makeExecutableSchema fails if typeDefs includes a directive named toString

[lesleydreyer]

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Describe the bug

if I pass a directive in typeDefs to makeExecutableSchema named @tostring it fails saying TypeError: 'caller', 'callee', and 'arguments' properties may not be accessed on strict mode functions or the arguments objects for calls to them at mergeDirective
If I change the toString to something like toBoolean it works so it seems to just be "toString"

To Reproduce Steps to reproduce the behavior:

const schema = makeExecutableSchema({
    typeDefs: `
        directive @toString on FIELD_DEFINITION | FIELD
        type Something {
            foo: String
        }`
});

Researching it but I think it might be happening because it's a method on the Object prototype in mergedResultMap on mergeGraphQLNodes.

https://codesandbox.io/p/devbox/brave-visvesvaraya-49xx8m

Expected behavior

Should be able to create a schema with a toString directive

Environment:

• OS:
• @graphql-tools/...:
• NodeJS:

Additional context