`Invalid mapping` error trying to use babel require hook and polyfill with react jsx transpile - source-maps

Question

I'm trying to use babel for both ES6 and JSX transpilation for mocha tests.
Suppose we have test.jsx like this:
var React = require("react");
React.createClass({
render: function(){
return (<div>Hello World</div>);
}
});
Running babel test.jsx gives us valid transformed code. No problem.
I would expect that if I create a test.js file like this:
require("babel/register");
require("./test.jsx");
And then run node test.js, it would transpile my jsx for me in line, but instead I get an error:
c:\Users\user\dev\app\node_modules\babel\node_modules\babel-core\lib\babel\t
ransformation\file\index.js:628
throw err;
^
Error: c:/Users/user/dev/app/test.jsx: Invalid mapping: {"generated":{"line"
:6,"column":11},"source":"c:/Users/user/dev/app/test.jsx","name":null}
at SourceMapGenerator_validateMapping [as _validateMapping] (c:/Users/user/dev/app/node_modules\babel\node_modules\source-map\lib\source-map\source-map-
generator.js:275:15)
at SourceMapGenerator_addMapping [as addMapping] (c:/Users/user/dev/app/
node_modules\babel\node_modules\source-map\lib\source-map\source-map-generator.j
s:105:14)
at SourceMap.mark (c:/Users/user/dev/app/node_modules\babel\node_modules
\babel-core\lib\babel\generation\source-map.js:65:9)
at CodeGenerator.print (c:/Users/user/dev/app/node_modules\babel\node_mo
dules\babel-core\lib\babel\generation\index.js:236:16)
at NodePrinter.plain (c:/Users/user/dev/app/node_modules\babel\node_modu
les\babel-core\lib\babel\generation\node\printer.js:16:27)
at CodeGenerator.ReturnStatement (c:/Users/user/dev/app/node_modules\bab
el\node_modules\babel-core\lib\babel\generation\generators\statements.js:120:13)
at CodeGenerator.print c:/Users/user/dev/app/node_modules\babel\node_mo
dules\babel-core\lib\babel\generation\index.js:238:22)
at NodePrinter.plain (c:/Users/user/dev/app/node_modules\babel\node_modu
les\babel-core\lib\babel\generation\node\printer.js:16:27)
at CodeGenerator.printJoin (c:/Users/user/dev/app/node_modules\babel\nod
e_modules\babel-core\lib\babel\generation\index.js:286:13)
at NodePrinter.sequence (c:/Users/user/dev/app/node_modules\babel\node_m
odul
es\babel-core\lib\babel\generation\node\printer.js:23:27)
According to the docs, it looks like this should work. Am I missing something obvious, or should I report this as a bug in babel?

Answer 1

This was a bug in acorn-jsx, the JSX parser that Babel uses. The recommended fix would be:
rm -rf node_modules/babel && npm install