Fix crash on dynamic numeric-string symbols

src/Rules/Classes/ClassConstantRule.php

@@ -64,7 +64,11 @@ public function processNode(Node $node, Scope $scope): array
 		}
 
 		foreach ($constantNameScopes as $constantName => $constantScope) {
-			$errors = array_merge($errors, $this->processSingleClassConstFetch($constantScope, $node, $constantName));
+			$errors = array_merge($errors, $this->processSingleClassConstFetch(
+				$constantScope,
+				$node,
+				(string) $constantName, // @phpstan-ignore cast.useless
+			));
 		}
 
 		return $errors;

src/Rules/Methods/CallMethodsRule.php

@@ -47,7 +47,11 @@ public function processNode(Node $node, Scope $scope): array
 		}
 
 		foreach ($methodNameScopes as $methodName => $methodScope) {
-			$errors = array_merge($errors, $this->processSingleMethodCall($methodScope, $node, $methodName));
+			$errors = array_merge($errors, $this->processSingleMethodCall(
+				$methodScope,
+				$node,
+				(string) $methodName, // @phpstan-ignore cast.useless
+			));
 		}
 
 		return $errors;

src/Rules/Methods/CallStaticMethodsRule.php

@@ -48,7 +48,11 @@ public function processNode(Node $node, Scope $scope): array
 		}
 
 		foreach ($methodNameScopes as $methodName => $methodScope) {
-			$errors = array_merge($errors, $this->processSingleMethodCall($methodScope, $node, $methodName));
+			$errors = array_merge($errors, $this->processSingleMethodCall(
+				$methodScope,
+				$node,
+				(string) $methodName, // @phpstan-ignore cast.useless
+			));
 		}
 
 		return $errors;

src/Rules/Variables/DefinedVariableRule.php

@@ -48,7 +48,11 @@ public function processNode(Node $node, Scope $scope): array
 		}
 
 		foreach ($variableNameScopes as $name => $variableScope) {
-			$errors = array_merge($errors, $this->processSingleVariable($variableScope, $node, $name));
+			$errors = array_merge($errors, $this->processSingleVariable(
+				$variableScope,
+				$node,
+				(string) $name, // @phpstan-ignore cast.useless
+			));
 		}
 
 		return $errors;

tests/PHPStan/Analyser/AnalyserIntegrationTest.php

@@ -1570,6 +1570,20 @@ public function testBug12800(): void
 		$this->assertNoErrors($errors);
 	}
 
+	public function testBug12949(): void
+	{
+		// Fetching class constants with a dynamic name is supported only on PHP 8.3 and later
+		if (PHP_VERSION_ID < 80300) {
+			$this->markTestSkipped('Test requires PHP 8.3.');
+		}
+
+		$errors = $this->runAnalyse(__DIR__ . '/data/bug-12949.php');
+		$this->assertCount(3, $errors);
+		$this->assertSame('Call to an undefined method object::0().', $errors[0]->getMessage());
+		$this->assertSame('Call to an undefined static method object::0().', $errors[1]->getMessage());
+		$this->assertSame('Access to undefined constant object::0.', $errors[2]->getMessage());
+	}
+
 	/**
 	 * @param string[]|null $allAnalysedFiles
 	 * @return Error[]

tests/PHPStan/Analyser/data/bug-12949.php

@@ -0,0 +1,19 @@
+<?php
+
+namespace Bug12949;
+
+function doFoo():void {
+	$b = '0';
+	${$b} = 1;
+
+	echo "";
+}
+
+function doBar(object $o):void {
+	$b = '0';
+	$o->{$b}();
+	$o::{$b}();
+	echo $o::{$b};
+
+	echo "";
+}