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test test_downcast_mut ... error: Undefined Behavior: trying to retag from <137701> for Unique permission at alloc44937[0x38], but that tag only grants SharedReadOnly permission for this location
--> src/ptr.rs:170:18
|
170 | unsafe { &mut *self.ptr.as_ptr() }
| ^^^^^^^^^^^^^^^^^^^^^^^ this error occurs as part of retag at alloc44937[0x38..0x50]
|
= help: this indicates a potential bug in the program: it performed an invalid operation, but the Stacked Borrows rules it violated are still experimental
= help: see https://github.com/rust-lang/unsafe-code-guidelines/blob/master/wip/stacked-borrows.md for further information
help: <137701> was created by a SharedReadOnly retag at offsets [0x38..0x50]
--> src/ptr.rs:89:18
|
89 | ptr: NonNull::from(ptr),
| ^^^^^^^^^^^^^^^^^^
= note: this is on thread `test_downcast_mut`
= note: stack backtrace:
0: anyhow::ptr::Mut::<'_, HighLevel>::deref_mut
at src/ptr.rs:170:18: 170:41
1: anyhow::error::<impl anyhow::Error>::downcast_mut::<HighLevel>
at src/error.rs:560:18: 560:46
2: test_downcast_mut
at tests/test_context.rs:171:5: 171:36
3: test_downcast_mut::{closure#0}
at tests/test_context.rs:168:23: 168:23
eleboucher
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Jun 26, 2026
This PR contains the following updates: | Package | Type | Update | Change | |---|---|---|---| | [anyhow](https://github.com/dtolnay/anyhow) | workspace.dependencies | patch | `1.0.102` → `1.0.103` | --- ### Release Notes <details> <summary>dtolnay/anyhow (anyhow)</summary> ### [`v1.0.103`](https://github.com/dtolnay/anyhow/releases/tag/1.0.103) [Compare Source](dtolnay/anyhow@1.0.102...1.0.103) - Fix Stacked Borrows violation (UB) in `Error::downcast_mut` ([#​451](dtolnay/anyhow#451), [#​452](dtolnay/anyhow#452)) </details> --- ### Configuration 📅 **Schedule**: Branch creation - At any time (no schedule defined), Automerge - At any time (no schedule defined). 🚦 **Automerge**: Disabled by config. Please merge this manually once you are satisfied. ♻ **Rebasing**: Whenever PR becomes conflicted, or you tick the rebase/retry checkbox. 🔕 **Ignore**: Close this PR and you won't be reminded about this update again. --- - [ ] <!-- rebase-check -->If you want to rebase/retry this PR, check this box --- This PR has been generated by [Renovate Bot](https://github.com/renovatebot/renovate). <!--renovate-debug:eyJjcmVhdGVkSW5WZXIiOiI0My4xMDEuMSIsInVwZGF0ZWRJblZlciI6IjQzLjEwMS4xIiwidGFyZ2V0QnJhbmNoIjoibWFpbiIsImxhYmVscyI6WyJ0eXBlL3BhdGNoIl19--> Reviewed-on: https://codeberg.org/towonel/towonel/pulls/43
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Fixes #451.