[INFO] fetching crate panic-semihosting 0.5.3...
[INFO] checking panic-semihosting-0.5.3 against master#7b3a7819371cef92a187e9bac8f7810ccde15216 for pr-74846
[INFO] extracting crate panic-semihosting 0.5.3 into /workspace/builds/worker-6/source
[INFO] validating manifest of crates.io crate panic-semihosting 0.5.3 on toolchain 7b3a7819371cef92a187e9bac8f7810ccde15216
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+7b3a7819371cef92a187e9bac8f7810ccde15216" "read-manifest" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] started tweaking crates.io crate panic-semihosting 0.5.3
[INFO] finished tweaking crates.io crate panic-semihosting 0.5.3
[INFO] tweaked toml for crates.io crate panic-semihosting 0.5.3 written to /workspace/builds/worker-6/source/Cargo.toml
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+7b3a7819371cef92a187e9bac8f7810ccde15216" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update", kill_on_drop: false }`
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+7b3a7819371cef92a187e9bac8f7810ccde15216" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6/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" "rustops/crates-build-env@sha256:a636fd89d022f18117e1dc8fb37a0a009933cdbbe082814857f0e2024962d47c" "/opt/rustwide/cargo-home/bin/cargo" "+7b3a7819371cef92a187e9bac8f7810ccde15216" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 07e899aa09ebad55c6724acb05c71d7ba7143abd0b3631f8a16f45859ee0857c
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] running `Command { std: "docker" "start" "-a" "07e899aa09ebad55c6724acb05c71d7ba7143abd0b3631f8a16f45859ee0857c", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "07e899aa09ebad55c6724acb05c71d7ba7143abd0b3631f8a16f45859ee0857c", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "07e899aa09ebad55c6724acb05c71d7ba7143abd0b3631f8a16f45859ee0857c", kill_on_drop: false }`
[INFO] [stdout] 07e899aa09ebad55c6724acb05c71d7ba7143abd0b3631f8a16f45859ee0857c
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6/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" "rustops/crates-build-env@sha256:a636fd89d022f18117e1dc8fb37a0a009933cdbbe082814857f0e2024962d47c" "/opt/rustwide/cargo-home/bin/cargo" "+7b3a7819371cef92a187e9bac8f7810ccde15216" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 5516ce1c872da8f81266c6e5a2145409b4b58cb3f50f9d9d394ce3eb461cbb37
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] running `Command { std: "docker" "start" "-a" "5516ce1c872da8f81266c6e5a2145409b4b58cb3f50f9d9d394ce3eb461cbb37", kill_on_drop: false }`
[INFO] [stderr]    Compiling cortex-m-semihosting v0.3.5
[INFO] [stderr]     Checking panic-semihosting v0.5.3 (/opt/rustwide/workdir)
[INFO] [stdout] error[E0152]: found duplicate lang item `panic_impl`
[INFO] [stdout]   --> src/lib.rs:77:1
[INFO] [stdout]    |
[INFO] [stdout] 77 | / fn panic(info: &PanicInfo) -> ! {
[INFO] [stdout] 78 | |     interrupt::disable();
[INFO] [stdout] 79 | |
[INFO] [stdout] 80 | |     if let Ok(mut hstdout) = hio::hstdout() {
[INFO] [stdout] ...  |
[INFO] [stdout] 94 | |     loop {}
[INFO] [stdout] 95 | | }
[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/7b3a7819371cef92a187e9bac8f7810ccde15216/lib/rustlib/x86_64-unknown-linux-gnu/lib/libstd-843c4381784de358.rlib
[INFO] [stdout]    = note: second definition in the local crate (`panic_semihosting`)
[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-semihosting`.
[INFO] [stderr] 
[INFO] [stderr] To learn more, run the command again with --verbose.
[INFO] running `Command { std: "docker" "inspect" "5516ce1c872da8f81266c6e5a2145409b4b58cb3f50f9d9d394ce3eb461cbb37", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "5516ce1c872da8f81266c6e5a2145409b4b58cb3f50f9d9d394ce3eb461cbb37", kill_on_drop: false }`
[INFO] [stdout] 5516ce1c872da8f81266c6e5a2145409b4b58cb3f50f9d9d394ce3eb461cbb37