Check for tokens with non-integer ID

Fixes #974.
nikic · Jan 10, 2024 · ff095c3 · ff095c3
1 parent d619c8b
commit ff095c3
Showing 1 changed file with 7 additions and 0 deletions.
diff --git a/lib/PhpParser/compatibility_tokens.php b/lib/PhpParser/compatibility_tokens.php
@@ -26,6 +26,13 @@ function defineCompatibilityTokens(): void {
         foreach ($compatTokens as $token) {
             if (\defined($token)) {
                 $tokenId = \constant($token);
+                if (!\is_int($tokenId)) {
+                    throw new \Error(sprintf(
+                        'Token %s has ID of type %s, should be int. ' .
+                        'You may be using a library with broken token emulation',
+                        $token, \gettype($tokenId)
+                    ));
+                }
                 $clashingToken = $usedTokenIds[$tokenId] ?? null;
                 if ($clashingToken !== null) {
                     throw new \Error(sprintf(