[INFO] fetching crate nucleo-l011k4-bsp 0.2.0...
[INFO] checking nucleo-l011k4-bsp-0.2.0 against master#cf38b8e663f15db10ce49d7bbce02c99fc3dbc0c for pr-143170
[INFO] extracting crate nucleo-l011k4-bsp 0.2.0 into /workspace/builds/worker-7-tc1/source
[INFO] removed /workspace/builds/worker-7-tc1/source/.cargo/config
[INFO] started tweaking crates.io crate nucleo-l011k4-bsp 0.2.0
[INFO] finished tweaking crates.io crate nucleo-l011k4-bsp 0.2.0
[INFO] tweaked toml for crates.io crate nucleo-l011k4-bsp 0.2.0 written to /workspace/builds/worker-7-tc1/source/Cargo.toml
[INFO] validating manifest of crates.io crate nucleo-l011k4-bsp 0.2.0 on toolchain cf38b8e663f15db10ce49d7bbce02c99fc3dbc0c
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+cf38b8e663f15db10ce49d7bbce02c99fc3dbc0c" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate crates.io crate nucleo-l011k4-bsp 0.2.0 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" "+cf38b8e663f15db10ce49d7bbce02c99fc3dbc0c" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Updating crates.io index
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded volatile-register v0.2.0
[INFO] [stderr]   Downloaded cortex-m v0.6.3
[INFO] [stderr]   Downloaded as-slice v0.1.3
[INFO] [stderr]   Downloaded cortex-m-rt-macros v0.1.8
[INFO] [stderr]   Downloaded vcell v0.1.2
[INFO] [stderr]   Downloaded embedded-hal v1.0.0-alpha.1
[INFO] [stderr]   Downloaded aligned v0.3.4
[INFO] [stderr]   Downloaded cortex-m-rt v0.6.12
[INFO] [stderr]   Downloaded stm32l0 v0.11.0
[INFO] [stderr]   Downloaded stm32l0x1-hal v0.9.0
[INFO] [stderr]   Downloaded flash-embedded-hal v0.1.2
[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@sha256:90999bfc7ae267e83380e433d8e61a7c072ca6729e92edbae886d3423b3a6f4c" "/opt/rustwide/cargo-home/bin/cargo" "+cf38b8e663f15db10ce49d7bbce02c99fc3dbc0c" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 98564ea4b5af269083f81679acadedcc1c269ea97e14e8eac930d63cc9b9749b
[INFO] running `Command { std: "docker" "start" "-a" "98564ea4b5af269083f81679acadedcc1c269ea97e14e8eac930d63cc9b9749b", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "98564ea4b5af269083f81679acadedcc1c269ea97e14e8eac930d63cc9b9749b", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "98564ea4b5af269083f81679acadedcc1c269ea97e14e8eac930d63cc9b9749b", kill_on_drop: false }`
[INFO] [stdout] 98564ea4b5af269083f81679acadedcc1c269ea97e14e8eac930d63cc9b9749b
[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@sha256:90999bfc7ae267e83380e433d8e61a7c072ca6729e92edbae886d3423b3a6f4c" "/opt/rustwide/cargo-home/bin/cargo" "+cf38b8e663f15db10ce49d7bbce02c99fc3dbc0c" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 31c8c919d23f244950b151df3599f8ce95523cf841d93b2670deddd37a57a690
[INFO] running `Command { std: "docker" "start" "-a" "31c8c919d23f244950b151df3599f8ce95523cf841d93b2670deddd37a57a690", kill_on_drop: false }`
[INFO] [stderr]    Compiling typenum v1.12.0
[INFO] [stderr]    Compiling proc-macro2 v1.0.19
[INFO] [stderr]    Compiling syn v1.0.38
[INFO] [stderr]     Checking stable_deref_trait v1.2.0
[INFO] [stderr]    Compiling cortex-m v0.6.3
[INFO] [stderr]     Checking vcell v0.1.2
[INFO] [stderr]    Compiling cortex-m-rt v0.6.12
[INFO] [stderr]     Checking r0 v0.2.2
[INFO] [stderr]     Checking bitfield v0.13.2
[INFO] [stderr]    Compiling stm32l0 v0.11.0
[INFO] [stderr]     Checking nb v1.0.0
[INFO] [stderr]     Checking flash-embedded-hal v0.1.2
[INFO] [stderr]     Checking panic-halt v0.2.0
[INFO] [stderr]    Compiling bare-metal v0.2.5
[INFO] [stderr]    Compiling cast v0.2.3
[INFO] [stderr]     Checking volatile-register v0.2.0
[INFO] [stderr]     Checking nb v0.1.3
[INFO] [stderr]     Checking embedded-hal v1.0.0-alpha.1
[INFO] [stderr]    Compiling quote v1.0.7
[INFO] [stderr]     Checking generic-array v0.13.2
[INFO] [stderr]     Checking generic-array v0.12.3
[INFO] [stderr]     Checking as-slice v0.1.3
[INFO] [stderr]     Checking aligned v0.3.4
[INFO] [stderr]    Compiling cortex-m-rt-macros v0.1.8
[INFO] [stderr]     Checking stm32l0x1-hal v0.9.0
[INFO] [stderr]     Checking nucleo-l011k4-bsp v0.2.0 (/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] warning: unused variable: `vcp_tx`
[INFO] [stdout]   --> src/main.rs:43:14
[INFO] [stdout]    |
[INFO] [stdout] 43 |     let (mut vcp_tx, mut vcp_rx) = board
[INFO] [stdout]    |              ^^^^^^ help: if this is intentional, prefix it with an underscore: `_vcp_tx`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `vcp_rx`
[INFO] [stdout]   --> src/main.rs:43:26
[INFO] [stdout]    |
[INFO] [stdout] 43 |     let (mut vcp_tx, mut vcp_rx) = board
[INFO] [stdout]    |                          ^^^^^^ help: if this is intentional, prefix it with an underscore: `_vcp_rx`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]   --> src/main.rs:43:10
[INFO] [stdout]    |
[INFO] [stdout] 43 |     let (mut vcp_tx, mut vcp_rx) = board
[INFO] [stdout]    |          ----^^^^^^
[INFO] [stdout]    |          |
[INFO] [stdout]    |          help: remove this `mut`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_mut)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]   --> src/main.rs:43:22
[INFO] [stdout]    |
[INFO] [stdout] 43 |     let (mut vcp_tx, mut vcp_rx) = board
[INFO] [stdout]    |                      ----^^^^^^
[INFO] [stdout]    |                      |
[INFO] [stdout]    |                      help: remove this `mut`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `nucleo-l011k4-bsp` (bin "nucleo-l011k4-bsp") due to 1 previous error; 4 warnings emitted
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stdout] error[E0152]: duplicate lang item in crate `std` (which `test` depends on): `panic_impl`
[INFO] [stdout]   |
[INFO] [stdout]   = note: the lang item is first defined in crate `panic_halt` (which `nucleo_l011k4_bsp` depends on)
[INFO] [stdout]   = note: first definition in `panic_halt` loaded from /opt/rustwide/target/debug/deps/libpanic_halt-a712b1dbeab69286.rmeta
[INFO] [stdout]   = note: second definition in `std` loaded from /opt/rustwide/rustup-home/toolchains/cf38b8e663f15db10ce49d7bbce02c99fc3dbc0c/lib/rustlib/x86_64-unknown-linux-gnu/lib/libstd-182371ab76f58e7c.rlib
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0152`.
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `nucleo-l011k4-bsp` (bin "nucleo-l011k4-bsp" test) due to 1 previous error
[INFO] running `Command { std: "docker" "inspect" "31c8c919d23f244950b151df3599f8ce95523cf841d93b2670deddd37a57a690", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "31c8c919d23f244950b151df3599f8ce95523cf841d93b2670deddd37a57a690", kill_on_drop: false }`
[INFO] [stdout] 31c8c919d23f244950b151df3599f8ce95523cf841d93b2670deddd37a57a690