what was the value of the cluster id which caused the problem

builtin/providers/aws/validators.go

@@ -36,23 +36,23 @@ func validateElastiCacheClusterId(v interface{}, k string) (ws []string, errors
 	value := v.(string)
 	if (len(value) < 1) || (len(value) > 20) {
 		errors = append(errors, fmt.Errorf(
-			"%q must contain from 1 to 20 alphanumeric characters or hyphens", k))
+			"%q (%q) must contain from 1 to 20 alphanumeric characters or hyphens", k, value))
 	}
 	if !regexp.MustCompile(`^[0-9a-z-]+$`).MatchString(value) {
 		errors = append(errors, fmt.Errorf(
-			"only lowercase alphanumeric characters and hyphens allowed in %q", k))
+			"only lowercase alphanumeric characters and hyphens allowed in %q (%q)", k, value))
 	}
 	if !regexp.MustCompile(`^[a-z]`).MatchString(value) {
 		errors = append(errors, fmt.Errorf(
-			"first character of %q must be a letter", k))
+			"first character of %q (%q) must be a letter", k, value))
 	}
 	if regexp.MustCompile(`--`).MatchString(value) {
 		errors = append(errors, fmt.Errorf(
-			"%q cannot contain two consecutive hyphens", k))
+			"%q (%q) cannot contain two consecutive hyphens", k, value))
 	}
 	if regexp.MustCompile(`-$`).MatchString(value) {
 		errors = append(errors, fmt.Errorf(
-			"%q cannot end with a hyphen", k))
+			"%q (%q) cannot end with a hyphen", k, value))
 	}
 	return
 }