Add log message

engine/grammar/condition.go

@@ -25,6 +25,7 @@ func NewCondition(cond *dtos.ConditionDTO, ctx *injection.Context, logger loggin
 	}
 	matcherObjs, err := processMatchers(cond.MatcherGroup.Matchers, ctx, logger)
 	if err != nil {
+		//  At this point the only error forwarded is UnsupportedMatcherError
 		return nil, err
 	}
 
@@ -44,6 +45,7 @@ func processMatchers(condMatchers []dtos.MatcherDTO, ctx *injection.Context, log
 		if err == nil {
 			matcherObjs = append(matcherObjs, m)
 		} else {
+			logger.Debug("error in BuildMaycher, reason: ", err.Error())
 			if _, ok := err.(datatypes.UnsupportedMatcherError); ok {
 				return nil, err
 			}

engine/grammar/condition_test.go

@@ -5,6 +5,7 @@ import (
 
 	"github.com/splitio/go-split-commons/v5/dtos"
 	"github.com/splitio/go-split-commons/v5/engine/grammar/matchers"
+	"github.com/splitio/go-split-commons/v5/engine/grammar/matchers/datatypes"
 
 	"github.com/splitio/go-toolkit/v5/logging"
 )
@@ -193,6 +194,10 @@ func TestConditionUnsupportedMatcherWrapperObject(t *testing.T) {
 	if err == nil {
 		t.Error("err should not be nil")
 	}
+
+	if _, ok := err.(datatypes.UnsupportedMatcherError); !ok {
+		t.Error("err should be UnsupportedMatcherError")
+	}
 }
 
 func TestConditionMatcherWithNilStringWrapperObject(t *testing.T) {

engine/grammar/split.go

@@ -37,6 +37,7 @@ func processConditions(splitDTO *dtos.SplitDTO, ctx *injection.Context, logger l
 	for _, cond := range splitDTO.Conditions {
 		condition, err := NewCondition(&cond, ctx, logger)
 		if err != nil {
+			logger.Debug("Overriding conditions due unexpected matcher received")
 			return conditionReplacementUnsupportedMatcher
 		}
 		conditionsToReturn = append(conditionsToReturn, condition)