[INFO] cloning repository https://github.com/ShivanshuKantPrasad/rost
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/ShivanshuKantPrasad/rost" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FShivanshuKantPrasad%2Frost", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FShivanshuKantPrasad%2Frost'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 1177de2b098840820889072a43b0880ebdfc88b7
[INFO] checking ShivanshuKantPrasad/rost against try#028201683a76a5cd349729c6819c46607119c4e8 for pr-144157
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FShivanshuKantPrasad%2Frost" "/workspace/builds/worker-0-tc2/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-0-tc2/source'...
[INFO] [stderr] done.
[INFO] removed /workspace/builds/worker-0-tc2/source/.cargo/config.toml
[INFO] started tweaking git repo https://github.com/ShivanshuKantPrasad/rost
[INFO] finished tweaking git repo https://github.com/ShivanshuKantPrasad/rost
[INFO] tweaked toml for git repo https://github.com/ShivanshuKantPrasad/rost written to /workspace/builds/worker-0-tc2/source/Cargo.toml
[INFO] validating manifest of git repo https://github.com/ShivanshuKantPrasad/rost on toolchain 028201683a76a5cd349729c6819c46607119c4e8
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+028201683a76a5cd349729c6819c46607119c4e8" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate git repo https://github.com/ShivanshuKantPrasad/rost already has a lockfile, it will not be regenerated
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+028201683a76a5cd349729c6819c46607119c4e8" "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-0-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-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:cf8efcab8866f2cf4285301c7418e2f4f2a9b088c91ba69c40d5b659f81557f7" "/opt/rustwide/cargo-home/bin/cargo" "+028201683a76a5cd349729c6819c46607119c4e8" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] f60dcc7cd7b2c766e77ece83f0ba04f57284bdf373749b4908374a54ae572f38
[INFO] running `Command { std: "docker" "start" "-a" "f60dcc7cd7b2c766e77ece83f0ba04f57284bdf373749b4908374a54ae572f38", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "f60dcc7cd7b2c766e77ece83f0ba04f57284bdf373749b4908374a54ae572f38", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "f60dcc7cd7b2c766e77ece83f0ba04f57284bdf373749b4908374a54ae572f38", kill_on_drop: false }`
[INFO] [stdout] f60dcc7cd7b2c766e77ece83f0ba04f57284bdf373749b4908374a54ae572f38
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-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:cf8efcab8866f2cf4285301c7418e2f4f2a9b088c91ba69c40d5b659f81557f7" "/opt/rustwide/cargo-home/bin/cargo" "+028201683a76a5cd349729c6819c46607119c4e8" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] caf0355fa74b3908a6d4bdb229fdacb8426c70f402c8b52781cc8506911fc167
[INFO] running `Command { std: "docker" "start" "-a" "caf0355fa74b3908a6d4bdb229fdacb8426c70f402c8b52781cc8506911fc167", kill_on_drop: false }`
[INFO] [stderr]    Compiling bootloader v0.9.29
[INFO] [stderr]     Checking rost v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] error: unwinding panics are not supported without std
[INFO] [stdout]   |
[INFO] [stdout]   = help: using nightly cargo, use -Zbuild-std with panic="abort" to avoid unwinding
[INFO] [stdout]   = note: since the core library is usually precompiled with panic="unwind", rebuilding your crate with panic="abort" may not be enough to fix the problem
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0152]: found duplicate lang item `panic_impl`
[INFO] [stdout]   --> src/main.rs:24:1
[INFO] [stdout]    |
[INFO] [stdout] 24 | / fn panic(_info: &PanicInfo) -> ! {
[INFO] [stdout] 25 | |     loop {}
[INFO] [stdout] 26 | | }
[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/028201683a76a5cd349729c6819c46607119c4e8/lib/rustlib/x86_64-unknown-linux-gnu/lib/libstd-54e42b35ab65fe3c.rlib
[INFO] [stdout]    = note: second definition in the local crate (`rost`)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `rost` (bin "rost") due to 1 previous error
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stdout] For more information about this error, try `rustc --explain E0152`.
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `rost` (bin "rost" test) due to 1 previous error
[INFO] running `Command { std: "docker" "inspect" "caf0355fa74b3908a6d4bdb229fdacb8426c70f402c8b52781cc8506911fc167", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "caf0355fa74b3908a6d4bdb229fdacb8426c70f402c8b52781cc8506911fc167", kill_on_drop: false }`
[INFO] [stdout] caf0355fa74b3908a6d4bdb229fdacb8426c70f402c8b52781cc8506911fc167