Handle compilation error

buf.yaml

@@ -12,6 +12,7 @@ lint:
     PROTOVALIDATE:
       - proto/tests/example/v1/validations.proto
       - proto/tests/example/v1/filter.proto
+      - proto/tests/example/v1/compile.proto
 breaking:
   use:
     - FILE

builder.go

@@ -139,9 +139,7 @@ func (bldr *builder) buildMessage(
 	}
 
 	for _, step := range steps {
-		if step(desc, msgConstraints, msgEval, cache); msgEval.Err != nil {
-			break
-		}
+		step(desc, msgConstraints, msgEval, cache)
 	}
 }
 
@@ -200,8 +198,7 @@ func (bldr *builder) processFields(
 		fieldConstraints := resolve.FieldConstraints(fdesc)
 		fldEval, err := bldr.buildField(fdesc, fieldConstraints, cache)
 		if err != nil {
-			msgEval.Err = err
-			return
+			fldEval.Err = err
 		}
 		msgEval.AppendNested(fldEval)
 	}

field.go

@@ -46,6 +46,9 @@ type field struct {
 	IgnoreDefault bool
 	// Zero is the default or zero-value for this value's type
 	Zero protoreflect.Value
+	// Err stores if there was a compilation error constructing this evaluator. It is stored
+	// here so that it can be returned as part of validating this specific field.
+	Err error
 }
 
 func (f field) Evaluate(_ protoreflect.Message, val protoreflect.Value, cfg *validationConfig) error {
@@ -57,6 +60,10 @@ func (f field) EvaluateMessage(msg protoreflect.Message, cfg *validationConfig)
 		return nil
 	}
 
+	if f.Err != nil {
+		return f.Err
+	}
+
 	if f.Required && !msg.Has(f.Value.Descriptor) {
 		return &ValidationError{Violations: []*Violation{{
 			Proto: &validate.Violation{
@@ -84,7 +91,7 @@ func (f field) EvaluateMessage(msg protoreflect.Message, cfg *validationConfig)
 }
 
 func (f field) Tautology() bool {
-	return !f.Required && f.Value.Tautology()
+	return !f.Required && f.Value.Tautology() && f.Err == nil
 }
 
 var _ messageEvaluator = field{}