[INFO] fetching crate imp 0.1.0...
[INFO] testing imp-0.1.0 against master#cdb45c87e2cd43495379f7e867e3cc15dcee9f93 for pr-145838-1
[INFO] extracting crate imp 0.1.0 into /workspace/builds/worker-2-tc1/source
[INFO] started tweaking crates.io crate imp 0.1.0
[INFO] finished tweaking crates.io crate imp 0.1.0
[INFO] tweaked toml for crates.io crate imp 0.1.0 written to /workspace/builds/worker-2-tc1/source/Cargo.toml
[INFO] validating manifest of crates.io crate imp 0.1.0 on toolchain cdb45c87e2cd43495379f7e867e3cc15dcee9f93
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+cdb45c87e2cd43495379f7e867e3cc15dcee9f93" "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" "+cdb45c87e2cd43495379f7e867e3cc15dcee9f93" "generate-lockfile" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Updating crates.io index
[INFO] [stderr]      Locking 13 packages to latest compatible versions
[INFO] [stderr]       Adding sha2 v0.8.2 (available: v0.10.9)
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+cdb45c87e2cd43495379f7e867e3cc15dcee9f93" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc1/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@sha256:7ad1b28ee6f5f7f699f6cf7015098d6ccdd96d6f2d78dd06228f5b4c9faf309c" "/opt/rustwide/cargo-home/bin/cargo" "+cdb45c87e2cd43495379f7e867e3cc15dcee9f93" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] ce72f797c9de453db2f336c0ecf7bee96c5bbf80fd484d4aab1e7570822533ff
[INFO] running `Command { std: "docker" "start" "-a" "ce72f797c9de453db2f336c0ecf7bee96c5bbf80fd484d4aab1e7570822533ff", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "ce72f797c9de453db2f336c0ecf7bee96c5bbf80fd484d4aab1e7570822533ff", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "ce72f797c9de453db2f336c0ecf7bee96c5bbf80fd484d4aab1e7570822533ff", kill_on_drop: false }`
[INFO] [stdout] ce72f797c9de453db2f336c0ecf7bee96c5bbf80fd484d4aab1e7570822533ff
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc1/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@sha256:7ad1b28ee6f5f7f699f6cf7015098d6ccdd96d6f2d78dd06228f5b4c9faf309c" "/opt/rustwide/cargo-home/bin/cargo" "+cdb45c87e2cd43495379f7e867e3cc15dcee9f93" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] b9698324843c9d77468175dd6bc349e6deb19fa3c318ca58ffda7278ade52bdd
[INFO] running `Command { std: "docker" "start" "-a" "b9698324843c9d77468175dd6bc349e6deb19fa3c318ca58ffda7278ade52bdd", kill_on_drop: false }`
[INFO] [stderr]    Compiling typenum v1.18.0
[INFO] [stderr]    Compiling byte-tools v0.3.1
[INFO] [stderr]    Compiling fake-simd v0.1.2
[INFO] [stderr]    Compiling opaque-debug v0.2.3
[INFO] [stderr]    Compiling arrayref v0.3.9
[INFO] [stderr]    Compiling block-padding v0.1.5
[INFO] [stderr]    Compiling generic-array v0.12.4
[INFO] [stderr]    Compiling block-buffer v0.7.3
[INFO] [stderr]    Compiling digest v0.8.1
[INFO] [stderr]    Compiling sha2 v0.8.2
[INFO] [stderr]    Compiling imp v0.1.0 (/opt/rustwide/workdir)
[INFO] [stderr] error: could not compile `imp` (lib) due to 1 previous error
[INFO] [stdout] error: casting `&T` to `&mut T` is undefined behavior, even if the reference is unused, consider instead using an `UnsafeCell`
[INFO] [stdout]   --> src/lib.rs:38:27
[INFO] [stdout]    |
[INFO] [stdout] 38 |         let db = unsafe { &mut *(&data[begin..end] as *const [u8] as *mut [u8]) };
[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: `#[deny(invalid_reference_casting)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] running `Command { std: "docker" "inspect" "b9698324843c9d77468175dd6bc349e6deb19fa3c318ca58ffda7278ade52bdd", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "b9698324843c9d77468175dd6bc349e6deb19fa3c318ca58ffda7278ade52bdd", kill_on_drop: false }`
[INFO] [stdout] b9698324843c9d77468175dd6bc349e6deb19fa3c318ca58ffda7278ade52bdd