Fix(babel-preset-env): check api.caller is a function to avoid… (#10649)

love2me · nicolo-ribaudo · commit f8eb290da121 · 2019-11-05T14:39:14.000+01:00
diff --git a/packages/babel-preset-env/src/index.js b/packages/babel-preset-env/src/index.js
@@ -237,7 +237,7 @@ export default declare((api, opts) => {
       modules !== "auto" || !api.caller || !api.caller(supportsStaticESM),
     shouldTransformDynamicImport:
       modules !== "auto" || !api.caller || !api.caller(supportsDynamicImport),
-    shouldParseTopLevelAwait: api.caller(supportsTopLevelAwait),
+    shouldParseTopLevelAwait: !api.caller || api.caller(supportsTopLevelAwait),
   });
 
   const pluginNames = filterItems(
