review changes:

* changed errors formatting with less details
* regenerated mocks

mockgen/import_mode.go

@@ -80,7 +80,7 @@ func (p *importModeParser) extractInterfacesFromPackage(pkg *packages.Package, i
 
 		modelIface, err := p.parseInterface(obj)
 		if err != nil {
-			return nil, newParseTypeError("parse interface", obj.String(), err)
+			return nil, newParseTypeError("parse interface", obj.Name(), err)
 		}
 
 		interfaces[i] = modelIface
@@ -92,12 +92,12 @@ func (p *importModeParser) extractInterfacesFromPackage(pkg *packages.Package, i
 func (p *importModeParser) parseInterface(obj types.Object) (*model.Interface, error) {
 	named, ok := types.Unalias(obj.Type()).(*types.Named)
 	if !ok {
-		return nil, fmt.Errorf("%s is not an interface. it is a %s", obj.Name(), obj.Type().Underlying().String())
+		return nil, fmt.Errorf("%s is not an interface. it is a %T", obj.Name(), obj.Type().Underlying())
 	}
 
 	iface, ok := named.Underlying().(*types.Interface)
 	if !ok {
-		return nil, fmt.Errorf("%s is not an interface. it is a %s", obj.Name(), obj.Type().Underlying().String())
+		return nil, fmt.Errorf("%s is not an interface. it is a %T", obj.Name(), obj.Type().Underlying())
 	}
 
 	if p.isConstraint(iface) {

mockgen/import_mode_test.go

@@ -41,8 +41,8 @@ func Test_importModeParser_parsePackage(t *testing.T) {
 				ifaces:      []string{"Work"},
 			},
 			expectedErr: "extract interfaces from package: parse interface: " +
-				"error parsing type go.uber.org/mock/mockgen/internal/tests/import_mode.Work struct{Name string}: " +
-				"Work is not an interface. it is a struct{Name string}",
+				"error parsing Work: " +
+				"Work is not an interface. it is a *types.Struct",
 		},
 		{
 			name: "error: search for constraint instead of interface",
@@ -51,7 +51,7 @@ func Test_importModeParser_parsePackage(t *testing.T) {
 				ifaces:      []string{"Counter"},
 			},
 			expectedErr: "extract interfaces from package: parse interface: " +
-				"error parsing type go.uber.org/mock/mockgen/internal/tests/import_mode.Counter interface{int}: " +
+				"error parsing Counter: " +
 				"interface Counter is a constraint",
 		},
 		{