[INFO] fetching crate doubly-linked-list 0.2.0...
[INFO] checking doubly-linked-list-0.2.0 against master#c2f2db79ca3024f68d22b45aa22b570775c2c4ad for pr-124157
[INFO] extracting crate doubly-linked-list 0.2.0 into /workspace/builds/worker-6-tc1/source
[INFO] validating manifest of crates.io crate doubly-linked-list 0.2.0 on toolchain c2f2db79ca3024f68d22b45aa22b570775c2c4ad
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+c2f2db79ca3024f68d22b45aa22b570775c2c4ad" "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-6-tc1/source/Cargo.toml
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+c2f2db79ca3024f68d22b45aa22b570775c2c4ad" "generate-lockfile" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Updating crates.io index
[INFO] [stderr]      Locking 2 packages to latest compatible versions
[INFO] [stderr]       Adding volatile v0.4.6 (latest: v0.5.4)
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+c2f2db79ca3024f68d22b45aa22b570775c2c4ad" "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-6-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-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@sha256:99613afd962a8cfa530ec1899472a458bd015a1ab0af876cf7eb06f6006d81ea" "/opt/rustwide/cargo-home/bin/cargo" "+c2f2db79ca3024f68d22b45aa22b570775c2c4ad" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] fa33d7ca7ebfd2cda29329a952bf36cb16150723ef05f82b2aae6be1b668ded6
[INFO] running `Command { std: "docker" "start" "-a" "fa33d7ca7ebfd2cda29329a952bf36cb16150723ef05f82b2aae6be1b668ded6", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "fa33d7ca7ebfd2cda29329a952bf36cb16150723ef05f82b2aae6be1b668ded6", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "fa33d7ca7ebfd2cda29329a952bf36cb16150723ef05f82b2aae6be1b668ded6", kill_on_drop: false }`
[INFO] [stdout] fa33d7ca7ebfd2cda29329a952bf36cb16150723ef05f82b2aae6be1b668ded6
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-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@sha256:99613afd962a8cfa530ec1899472a458bd015a1ab0af876cf7eb06f6006d81ea" "/opt/rustwide/cargo-home/bin/cargo" "+c2f2db79ca3024f68d22b45aa22b570775c2c4ad" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 840f7ea4eaa732022c5e72f00899146a6afe7946bde39e614b12f076b1d5685c
[INFO] running `Command { std: "docker" "start" "-a" "840f7ea4eaa732022c5e72f00899146a6afe7946bde39e614b12f076b1d5685c", 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] warning: 1 warning emitted
[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] [stdout] error: aborting due to 2 previous errors; 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `doubly-linked-list` (lib test) due to 3 previous errors; 1 warning emitted
[INFO] running `Command { std: "docker" "inspect" "840f7ea4eaa732022c5e72f00899146a6afe7946bde39e614b12f076b1d5685c", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "840f7ea4eaa732022c5e72f00899146a6afe7946bde39e614b12f076b1d5685c", kill_on_drop: false }`
[INFO] [stdout] 840f7ea4eaa732022c5e72f00899146a6afe7946bde39e614b12f076b1d5685c
[INFO] checking doubly-linked-list-0.2.0 against try#9c7b5f5b6b8ec32bbbcf9f07fc0e5208da6c5f88 for pr-124157
[INFO] extracting crate doubly-linked-list 0.2.0 into /workspace/builds/worker-6-tc2/source
[INFO] validating manifest of crates.io crate doubly-linked-list 0.2.0 on toolchain 9c7b5f5b6b8ec32bbbcf9f07fc0e5208da6c5f88
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+9c7b5f5b6b8ec32bbbcf9f07fc0e5208da6c5f88" "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-6-tc2/source/Cargo.toml
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+9c7b5f5b6b8ec32bbbcf9f07fc0e5208da6c5f88" "generate-lockfile" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Updating crates.io index
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]      Locking 2 packages to latest compatible versions
[INFO] [stderr]       Adding volatile v0.4.6 (latest: v0.5.4)
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+9c7b5f5b6b8ec32bbbcf9f07fc0e5208da6c5f88" "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@sha256:99613afd962a8cfa530ec1899472a458bd015a1ab0af876cf7eb06f6006d81ea" "/opt/rustwide/cargo-home/bin/cargo" "+9c7b5f5b6b8ec32bbbcf9f07fc0e5208da6c5f88" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 39486d0bad03713b2eaece4e5e4eb9e2c374b0eb8b7312552769fdacf28a7e77
[INFO] running `Command { std: "docker" "start" "-a" "39486d0bad03713b2eaece4e5e4eb9e2c374b0eb8b7312552769fdacf28a7e77", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "39486d0bad03713b2eaece4e5e4eb9e2c374b0eb8b7312552769fdacf28a7e77", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "39486d0bad03713b2eaece4e5e4eb9e2c374b0eb8b7312552769fdacf28a7e77", kill_on_drop: false }`
[INFO] [stdout] 39486d0bad03713b2eaece4e5e4eb9e2c374b0eb8b7312552769fdacf28a7e77
[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@sha256:99613afd962a8cfa530ec1899472a458bd015a1ab0af876cf7eb06f6006d81ea" "/opt/rustwide/cargo-home/bin/cargo" "+9c7b5f5b6b8ec32bbbcf9f07fc0e5208da6c5f88" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] bcc1f14ad41dcad5e5d784c849f8b9113da58148dc48a32f6e9c3b6b41d8e4be
[INFO] running `Command { std: "docker" "start" "-a" "bcc1f14ad41dcad5e5d784c849f8b9113da58148dc48a32f6e9c3b6b41d8e4be", 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] warning: 1 warning emitted
[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] [stdout] error: aborting due to 2 previous errors; 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `doubly-linked-list` (lib test) due to 3 previous errors; 1 warning emitted
[INFO] running `Command { std: "docker" "inspect" "bcc1f14ad41dcad5e5d784c849f8b9113da58148dc48a32f6e9c3b6b41d8e4be", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "bcc1f14ad41dcad5e5d784c849f8b9113da58148dc48a32f6e9c3b6b41d8e4be", kill_on_drop: false }`
[INFO] [stdout] bcc1f14ad41dcad5e5d784c849f8b9113da58148dc48a32f6e9c3b6b41d8e4be
