From 0364cb5e31c19b03b5000b346f3c73b987e889d5 Mon Sep 17 00:00:00 2001
From: Jordi Boggiano <j.boggiano@seld.be>
Date: Fri, 12 Jul 2024 10:12:51 +0200
Subject: [PATCH] Add hint as to what might be wrong when invalid identifiers
 are used

---
 src/Rules/RuleErrorBuilder.php | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/src/Rules/RuleErrorBuilder.php b/src/Rules/RuleErrorBuilder.php
index 9a99e89636..a838200800 100644
--- a/src/Rules/RuleErrorBuilder.php
+++ b/src/Rules/RuleErrorBuilder.php
@@ -221,7 +221,7 @@ public function treatPhpDocTypesAsCertainTip(): self
 	public function identifier(string $identifier): self
 	{
 		if (!Error::validateIdentifier($identifier)) {
-			throw new ShouldNotHappenException(sprintf('Invalid identifier: %s', $identifier));
+			throw new ShouldNotHappenException(sprintf('Invalid identifier: %s, error identifiers must match /%s/', $identifier, Error::PATTERN_IDENTIFIER));
 		}
 
 		$this->properties['identifier'] = $identifier;