[INFO] fetching crate panic-never 0.1.0...
[INFO] checking panic-never-0.1.0 against master#db1fb85cff63ad5fffe435e17128f99f9e1d970c for pr-89056
[INFO] extracting crate panic-never 0.1.0 into /workspace/builds/worker-28/source
[INFO] validating manifest of crates.io crate panic-never 0.1.0 on toolchain db1fb85cff63ad5fffe435e17128f99f9e1d970c
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+db1fb85cff63ad5fffe435e17128f99f9e1d970c" "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-28/source/Cargo.toml
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+db1fb85cff63ad5fffe435e17128f99f9e1d970c" "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" "+db1fb85cff63ad5fffe435e17128f99f9e1d970c" "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-28/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-28/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:a89201d6b5b9fd45c15d5952ece0a0129e7e80cb26ec023fd59cf09bc26f1604" "/opt/rustwide/cargo-home/bin/cargo" "+db1fb85cff63ad5fffe435e17128f99f9e1d970c" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 5bc0e2941ac94d174c98f6eb7b3b6fe3f1e58ad26e6a64b297eeb29c8a0909d9
[INFO] running `Command { std: "docker" "start" "-a" "5bc0e2941ac94d174c98f6eb7b3b6fe3f1e58ad26e6a64b297eeb29c8a0909d9", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "5bc0e2941ac94d174c98f6eb7b3b6fe3f1e58ad26e6a64b297eeb29c8a0909d9", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "5bc0e2941ac94d174c98f6eb7b3b6fe3f1e58ad26e6a64b297eeb29c8a0909d9", kill_on_drop: false }`
[INFO] [stdout] 5bc0e2941ac94d174c98f6eb7b3b6fe3f1e58ad26e6a64b297eeb29c8a0909d9
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-28/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-28/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:a89201d6b5b9fd45c15d5952ece0a0129e7e80cb26ec023fd59cf09bc26f1604" "/opt/rustwide/cargo-home/bin/cargo" "+db1fb85cff63ad5fffe435e17128f99f9e1d970c" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] b7d8f5c1b11eba7c7fe8e06e1f7f7079fed7fa83e348fd1404afbcc086045329
[INFO] running `Command { std: "docker" "start" "-a" "b7d8f5c1b11eba7c7fe8e06e1f7f7079fed7fa83e348fd1404afbcc086045329", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Checking 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/db1fb85cff63ad5fffe435e17128f99f9e1d970c/lib/rustlib/x86_64-unknown-linux-gnu/lib/libstd-d6566390077dd5f5.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" "b7d8f5c1b11eba7c7fe8e06e1f7f7079fed7fa83e348fd1404afbcc086045329", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "b7d8f5c1b11eba7c7fe8e06e1f7f7079fed7fa83e348fd1404afbcc086045329", kill_on_drop: false }`
[INFO] [stdout] b7d8f5c1b11eba7c7fe8e06e1f7f7079fed7fa83e348fd1404afbcc086045329