fix(eslint-plugin-query): avoid prototype property false-positives in no-unstable-deps

.changeset/fix-no-unstable-deps-prototype-lookups.md

@@ -0,0 +1,5 @@
+---
+'@tanstack/eslint-plugin-query': patch
+---
+
+Fix false-positive warnings in `no-unstable-deps` rule caused by `Object.prototype` property lookups (`toString`, `valueOf`, etc.).

packages/eslint-plugin-query/src/__tests__/no-unstable-deps.test.ts

@@ -128,6 +128,55 @@ const baseTestCases = {
             }
           `,
         },
+        {
+          name: `should pass when functions or variables with Object.prototype names are used with ${reactHookAlias}`,
+          code: `
+            ${reactHookImport}
+            import { useQuery } from "@tanstack/react-query";
+
+            function Component() {
+              const toString = () => 'str';
+              const valueOf = 42;
+              const callback = ${reactHookInvocation}(() => { toString() }, [toString, valueOf]);
+              return;
+            }
+          `,
+        },
+        {
+          name: `should pass when custom functions named after Object.prototype methods are invoked`,
+          code: `
+            ${reactHookImport}
+            import { useQuery } from "@tanstack/react-query";
+
+            function toString() {
+              return 'test';
+            }
+
+            function Component() {
+              const res = toString();
+              const callback = ${reactHookInvocation}(() => { res }, [res]);
+              return;
+            }
+          `,
+        },
+        {
+          name: `should pass when a local function named after Object.prototype method is called alongside destructured query result with ${reactHookAlias}`,
+          code: `
+            ${reactHookImport}
+            import { useQuery } from "@tanstack/react-query";
+
+            function toString() {
+              return 'formatted';
+            }
+
+            function Component() {
+              const { data } = useQuery({ queryKey: ['test'], queryFn: () => 'test' });
+              const formatted = toString();
+              const callback = ${reactHookInvocation}(() => { formatted }, [data, formatted]);
+              return;
+            }
+          `,
+        },
       ]),
   invalid: ({
     reactHookImport,

packages/eslint-plugin-query/src/rules/no-unstable-deps/no-unstable-deps.rule.ts

@@ -35,9 +35,9 @@ export const rule = createRule({
   defaultOptions: [],
 
   create: detectTanstackQueryImports((context, _options, helpers) => {
-    const trackedVariables: Record<string, string> = {}
-    const trackedCustomHooks: Record<string, string> = {}
-    const hookAliasMap: Record<string, string> = {}
+    const trackedVariables: Record<string, string> = Object.create(null)
+    const trackedCustomHooks: Record<string, string> = Object.create(null)
+    const hookAliasMap: Record<string, string> = Object.create(null)
     const pendingVariableDeclarators: Array<TSESTree.VariableDeclarator> = []
     const pendingDependencyChecks: Array<{
       reactHook: string