signal insight

Qwen Code fixes Windows PowerShell process leak in tool execution

Qwen Code closed a critical Windows bug where each tool call could leave a PowerShell process running until memory exhaustion. The fix used process-tree cleanup to improve long-running TUI reliability for Windows users.

Published Jun 27, 2026 Updated Jun 27, 2026 2 sources

QwenQwen Codeai coding toolsbug fixmedium impact

ai-coding-toolswindowsreliabilityagentsbug fix

Impact: medium
Confidence: 88%
Change type: bug fix
First seen: Jun 27, 2026
Last updated: Jun 27, 2026
Audience: developersWindows engineering teamsAI coding tool buyers
Status: Ready

Summary

What changed

Qwen Code merged a fix to kill the full PTY shell tree on Windows and stop unreaped PowerShell processes after tool calls.

Why it matters

Windows reliability remains a major adoption blocker for coding agents. Fixing process leaks is not flashy, but it directly affects whether teams can run long agent sessions without exhausting local machines.

Evidence excerpt

The Qwen Code digest identified issue #5873 as a critical Windows PowerShell leak fixed by PR #5892 using tree-kill for the PTY shell tree.