Its theme's rank, 14 days: 17 on the Claude Code sheet
3 people reported

All time, since Oct 23.

Eval sandbox blocks workspace writes

“Sandboxed Bash can write to the run's working directory, as the docs say ("Writes are confined to the run's workspace"), wherever TMPDIR points.”

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I hit this bug: rapsheet.dev/sheets/claude-code/issues/20653/file
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Growing. 1 report in the last 7 days and none the week before, down from 2 a week at the late-October peak.

Plugin eval sandbox denies Bash writes in its own workspace on Linux. Each run's workspace sits under /tmp (default TMPDIR) and writes fail, while the sandbox denyWrite list covers /tmp; Write and Edit still work.

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File my report
Where
plugin eval sandbox
Error text
/bin/bash: line 1: out.txt: Read-only file system
Versions
2.1.309 to 2.1.316
Platforms
Linux
How bad
Breaks a normal workflow. Some reports say it used to work.

Part of: Linux sandbox fails every command3 bugs

  1. Sandbox apply-seccomp setgroups failure14 people
  2. Sandbox read-only bind breaks Bash3 people

Original reports3, newest first

  1. plugin eval on Linux: run sandbox denies writes to its own working directory when TMPDIR is under /tmp#106687
  2. plugin eval: sandboxed Bash cannot write the run workspace when TMPDIR is under /tmp ("Read-only file system")#104797
  3. plugin eval (Linux, 2.1.304–2.1.309): sandbox denies every write in the agent's workspace — //tmp denyWrite covers the /tmp/claude-eval-* root#104631

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