[INFO] cloning repository https://github.com/oppsJennfer/group23-quadrupel
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/oppsJennfer/group23-quadrupel" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FoppsJennfer%2Fgroup23-quadrupel", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FoppsJennfer%2Fgroup23-quadrupel'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 8fd05082639b78ca6168b0929b70f0562a74415b
[INFO] checking oppsJennfer/group23-quadrupel/8fd05082639b78ca6168b0929b70f0562a74415b against master#518b428304e0008859cb1fd81d1ac20efb2a064a for pr-138961-1
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FoppsJennfer%2Fgroup23-quadrupel" "/workspace/builds/worker-7-tc1/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-7-tc1/source'...
[INFO] [stderr] done.
[INFO] removed /workspace/builds/worker-7-tc1/source/rust-toolchain.toml
[INFO] started tweaking git repo https://github.com/oppsJennfer/group23-quadrupel
[INFO] finished tweaking git repo https://github.com/oppsJennfer/group23-quadrupel
[INFO] tweaked toml for git repo https://github.com/oppsJennfer/group23-quadrupel written to /workspace/builds/worker-7-tc1/source/Cargo.toml
[INFO] validating manifest of git repo https://github.com/oppsJennfer/group23-quadrupel on toolchain 518b428304e0008859cb1fd81d1ac20efb2a064a
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+518b428304e0008859cb1fd81d1ac20efb2a064a" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate git repo https://github.com/oppsJennfer/group23-quadrupel 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" "+518b428304e0008859cb1fd81d1ac20efb2a064a" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Updating crates.io index
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded linked_list_allocator v0.10.5
[INFO] [stderr]   Downloaded embedded-storage v0.3.0
[INFO] [stderr]   Downloaded alloc-cortex-m v0.4.4
[INFO] [stderr]   Downloaded nrf51-pac v0.12.2
[INFO] [stderr]   Downloaded nrf-hal-common v0.16.0
[INFO] [stderr]   Downloaded ringbuffer v0.12.0
[INFO] [stderr]   Downloaded nrf51-hal v0.16.0
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-tc1/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@sha256:4848fb76d95f26979359cc7e45710b1dbc8f3acb7aeedee7c460d7702230f228" "/opt/rustwide/cargo-home/bin/cargo" "+518b428304e0008859cb1fd81d1ac20efb2a064a" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 4c93fa8b770ef5824e594851cb086694d3156aff5e9de62790238700cf221514
[INFO] running `Command { std: "docker" "start" "-a" "4c93fa8b770ef5824e594851cb086694d3156aff5e9de62790238700cf221514", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "4c93fa8b770ef5824e594851cb086694d3156aff5e9de62790238700cf221514", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "4c93fa8b770ef5824e594851cb086694d3156aff5e9de62790238700cf221514", kill_on_drop: false }`
[INFO] [stdout] 4c93fa8b770ef5824e594851cb086694d3156aff5e9de62790238700cf221514
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-tc1/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@sha256:4848fb76d95f26979359cc7e45710b1dbc8f3acb7aeedee7c460d7702230f228" "/opt/rustwide/cargo-home/bin/cargo" "+518b428304e0008859cb1fd81d1ac20efb2a064a" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 57b598e05caae7482b9164cd1f0e180311e9332813b7770d8b4f71a5d7c8e656
[INFO] running `Command { std: "docker" "start" "-a" "57b598e05caae7482b9164cd1f0e180311e9332813b7770d8b4f71a5d7c8e656", kill_on_drop: false }`
[INFO] [stderr]    Compiling cortex-m v0.7.7
[INFO] [stderr]     Checking nb v1.1.0
[INFO] [stderr]     Checking vcell v0.1.3
[INFO] [stderr]    Compiling cortex-m-rt v0.7.3
[INFO] [stderr]    Compiling az v1.2.1
[INFO] [stderr]     Checking bitfield v0.13.2
[INFO] [stderr]    Compiling nrf51-pac v0.12.2
[INFO] [stderr]    Compiling fixed v1.23.1
[INFO] [stderr]    Compiling typenum v1.16.0
[INFO] [stderr]     Checking half v2.2.1
[INFO] [stderr]     Checking bytemuck v1.13.1
[INFO] [stderr]    Compiling nrf-hal-common v0.16.0
[INFO] [stderr]    Compiling proc-macro2 v1.0.54
[INFO] [stderr]    Compiling bare-metal v0.2.5
[INFO] [stderr]     Checking embedded-dma v0.2.0
[INFO] [stderr]    Compiling nrf51-hal v0.16.0
[INFO] [stderr]     Checking nb v0.1.3
[INFO] [stderr]     Checking volatile-register v0.2.1
[INFO] [stderr]     Checking embedded-storage v0.3.0
[INFO] [stderr]     Checking linked_list_allocator v0.10.5
[INFO] [stderr]     Checking ringbuffer v0.12.0
[INFO] [stdout] error[E0635]: unknown feature `proc_macro_span_shrink`
[INFO] [stdout]   --> /opt/rustwide/cargo-home/registry/src/index.crates.io-1949cf8c6b5b557f/proc-macro2-1.0.54/src/lib.rs:92:30
[INFO] [stdout]    |
[INFO] [stdout] 92 |     feature(proc_macro_span, proc_macro_span_shrink)
[INFO] [stdout]    |                              ^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Checking embedded-hal v0.2.7
[INFO] [stdout] For more information about this error, try `rustc --explain E0635`.
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `proc-macro2` (lib) due to 1 previous error
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] running `Command { std: "docker" "inspect" "57b598e05caae7482b9164cd1f0e180311e9332813b7770d8b4f71a5d7c8e656", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "57b598e05caae7482b9164cd1f0e180311e9332813b7770d8b4f71a5d7c8e656", kill_on_drop: false }`
[INFO] [stdout] 57b598e05caae7482b9164cd1f0e180311e9332813b7770d8b4f71a5d7c8e656