[INFO] cloning repository https://github.com/SimonSapin/rust-on-bbc-microbit
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/SimonSapin/rust-on-bbc-microbit" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FSimonSapin%2Frust-on-bbc-microbit", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FSimonSapin%2Frust-on-bbc-microbit'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 78c18b0c62cf695cea804735e74d29caee557b6a
[INFO] testing SimonSapin/rust-on-bbc-microbit against master#62efba8a050c64249dab942951bb28f710208bc8 for pr-90799
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FSimonSapin%2Frust-on-bbc-microbit" "/workspace/builds/worker-113/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-113/source'...
[INFO] [stderr] done.
[INFO] [stderr] Updating files:  91% (21/23)
Updating files:  95% (22/23)
Updating files: 100% (23/23)
Updating files: 100% (23/23), done.
[INFO] validating manifest of git repo https://github.com/SimonSapin/rust-on-bbc-microbit on toolchain 62efba8a050c64249dab942951bb28f710208bc8
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+62efba8a050c64249dab942951bb28f710208bc8" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/SimonSapin/rust-on-bbc-microbit
[INFO] finished tweaking git repo https://github.com/SimonSapin/rust-on-bbc-microbit
[INFO] tweaked toml for git repo https://github.com/SimonSapin/rust-on-bbc-microbit written to /workspace/builds/worker-113/source/Cargo.toml
[INFO] crate git repo https://github.com/SimonSapin/rust-on-bbc-microbit already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+62efba8a050c64249dab942951bb28f710208bc8" "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-113/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-113/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:e8397a04204aaf8b9f284182a6f9e27a3c2e67044d0943b4415b160bfc957681" "/opt/rustwide/cargo-home/bin/cargo" "+62efba8a050c64249dab942951bb28f710208bc8" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] a81350f025fda81f91741b8d1a489eb013b472b877190a41c51ccd3a85f630c4
[INFO] running `Command { std: "docker" "start" "-a" "a81350f025fda81f91741b8d1a489eb013b472b877190a41c51ccd3a85f630c4", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "a81350f025fda81f91741b8d1a489eb013b472b877190a41c51ccd3a85f630c4", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "a81350f025fda81f91741b8d1a489eb013b472b877190a41c51ccd3a85f630c4", kill_on_drop: false }`
[INFO] [stdout] a81350f025fda81f91741b8d1a489eb013b472b877190a41c51ccd3a85f630c4
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-113/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-113/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:e8397a04204aaf8b9f284182a6f9e27a3c2e67044d0943b4415b160bfc957681" "/opt/rustwide/cargo-home/bin/cargo" "+62efba8a050c64249dab942951bb28f710208bc8" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] f4e3320ef0c334f2028f724ae8d82207449ebfe1f513a2c69217b701ea5ca108
[INFO] running `Command { std: "docker" "start" "-a" "f4e3320ef0c334f2028f724ae8d82207449ebfe1f513a2c69217b701ea5ca108", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]    Compiling rust-on-bbc-microbit v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] error: the legacy LLVM-style asm! syntax is no longer supported
[INFO] [stdout]   --> src/busy_loop.rs:16:14
[INFO] [stdout]    |
[INFO] [stdout] 16 |     unsafe { asm!("" : : "r"(&dummy)) }
[INFO] [stdout]    |              ----^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |              |
[INFO] [stdout]    |              help: replace with: `llvm_asm!`
[INFO] [stdout]    |
[INFO] [stdout]    = note: consider migrating to the new asm! syntax specified in RFC 2873
[INFO] [stdout]    = note: alternatively, switch to llvm_asm! to keep your code working as it is
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0152]: found duplicate lang item `panic_fmt`
[INFO] [stdout]   --> src/lib.rs:30:1
[INFO] [stdout]    |
[INFO] [stdout] 30 | extern fn panic_fmt(details: ::core::fmt::Arguments, file: &'static str, line: u32) -> ! {
[INFO] [stdout]    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: the lang item is first defined in crate `core` (which `rust_on_bbc_microbit` depends on)
[INFO] [stdout]    = note: first definition in `core` loaded from /opt/rustwide/rustup-home/toolchains/62efba8a050c64249dab942951bb28f710208bc8/lib/rustlib/x86_64-unknown-linux-gnu/lib/libcore-0e3656b1fda5fd7b.rlib
[INFO] [stdout]    = note: second definition in the local crate (`rust_on_bbc_microbit`)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: `#[panic_handler]` function required, but not found
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to 3 previous errors
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0152`.
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `rust-on-bbc-microbit` due to 4 previous errors
[INFO] running `Command { std: "docker" "inspect" "f4e3320ef0c334f2028f724ae8d82207449ebfe1f513a2c69217b701ea5ca108", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "f4e3320ef0c334f2028f724ae8d82207449ebfe1f513a2c69217b701ea5ca108", kill_on_drop: false }`
[INFO] [stdout] f4e3320ef0c334f2028f724ae8d82207449ebfe1f513a2c69217b701ea5ca108