Parameter #3 of function sprintf is expected to be string by placeholder #2 ("%s"), string|false given.

Author: staabm

src/Rules/Cast/InvalidCastRule.php

@@ -9,6 +9,7 @@
 use PHPStan\Rules\Rule;
 use PHPStan\Rules\RuleErrorBuilder;
 use PHPStan\Rules\RuleLevelHelper;
+use PHPStan\ShouldNotHappenException;
 use PHPStan\Type\ErrorType;
 use PHPStan\Type\Type;
 use PHPStan\Type\VerbosityLevel;
@@ -82,6 +83,10 @@ static function (Type $type) use ($castTypeCallback): bool {
 		if ($castType instanceof ErrorType) {
 			$classReflection = $this->reflectionProvider->getClass(get_class($node));
 			$shortName = $classReflection->getNativeReflection()->getShortName();
+			if ($shortName === '') {
+				throw new ShouldNotHappenException();
+			}
+
 			$shortName = strtolower($shortName);
 			if ($shortName === 'double') {
 				$shortName = 'float';