bug: SyntaxError: Named export 'LRUCache' not found - Package fails to start due to import issue #71

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opened 2025-10-14 15:40:30 -06:00 by navan · 0 comments

navan commented

2025-10-14 15:40:30 -06:00

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Originally created by @tr4m0ryp on 9/24/2025

The task-master-ai package (version 0.27.0) fails to start with a SyntaxError related to importing LRUCache from the lru-cache module. The error message indicates that the named export is not found, suggesting an issue with how the module is being imported.

Steps to Reproduce:

Run npx -y task-master-ai --help or any command that executes the package
Observe the error in the terminal
Expected Behavior:

The package should start successfully and display help information or execute the requested command.

Actual Behavior:

The package crashes with the following error:
SyntaxError: Named export 'LRUCache' not found. The requested module 'lru-cache' is a CommonJS module, which may not support all module.exports as named exports.
CommonJS modules can always be imported via the default export, for example using:
import pkg from 'lru-cache';
const {LRUCache} = pkg;

Environment:

OS: Linux
Node.js version: v22.19.0
Package version: 0.27.0
Command used: npx -y task-master-ai --help
Additional Context:

The package is marked as deprecated with a note saying "coming out with a patch to fix this asap"
This affects both the MCP server (task-master-ai) and CLI (task-master) binaries
The issue prevents the MCP integration from working in VS Code/Cursor
lru-cache version in dependencies: ^10.2.0 (which is ESM, but the error suggests it's being treated as CommonJS)
Possible Solution:

The error suggests using a default import instead of named import for LRUCache. The code likely needs to be changed from:
import { LRUCache } from 'lru-cache';

to:
import pkg from 'lru-cache';
const { LRUCache } = pkg;

*Originally created by @tr4m0ryp on 9/24/2025* The [task-master-ai](vscode-file://vscode-app/usr/share/code/resources/app/out/vs/code/electron-browser/workbench/workbench.html) package (version 0.27.0) fails to start with a SyntaxError related to importing LRUCache from the lru-cache module. The error message indicates that the named export is not found, suggesting an issue with how the module is being imported. Steps to Reproduce: Run npx -y task-master-ai --help or any command that executes the package Observe the error in the terminal Expected Behavior: The package should start successfully and display help information or execute the requested command. Actual Behavior: The package crashes with the following error: SyntaxError: Named export 'LRUCache' not found. The requested module 'lru-cache' is a CommonJS module, which may not support all module.exports as named exports. CommonJS modules can always be imported via the default export, for example using: import pkg from 'lru-cache'; const {LRUCache} = pkg; Environment: OS: Linux Node.js version: v22.19.0 Package version: 0.27.0 Command used: npx -y task-master-ai --help Additional Context: The package is marked as deprecated with a note saying "coming out with a patch to fix this asap" This affects both the MCP server ([task-master-ai](vscode-file://vscode-app/usr/share/code/resources/app/out/vs/code/electron-browser/workbench/workbench.html)) and CLI ([task-master](vscode-file://vscode-app/usr/share/code/resources/app/out/vs/code/electron-browser/workbench/workbench.html)) binaries The issue prevents the MCP integration from working in VS Code/Cursor lru-cache version in dependencies: ^10.2.0 (which is ESM, but the error suggests it's being treated as CommonJS) Possible Solution: The error suggests using a default import instead of named import for LRUCache. The code likely needs to be changed from: import { LRUCache } from 'lru-cache'; to: import pkg from 'lru-cache'; const { LRUCache } = pkg;