[INFO] fetching crate toolshed 0.8.1...
[INFO] testing toolshed-0.8.1 against try#c2e32f1c9652b13ed99608599c1e855462f421f3 for pr-146098-8
[INFO] extracting crate toolshed 0.8.1 into /workspace/builds/worker-6-tc2/source
[INFO] started tweaking crates.io crate toolshed 0.8.1
[INFO] finished tweaking crates.io crate toolshed 0.8.1
[INFO] tweaked toml for crates.io crate toolshed 0.8.1 written to /workspace/builds/worker-6-tc2/source/Cargo.toml
[INFO] validating manifest of crates.io crate toolshed 0.8.1 on toolchain c2e32f1c9652b13ed99608599c1e855462f421f3
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+c2e32f1c9652b13ed99608599c1e855462f421f3" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+c2e32f1c9652b13ed99608599c1e855462f421f3" "generate-lockfile" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Updating crates.io index
[INFO] [stderr]      Locking 12 packages to latest compatible versions
[INFO] [stderr]       Adding rustc-hash v1.1.0 (available: v2.1.1)
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+c2e32f1c9652b13ed99608599c1e855462f421f3" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-tc2/source:/opt/rustwide/workdir:ro,Z" "-v" "/var/lib/crater-agent-workspace/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/var/lib/crater-agent-workspace/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--user" "0:0" "--network" "none" "ghcr.io/rust-lang/crates-build-env/linux@sha256:4848fb76d95f26979359cc7e45710b1dbc8f3acb7aeedee7c460d7702230f228" "/opt/rustwide/cargo-home/bin/cargo" "+c2e32f1c9652b13ed99608599c1e855462f421f3" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 216b541abc977eba2272f26e8cf99ede766d3a53f377a921b0093c351b5f6280
[INFO] running `Command { std: "docker" "start" "-a" "216b541abc977eba2272f26e8cf99ede766d3a53f377a921b0093c351b5f6280", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "216b541abc977eba2272f26e8cf99ede766d3a53f377a921b0093c351b5f6280", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "216b541abc977eba2272f26e8cf99ede766d3a53f377a921b0093c351b5f6280", kill_on_drop: false }`
[INFO] [stdout] 216b541abc977eba2272f26e8cf99ede766d3a53f377a921b0093c351b5f6280
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-tc2/source:/opt/rustwide/workdir:ro,Z" "-v" "/var/lib/crater-agent-workspace/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/var/lib/crater-agent-workspace/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=forbid" "-e" "RUSTDOCFLAGS=--cap-lints=forbid" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--user" "0:0" "--network" "none" "ghcr.io/rust-lang/crates-build-env/linux@sha256:4848fb76d95f26979359cc7e45710b1dbc8f3acb7aeedee7c460d7702230f228" "/opt/rustwide/cargo-home/bin/cargo" "+c2e32f1c9652b13ed99608599c1e855462f421f3" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 5a6bc7276f4a8a80054da6f62e8125b6262519f8e684467d14978a56f84b3ee3
[INFO] running `Command { std: "docker" "start" "-a" "5a6bc7276f4a8a80054da6f62e8125b6262519f8e684467d14978a56f84b3ee3", kill_on_drop: false }`
[INFO] [stderr]    Compiling rustc-hash v1.1.0
[INFO] [stderr]    Compiling toolshed v0.8.1 (/opt/rustwide/workdir)
[INFO] [stdout] error: assigning to `&T` is undefined behavior, consider using an `UnsafeCell`
[INFO] [stdout]   --> src/cell.rs:56:18
[INFO] [stdout]    |
[INFO] [stdout] 56 |         unsafe { write_volatile(self as *const CopyCell<T> as *const T as *mut T, value) };
[INFO] [stdout]    |                  ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: for more information, visit <https://doc.rust-lang.org/book/ch15-05-interior-mutability.html>
[INFO] [stdout]    = note: even for types with interior mutability, the only legal way to obtain a mutable pointer from a shared reference is through `UnsafeCell::get`
[INFO] [stdout]    = note: `#[deny(invalid_reference_casting)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: hiding a lifetime that's named elsewhere is confusing
[INFO] [stdout]    --> src/arena.rs:266:67
[INFO] [stdout]     |
[INFO] [stdout] 266 |     pub fn alloc_nul_term_str<'arena>(&'arena self, val: &str) -> NulTermStr {
[INFO] [stdout]     |                                        ------                     ^^^^^^^^^^ the same lifetime is hidden here
[INFO] [stdout]     |                                        |
[INFO] [stdout]     |                                        the lifetime is named here
[INFO] [stdout]     |
[INFO] [stdout]     = help: the same lifetime is referred to in inconsistent ways, making the signature confusing
[INFO] [stdout]     = note: `#[warn(mismatched_lifetime_syntaxes)]` on by default
[INFO] [stdout] help: consistently use `'arena`
[INFO] [stdout]     |
[INFO] [stdout] 266 |     pub fn alloc_nul_term_str<'arena>(&'arena self, val: &str) -> NulTermStr<'arena> {
[INFO] [stdout]     |                                                                             ++++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `toolshed` (lib) due to 1 previous error; 1 warning emitted
[INFO] running `Command { std: "docker" "inspect" "5a6bc7276f4a8a80054da6f62e8125b6262519f8e684467d14978a56f84b3ee3", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "5a6bc7276f4a8a80054da6f62e8125b6262519f8e684467d14978a56f84b3ee3", kill_on_drop: false }`
[INFO] [stdout] 5a6bc7276f4a8a80054da6f62e8125b6262519f8e684467d14978a56f84b3ee3
