The 16.5.0 package released to unpkg currently has the production/profiling variant present for cjs builds but there is no equivalent for umd builds. 

i.e. There is the file https://unpkg.com/react@16.5.0/cjs/react.profiling.min.js but there is no https://unpkg.com/react@16.5.0/umd/react.profiling.min.js

It would be great if a future release had the profiling variant packaged as umd as well.

Also thanks for the awesome framework!
}
    const importSideEffects = Modules.getImportSideEffects();
    const externalModule = match[1];
    if (typeof importSideEffects[externalModule] !== 'boolean') {
      throw new Error(
        'An external module "' +
          externalModule +
          '" is used in a DEV-only code path ' +
          'but we do not know if it is safe to omit an unused require() to it in production. ' +
          'Please add it to the `importSideEffects` list in `scripts/rollup/modules.js`.'
      );
    }
    
    return;
  }
  if (typeof warning.code === 'string') {
    
    
    
    console.error();
    console.error(warning.message || warning);
    console.error();
    process.exit(1);
  } else {
    
    
    console.warn(warning.message || warning);
  }
}
function handleRollupError(error) {