[INFO] fetching crate doubly-linked-list 0.2.0...
[INFO] checking doubly-linked-list-0.2.0 against master#3f1be1ec7ec3d8e80beb381ee82164a0aa3ca777 for pr-132289
[INFO] extracting crate doubly-linked-list 0.2.0 into /workspace/builds/worker-0-tc1/source
[INFO] validating manifest of crates.io crate doubly-linked-list 0.2.0 on toolchain 3f1be1ec7ec3d8e80beb381ee82164a0aa3ca777
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+3f1be1ec7ec3d8e80beb381ee82164a0aa3ca777" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate doubly-linked-list 0.2.0
[INFO] finished tweaking crates.io crate doubly-linked-list 0.2.0
[INFO] tweaked toml for crates.io crate doubly-linked-list 0.2.0 written to /workspace/builds/worker-0-tc1/source/Cargo.toml
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+3f1be1ec7ec3d8e80beb381ee82164a0aa3ca777" "generate-lockfile" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Updating crates.io index
[INFO] [stderr]      Locking 1 package to latest compatible version
[INFO] [stderr]       Adding volatile v0.4.6 (available: v0.6.1)
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+3f1be1ec7ec3d8e80beb381ee82164a0aa3ca777" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded volatile v0.4.6
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-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@sha256:4a844ea9eb2546a2d2c7022eacef16ef2e8229c7fbb2c7d4d55a9ceca922f72d" "/opt/rustwide/cargo-home/bin/cargo" "+3f1be1ec7ec3d8e80beb381ee82164a0aa3ca777" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 8a11d8197475feb74b2c467444011cc9da77091eb5d443b5449c21d5829b7425
[INFO] running `Command { std: "docker" "start" "-a" "8a11d8197475feb74b2c467444011cc9da77091eb5d443b5449c21d5829b7425", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "8a11d8197475feb74b2c467444011cc9da77091eb5d443b5449c21d5829b7425", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "8a11d8197475feb74b2c467444011cc9da77091eb5d443b5449c21d5829b7425", kill_on_drop: false }`
[INFO] [stdout] 8a11d8197475feb74b2c467444011cc9da77091eb5d443b5449c21d5829b7425
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-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@sha256:4a844ea9eb2546a2d2c7022eacef16ef2e8229c7fbb2c7d4d55a9ceca922f72d" "/opt/rustwide/cargo-home/bin/cargo" "+3f1be1ec7ec3d8e80beb381ee82164a0aa3ca777" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 848f51e8290552a8f7befded1d257493ea594e6d6f7629f553c0d03a8692fd19
[INFO] running `Command { std: "docker" "start" "-a" "848f51e8290552a8f7befded1d257493ea594e6d6f7629f553c0d03a8692fd19", kill_on_drop: false }`
[INFO] [stderr]     Checking volatile v0.4.6
[INFO] [stderr]     Checking doubly-linked-list v0.2.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: the feature `core_intrinsics` is internal to the compiler or standard library
[INFO] [stdout]  --> src/lib.rs:2:12
[INFO] [stdout]   |
[INFO] [stdout] 2 | #![feature(core_intrinsics)]
[INFO] [stdout]   |            ^^^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: using it is strongly discouraged
[INFO] [stdout]   = note: `#[warn(internal_features)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the feature `core_intrinsics` is internal to the compiler or standard library
[INFO] [stdout]  --> src/lib.rs:2:12
[INFO] [stdout]   |
[INFO] [stdout] 2 | #![feature(core_intrinsics)]
[INFO] [stdout]   |            ^^^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: using it is strongly discouraged
[INFO] [stdout]   = note: `#[warn(internal_features)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: assigning to `&T` is undefined behavior, consider using an `UnsafeCell`
[INFO] [stdout]    --> src/lib.rs:161:14
[INFO] [stdout]     |
[INFO] [stdout] 161 |               *$entry = ListHead {
[INFO] [stdout]     |  ______________^
[INFO] [stdout] 162 | |                 prev: core::ptr::null_mut(),
[INFO] [stdout] 163 | |                 next: core::ptr::null_mut(),
[INFO] [stdout] 164 | |             };
[INFO] [stdout]     | |_____________^
[INFO] [stdout] ...
[INFO] [stdout] 354 |           list_del!(to_list_head_ptr!(demo2.list_head));
[INFO] [stdout]     |           --------------------------------------------- in this macro invocation
[INFO] [stdout]     |
[INFO] [stdout]     = note: for more information, visit <https://doc.rust-lang.org/book/ch15-05-interior-mutability.html>
[INFO] [stdout]     = note: `#[deny(invalid_reference_casting)]` on by default
[INFO] [stdout]     = note: this error originates in the macro `list_del` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: assigning to `&T` is undefined behavior, consider using an `UnsafeCell`
[INFO] [stdout]    --> src/lib.rs:161:14
[INFO] [stdout]     |
[INFO] [stdout] 161 |               *$entry = ListHead {
[INFO] [stdout]     |  ______________^
[INFO] [stdout] 162 | |                 prev: core::ptr::null_mut(),
[INFO] [stdout] 163 | |                 next: core::ptr::null_mut(),
[INFO] [stdout] 164 | |             };
[INFO] [stdout]     | |_____________^
[INFO] [stdout] ...
[INFO] [stdout] 361 |           list_del!(to_list_head_ptr!(demo1.list_head));
[INFO] [stdout]     |           --------------------------------------------- in this macro invocation
[INFO] [stdout]     |
[INFO] [stdout]     = note: for more information, visit <https://doc.rust-lang.org/book/ch15-05-interior-mutability.html>
[INFO] [stdout]     = note: this error originates in the macro `list_del` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `doubly-linked-list` (lib test) due to 2 previous errors; 1 warning emitted
[INFO] running `Command { std: "docker" "inspect" "848f51e8290552a8f7befded1d257493ea594e6d6f7629f553c0d03a8692fd19", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "848f51e8290552a8f7befded1d257493ea594e6d6f7629f553c0d03a8692fd19", kill_on_drop: false }`
[INFO] [stdout] 848f51e8290552a8f7befded1d257493ea594e6d6f7629f553c0d03a8692fd19
