LXC exec silently drops and replaces a caller-supplied MXC_EXEC_ID

[dhoehna]

src/backends/lxc/common/src/lxc_bindings.rs removes a caller-supplied MXC_EXEC_ID and substitutes its own.

[github-actions]

Triage complete.

Labels applied: OS-Linux, Area-Executor-LXC

Assigned: @SohamDas2021 (LXC / Linux backend owner)

The bug is in src/backends/lxc/common/src/lxc_bindings.rs where exec argument construction silently strips any caller-supplied env entry keyed MXC_EXEC_ID and replaces it with an internal marker token. The fix should either reject the caller-supplied value with a clear error or namespace the internal marker to avoid collision.

Maintainers: Comment /investigate to check whether this issue or bug is valid against the most current code. Copilot will also produce a report with the changes that will be needed. For a small, unambiguous documentation or test fix, it may also create one draft PR.

Generated by 🏷️ Issue Triage for #891 · sonnet46 · 18.7 AIC · ⌖ 5.33 AIC · ⊞ 7.4K · ◷

[dhoehna]

Consolidated into #900 -- [LXC] Exec: streaming, timeouts, and process lifetime.

The backlog now carries one issue per area instead of one per finding. This report is reproduced there in full and unedited; nothing here is dropped. Track and fix it at #900.