fix: pass optionLoc when validating plugin object

packages/babel-core/src/config/validation/options.js

@@ -272,7 +272,8 @@ export type OptionsSource =
   | "configfile"
   | "babelrcfile"
   | "extendsfile"
-  | "preset";
+  | "preset"
+  | "plugin";
 
 type RootPath = $ReadOnly<{
   type: "root",

packages/babel-core/src/config/validation/plugins.js

@@ -84,10 +84,19 @@ export type PluginObject = {
 };
 
 export function validatePluginObject(obj: {}): PluginObject {
+  const rootPath: RootPath = {
+    type: "root",
+    source: "plugin",
+  };
   Object.keys(obj).forEach(key => {
     const validator = VALIDATORS[key];
+    const optLoc = {
+      type: "option",
+      name: key,
+      parent: rootPath,
+    };
 
-    if (validator) validator(key, obj[key]);
+    if (validator) validator(optLoc, obj[key]);
     else throw new Error(`.${key} is not a valid Plugin property`);
   });
 

packages/babel-core/test/config-loading.js

@@ -322,6 +322,21 @@ describe("@babel/core config loading", () => {
         }
       }
     });
+
+    it("should thrown when plugin is not valid", () => {
+      const fooPlugin = {
+        inherits: "inhertis-should-not-be-string",
+      };
+      const opts = {
+        cwd: path.dirname(FILEPATH),
+        filename: FILEPATH,
+        plugins: [fooPlugin],
+      };
+
+      expect(() => loadConfig(opts)).toThrow(
+        /\.inherits must be a function, or undefined/,
+      );
+    });
   });
 
   describe("caller metadata", () => {