[INFO] updating cached repository https://github.com/rofrol/microbit-blinky
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "-c" "remote.origin.fetch=refs/heads/*:refs/heads/*" "fetch" "origin" "--force" "--prune", kill_on_drop: false }`
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] ee3b309203ae21192d6f7ae6805baa3a2d88910a
[INFO] documenting rofrol/microbit-blinky against try#66dfc4e010913fbed0c4ea91fc2c010004b0f441 for pr-73566
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Frofrol%2Fmicrobit-blinky" "/workspace/builds/worker-6/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-6/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/rofrol/microbit-blinky on toolchain 66dfc4e010913fbed0c4ea91fc2c010004b0f441
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+66dfc4e010913fbed0c4ea91fc2c010004b0f441" "read-manifest" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] removed /workspace/builds/worker-6/source/.cargo/config
[INFO] started tweaking git repo https://github.com/rofrol/microbit-blinky
[INFO] finished tweaking git repo https://github.com/rofrol/microbit-blinky
[INFO] tweaked toml for git repo https://github.com/rofrol/microbit-blinky written to /workspace/builds/worker-6/source/Cargo.toml
[INFO] crate git repo https://github.com/rofrol/microbit-blinky already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+66dfc4e010913fbed0c4ea91fc2c010004b0f441" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[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" "MAP_USER_ID=0" "-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" "--network" "none" "rustops/crates-build-env@sha256:819119df93c0f5eca3f29186f14981ef29945a311854d7222af07488600a2584" "/opt/rustwide/cargo-home/bin/cargo" "+66dfc4e010913fbed0c4ea91fc2c010004b0f441" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] af99e91ac9655bd7ccb32d0ef7a4d394c68b0a4b14b35050ce4d9a8d61a8eff1
[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" "af99e91ac9655bd7ccb32d0ef7a4d394c68b0a4b14b35050ce4d9a8d61a8eff1", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "af99e91ac9655bd7ccb32d0ef7a4d394c68b0a4b14b35050ce4d9a8d61a8eff1", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "af99e91ac9655bd7ccb32d0ef7a4d394c68b0a4b14b35050ce4d9a8d61a8eff1", kill_on_drop: false }`
[INFO] [stdout] af99e91ac9655bd7ccb32d0ef7a4d394c68b0a4b14b35050ce4d9a8d61a8eff1
[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" "MAP_USER_ID=0" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-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" "--network" "none" "rustops/crates-build-env@sha256:819119df93c0f5eca3f29186f14981ef29945a311854d7222af07488600a2584" "/opt/rustwide/cargo-home/bin/cargo" "+66dfc4e010913fbed0c4ea91fc2c010004b0f441" "doc" "--frozen" "--no-deps" "--document-private-items" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] f225eb79bc66f0707af657b4c952e1e9c8143b7ef5ffee5e0b968e6fff15852a
[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" "f225eb79bc66f0707af657b4c952e1e9c8143b7ef5ffee5e0b968e6fff15852a", kill_on_drop: false }`
[INFO] [stderr]    Compiling cortex-m v0.6.1
[INFO] [stderr]    Compiling proc-macro2 v1.0.6
[INFO] [stderr]    Compiling unicode-xid v0.2.0
[INFO] [stderr]    Compiling syn v1.0.11
[INFO] [stderr]    Compiling cortex-m-rt v0.6.11
[INFO] [stderr]    Compiling nrf51 v0.7.0
[INFO] [stderr]    Compiling fpa v0.1.0
[INFO] [stderr]    Compiling microbit v0.8.0
[INFO] [stderr]     Checking embedded-hal v0.2.3
[INFO] [stderr]    Compiling bare-metal v0.2.5
[INFO] [stderr]    Compiling cast v0.2.3
[INFO] [stderr]     Checking generic-array v0.13.2
[INFO] [stderr]    Compiling cortex-m-semihosting v0.3.5
[INFO] [stderr]     Checking as-slice v0.1.2
[INFO] [stderr]    Compiling quote v1.0.2
[INFO] [stderr]     Checking aligned v0.3.2
[INFO] [stderr]     Checking panic-semihosting v0.5.3
[INFO] [stderr]    Compiling cortex-m-rt-macros v0.1.7
[INFO] [stderr]     Checking nrf51-hal v0.7.1
[INFO] [stderr]  Documenting microrust-start v1.0.0 (/opt/rustwide/workdir)
[INFO] [stdout] error: duplicate lang item in crate `panic_halt` (which `microrust_start` depends on): `panic_impl`.
[INFO] [stdout]   |
[INFO] [stdout]   = note: the lang item is first defined in crate `panic_semihosting` (which `microrust_start` depends on)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to previous error
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr] error: Could not document `microrust-start`.
[INFO] [stderr] 
[INFO] [stderr] Caused by:
[INFO] [stderr]   process didn't exit successfully: `rustdoc --edition=2018 --crate-type bin --crate-name microrust_start src/main.rs -o /opt/rustwide/target/doc --error-format=json --json=diagnostic-rendered-ansi --document-private-items -L dependency=/opt/rustwide/target/debug/deps --extern cortex_m_rt=/opt/rustwide/target/debug/deps/libcortex_m_rt-2e83d8981beb9245.rmeta --extern cortex_m_semihosting=/opt/rustwide/target/debug/deps/libcortex_m_semihosting-e1b5a970de6acc62.rmeta --extern microbit=/opt/rustwide/target/debug/deps/libmicrobit-d8827274caa2a9e7.rmeta --extern panic_halt=/opt/rustwide/target/debug/deps/libpanic_halt-5cb144f9267ebca2.rmeta --extern panic_semihosting=/opt/rustwide/target/debug/deps/libpanic_semihosting-f0d67806e651e3f9.rmeta --cap-lints=forbid` (exit code: 1)
[INFO] running `Command { std: "docker" "inspect" "f225eb79bc66f0707af657b4c952e1e9c8143b7ef5ffee5e0b968e6fff15852a", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "f225eb79bc66f0707af657b4c952e1e9c8143b7ef5ffee5e0b968e6fff15852a", kill_on_drop: false }`
[INFO] [stdout] f225eb79bc66f0707af657b4c952e1e9c8143b7ef5ffee5e0b968e6fff15852a