Checker) CheckReceiverNames(j *lint.Job) {
 
 func (c *Checker) CheckReceiverNamesIdentical(j *lint.Job) {
 	for _, pkg := range j.Program.InitialPackages {
+		if pkg.SSA == nil {
+			continue
+		}
+
 		for _, m := range pkg.SSA.Members {
 			names := map[string]int{}