Nothing open on GitHub. Fix merged in #94339 on 27 Aug 2026. Check it covers your case.
The short answer
0open issues
0open PRs
3items grouped
- Known?
- Yes. 3 related items grouped here, 1 issue already closed.
- Fix event
- A fix was merged to main in PR #94339. Check it covers your case. No release data is tracked.
- Tracker
- The maintainers' tracker marks this
unresolved. That is separate from the fix event. - Still open
- Nothing open on GitHub.
An inverted boolean condition in the MCP stdio subprocess liveness check caused all stdio tool calls to unconditionally fast-fail with a 'subprocess has exited' error. These members identify the bug and apply a fix.
Open issues0
Open PRs0
Fixes on record
-
#94339 fix(mcp): un-invert the stdio children liveness check
files:
tests/tools/test_mcp_stdio_children_dead.py,tools/mcp_tool.py
1 PR closed without merging
From the close comments: superseded by another PR 1
-
#94661 fix(mcp): un-invert stdio children liveness check — stop unconditional stdio fast-fail (Closes #94637) · superseded by another PR →
#94339
Closed issues · 1
- Closed#94637MCP stdio tool calls always fast-fail with 'subprocess has exited' after #85125 3b
How this cluster was grouped
-
Link evidence (
structural links throughout): every member is connected by structural evidence: shared changed files, or a closing/superseded reference. -
Pairwise link density
0.67: the share of item pairs that carry a link, counting a structural link in full and a relevance-only link at 0.36.1.00means every pair is linked.
Pick up a Lab task
Check whether a fix covers the open issues here, with your own agent. Bring back evidence for maintainers.
Open the LabAt a glance
- Merged PRs
- #94339
- Closed issues
- 1
- Attempts
- 1 PR closed without merging
- Fix link checked
- 27 Aug 2026