Report implicit mixed in boolean conditions on level 10

src/Rules/BooleansInConditions/BooleanRuleHelper.php

@@ -22,8 +22,11 @@ public function __construct(RuleLevelHelper $ruleLevelHelper)
 	public function passesAsBoolean(Scope $scope, Expr $expr): bool
 	{
 		$type = $scope->getType($expr);
-		if ($type instanceof MixedType) {
-			return !$type->isExplicitMixed();
+		if ($type instanceof ErrorType) {
+			return true;
+		}
+		if ($type instanceof MixedType && $type->isExplicitMixed()) {
+			return false;
 		}
 		$typeToCheck = $this->ruleLevelHelper->findTypeToCheck(
 			$scope,

tests/Levels/data/onlyBooleans-0.json

@@ -3,5 +3,15 @@
         "message": "Only booleans are allowed in an if condition, mixed given.",
         "line": 32,
         "ignorable": true
+    },
+    {
+        "message": "Function doesNotExist not found.",
+        "line": 52,
+        "ignorable": true
+    },
+    {
+        "message": "Undefined variable: $undefined",
+        "line": 55,
+        "ignorable": true
     }
 ]

tests/Levels/data/onlyBooleans-10.json

@@ -0,0 +1,17 @@
+[
+    {
+        "message": "Only booleans are allowed in an if condition, mixed given.",
+        "line": 29,
+        "ignorable": true
+    },
+    {
+        "message": "Only booleans are allowed in an if condition, mixed given.",
+        "line": 45,
+        "ignorable": true
+    },
+    {
+        "message": "Only booleans are allowed in an if condition, mixed given.",
+        "line": 49,
+        "ignorable": true
+    }
+]

tests/Levels/data/onlyBooleans-6.json

@@ -3,5 +3,10 @@
         "message": "Method PHPStan\\Levels\\OnlyBooleans\\Foo::doFoo() has parameter $mixed with no type specified.",
         "line": 14,
         "ignorable": true
+    },
+    {
+        "message": "Method PHPStan\\Levels\\OnlyBooleans\\Foo::doBar() has parameter $array with no value type specified in iterable type array.",
+        "line": 43,
+        "ignorable": true
     }
 ]

tests/Levels/data/onlyBooleans.php

@@ -40,4 +40,21 @@ public function doFoo(
 		}
 	}
 
+	public function doBar(array $array): void
+	{
+		if ($array['foo']) {
+
+		}
+		$value = $array[0] ?? null;
+		if ($value) {
+
+		}
+		if (doesNotExist()) {
+
+		}
+		if ($undefined) {
+
+		}
+	}
+
 }