Fix: no-deprecated-api crash in self-assign (fixes #87)

Author: mysticatea

lib/rules/no-deprecated-api.js

@@ -193,6 +193,7 @@ function create(context) {
     const ignoredModuleItems = options.ignoreModuleItems || []
     const ignoredGlobalItems = options.ignoreGlobalItems || []
     let globalScope = null
+    const varStack = []
 
     /**
      * Reports a use of a deprecated API.
@@ -400,9 +401,16 @@ function create(context) {
      * @returns {void}
      */
     function checkVariable(variable, path, infoMap) {
+        if (varStack.indexOf(variable) !== -1) {
+            return
+        }
+        varStack.push(variable)
+
         for (const reference of variable.references.filter(r => r.isRead())) {
             checkProperties(reference.identifier, path, infoMap)
         }
+
+        varStack.pop()
     }
 
     /**

tests/lib/rules/no-deprecated-api.js

@@ -152,6 +152,12 @@ ruleTester.run("no-deprecated-api", rule, {
             env: {node: true},
             options: [{ignoreIndirectDependencies: true}],
         },
+
+        // https://github.com/mysticatea/eslint-plugin-node/issues/87
+        {
+            code: "let fs = fs || require(\"fs\")",
+            env: {node: true, es6: true},
+        },
     ],
     invalid: [
         //----------------------------------------------------------------------