编译小程序报Cannot read properties of null (reading 'getVariableForExportName')

是Rollup在Tree Shake的时候报错了，具体是uni-app的bug还是Rollup的还没去研究，可以在node-entry中添加一个判断临时解决

node_modules/rollup/dist/es/shared/node-entry.js

traceVariable(name, { importerForSideEffects, isExportAllSearch, searchedNamesAndModules } = EMPTY_OBJECT)  
{  
  const localVariable = this.scope.variables.get(name);  
  if (localVariable) {  
    return localVariable;  
  }  
  const importDescription = this.importDescriptions.get(name);  
  if (importDescription) {  
    const otherModule = importDescription.module;  
    if (otherModule instanceof Module && importDescription.name === '*') {  
      return otherModule.namespace;  
    }  
    // 添加这个判断  
    if (otherModule == null) {  
      return null;  
    }  
    const [declaration] = getVariableForExportNameRecursive(otherModule, importDescription.name, importerForSideEffects || this, isExportAllSearch, searchedNamesAndModules);  
    if (!declaration) {  
      return this.error(logMissingExport(importDescription.name, this.id, otherModule.id), importDescription.start);  
    }  
    return declaration;  
  }  
  return null;  
}