[INFO] fetching crate panic-never 0.1.0...
[INFO] testing panic-never-0.1.0 against master#a77da2d454e6caa227a85b16410b95f93495e7e0 for pr-91031
[INFO] extracting crate panic-never 0.1.0 into /workspace/builds/worker-78/source
[INFO] validating manifest of crates.io crate panic-never 0.1.0 on toolchain a77da2d454e6caa227a85b16410b95f93495e7e0
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+a77da2d454e6caa227a85b16410b95f93495e7e0" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate panic-never 0.1.0
[INFO] finished tweaking crates.io crate panic-never 0.1.0
[INFO] tweaked toml for crates.io crate panic-never 0.1.0 written to /workspace/builds/worker-78/source/Cargo.toml
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+a77da2d454e6caa227a85b16410b95f93495e7e0" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+a77da2d454e6caa227a85b16410b95f93495e7e0" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-78/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-78/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@sha256:5736fa189c1c60b01babf4b8b698fe57b6ecc41933a7ff2e0b8d7a221459412b" "/opt/rustwide/cargo-home/bin/cargo" "+a77da2d454e6caa227a85b16410b95f93495e7e0" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] c168db570ec7398431c3a3452f4a893c282541e18d05fe0072caed7008694640
[INFO] running `Command { std: "docker" "start" "-a" "c168db570ec7398431c3a3452f4a893c282541e18d05fe0072caed7008694640", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "c168db570ec7398431c3a3452f4a893c282541e18d05fe0072caed7008694640", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "c168db570ec7398431c3a3452f4a893c282541e18d05fe0072caed7008694640", kill_on_drop: false }`
[INFO] [stdout] c168db570ec7398431c3a3452f4a893c282541e18d05fe0072caed7008694640
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-78/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-78/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" "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@sha256:5736fa189c1c60b01babf4b8b698fe57b6ecc41933a7ff2e0b8d7a221459412b" "/opt/rustwide/cargo-home/bin/cargo" "+a77da2d454e6caa227a85b16410b95f93495e7e0" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 67a191155ff48ae80e44a5d9030b733a96a6de346707f8c827b067573f9e569b
[INFO] running `Command { std: "docker" "start" "-a" "67a191155ff48ae80e44a5d9030b733a96a6de346707f8c827b067573f9e569b", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]    Compiling panic-never v0.1.0 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.55s
[INFO] running `Command { std: "docker" "inspect" "67a191155ff48ae80e44a5d9030b733a96a6de346707f8c827b067573f9e569b", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "67a191155ff48ae80e44a5d9030b733a96a6de346707f8c827b067573f9e569b", kill_on_drop: false }`
[INFO] [stdout] 67a191155ff48ae80e44a5d9030b733a96a6de346707f8c827b067573f9e569b
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-78/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-78/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" "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@sha256:5736fa189c1c60b01babf4b8b698fe57b6ecc41933a7ff2e0b8d7a221459412b" "/opt/rustwide/cargo-home/bin/cargo" "+a77da2d454e6caa227a85b16410b95f93495e7e0" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] b4ab81466fe3a5ea153d163b4524249e6f08d21d20cacd494b636c38e0da55d3
[INFO] running `Command { std: "docker" "start" "-a" "b4ab81466fe3a5ea153d163b4524249e6f08d21d20cacd494b636c38e0da55d3", kill_on_drop: false }`
[INFO] [stderr]    Compiling panic-never v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] error[E0152]: found duplicate lang item `panic_impl`
[INFO] [stdout]   --> src/lib.rs:48:1
[INFO] [stdout]    |
[INFO] [stdout] 48 | fn panic(_: &PanicInfo<'_>) -> ! {
[INFO] [stdout]    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: the lang item is first defined in crate `std` (which `test` depends on)
[INFO] [stdout]    = note: first definition in `std` loaded from /opt/rustwide/rustup-home/toolchains/a77da2d454e6caa227a85b16410b95f93495e7e0/lib/rustlib/x86_64-unknown-linux-gnu/lib/libstd-29e5e596e889a0aa.so, /opt/rustwide/rustup-home/toolchains/a77da2d454e6caa227a85b16410b95f93495e7e0/lib/rustlib/x86_64-unknown-linux-gnu/lib/libstd-29e5e596e889a0aa.rlib
[INFO] [stdout]    = note: second definition in the local crate (`panic_never`)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to previous error
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0152`.
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `panic-never` due to 2 previous errors
[INFO] running `Command { std: "docker" "inspect" "b4ab81466fe3a5ea153d163b4524249e6f08d21d20cacd494b636c38e0da55d3", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "b4ab81466fe3a5ea153d163b4524249e6f08d21d20cacd494b636c38e0da55d3", kill_on_drop: false }`
[INFO] [stdout] b4ab81466fe3a5ea153d163b4524249e6f08d21d20cacd494b636c38e0da55d3