ConstantStringType - catch Error in setOffsetValueType

Author: ondrejmirtes

src/Type/Constant/ConstantStringType.php

@@ -2,6 +2,7 @@
 
 namespace PHPStan\Type\Constant;
 
+use Error;
 use Nette\Utils\RegexpException;
 use Nette\Utils\Strings;
 use PhpParser\Node\Name;
@@ -290,7 +291,12 @@ public function setOffsetValueType(?Type $offsetType, Type $valueType, bool $uni
 			&& $valueStringType instanceof ConstantStringType
 		) {
 			$value = $this->value;
-			$value[$offsetType->getValue()] = $valueStringType->getValue();
+
+			try {
+				$value[$offsetType->getValue()] = $valueStringType->getValue();
+			} catch (Error) {
+				return new ErrorType();
+			}
 
 			return new self($value);
 		}

tests/PHPStan/Type/Constant/ConstantStringTypeTest.php

@@ -6,11 +6,13 @@
 use InvalidArgumentException;
 use PHPStan\Testing\PHPStanTestCase;
 use PHPStan\TrinaryLogic;
+use PHPStan\Type\ErrorType;
 use PHPStan\Type\GeneralizePrecision;
 use PHPStan\Type\Generic\GenericClassStringType;
 use PHPStan\Type\Generic\TemplateTypeFactory;
 use PHPStan\Type\Generic\TemplateTypeScope;
 use PHPStan\Type\Generic\TemplateTypeVariance;
+use PHPStan\Type\NullType;
 use PHPStan\Type\ObjectType;
 use PHPStan\Type\StaticType;
 use PHPStan\Type\Type;
@@ -169,4 +171,11 @@ public function testShortTextInvalidEncoding(): void
 		$this->assertSame("'\xc3Lorem ipsum dolor'", (new ConstantStringType("\xc3Lorem ipsum dolor"))->describe(VerbosityLevel::value()));
 	}
 
+	public function testSetInvalidValue(): void
+	{
+		$string = new ConstantStringType('internal:/node/add');
+		$result = $string->setOffsetValueType(new ConstantIntegerType(0), new NullType());
+		$this->assertInstanceOf(ErrorType::class, $result);
+	}
+
 }