[INFO] fetching crate drone-cortexm 0.13.0...
[INFO] checking drone-cortexm-0.13.0 against try#b2f80f6008cdafc35b4472bd46afa16cc6b0cd63 for pr-79470
[INFO] extracting crate drone-cortexm 0.13.0 into /workspace/builds/worker-4/source
[INFO] validating manifest of crates.io crate drone-cortexm 0.13.0 on toolchain b2f80f6008cdafc35b4472bd46afa16cc6b0cd63
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+b2f80f6008cdafc35b4472bd46afa16cc6b0cd63" "read-manifest" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] started tweaking crates.io crate drone-cortexm 0.13.0
[INFO] finished tweaking crates.io crate drone-cortexm 0.13.0
[INFO] tweaked toml for crates.io crate drone-cortexm 0.13.0 written to /workspace/builds/worker-4/source/Cargo.toml
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+b2f80f6008cdafc35b4472bd46afa16cc6b0cd63" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update", kill_on_drop: false }`
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+b2f80f6008cdafc35b4472bd46afa16cc6b0cd63" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/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:c8ac004eab7d63a0ad09a2dde3d3353ba464f767bee4de425dc8f74c46a1905e" "/opt/rustwide/cargo-home/bin/cargo" "+b2f80f6008cdafc35b4472bd46afa16cc6b0cd63" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] ea1792c68301caa068fb94f45b744b4eca3e7cc620f987830d1b5ce73469340b
[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" "ea1792c68301caa068fb94f45b744b4eca3e7cc620f987830d1b5ce73469340b", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "ea1792c68301caa068fb94f45b744b4eca3e7cc620f987830d1b5ce73469340b", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "ea1792c68301caa068fb94f45b744b4eca3e7cc620f987830d1b5ce73469340b", kill_on_drop: false }`
[INFO] [stdout] ea1792c68301caa068fb94f45b744b4eca3e7cc620f987830d1b5ce73469340b
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/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:c8ac004eab7d63a0ad09a2dde3d3353ba464f767bee4de425dc8f74c46a1905e" "/opt/rustwide/cargo-home/bin/cargo" "+b2f80f6008cdafc35b4472bd46afa16cc6b0cd63" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 955773b630cf922a1b5245a4a87a71c538586cbbb4304200da9d903c87bb6936
[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" "955773b630cf922a1b5245a4a87a71c538586cbbb4304200da9d903c87bb6936", kill_on_drop: false }`
[INFO] [stderr]    Compiling syn v1.0.54
[INFO] [stderr]    Compiling proc-macro-hack v0.5.19
[INFO] [stderr]    Compiling serde v1.0.118
[INFO] [stderr]    Compiling proc-macro-nested v0.1.6
[INFO] [stderr]    Compiling anyhow v1.0.35
[INFO] [stderr]     Checking futures-core v0.3.8
[INFO] [stderr]     Checking futures-sink v0.3.8
[INFO] [stderr]     Checking futures-task v0.3.8
[INFO] [stderr]     Checking pin-utils v0.1.0
[INFO] [stderr]     Checking futures-io v0.3.8
[INFO] [stderr]    Compiling if_chain v1.0.1
[INFO] [stderr]     Checking futures-channel v0.3.8
[INFO] [stderr]    Compiling drone-macros-core v0.13.0
[INFO] [stderr]    Compiling serde_derive v1.0.118
[INFO] [stderr]    Compiling pin-project-internal v1.0.2
[INFO] [stderr]    Compiling futures-macro v0.3.8
[INFO] [stderr]    Compiling drone-cortexm-macros v0.13.0
[INFO] [stderr]     Checking pin-project v1.0.2
[INFO] [stderr]     Checking futures-util v0.3.8
[INFO] [stderr]     Checking futures v0.3.8
[INFO] [stderr]    Compiling toml v0.5.7
[INFO] [stderr]    Compiling drone-config v0.13.1
[INFO] [stderr]    Compiling drone-core-macros v0.13.0
[INFO] [stderr]     Checking drone-core v0.13.0
[INFO] [stderr]     Checking drone-cortexm v0.13.0 (/opt/rustwide/workdir)
[INFO] [stdout] error: 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 `drone_core` (which `drone_cortexm` depends on)
[INFO] [stdout]   = note: first definition in `drone_core` loaded from /opt/rustwide/target/debug/deps/libdrone_core-ba19b1d0c25173bd.rmeta
[INFO] [stdout]   = note: second definition in `std` loaded from /opt/rustwide/rustup-home/toolchains/b2f80f6008cdafc35b4472bd46afa16cc6b0cd63/lib/rustlib/x86_64-unknown-linux-gnu/lib/libstd-25c6acf8063a3802.rlib
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: duplicate lang item in crate `std` (which `test` depends on): `oom`.
[INFO] [stdout]   |
[INFO] [stdout]   = note: the lang item is first defined in crate `drone_core` (which `drone_cortexm` depends on)
[INFO] [stdout]   = note: first definition in `drone_core` loaded from /opt/rustwide/target/debug/deps/libdrone_core-ba19b1d0c25173bd.rmeta
[INFO] [stdout]   = note: second definition in `std` loaded from /opt/rustwide/rustup-home/toolchains/b2f80f6008cdafc35b4472bd46afa16cc6b0cd63/lib/rustlib/x86_64-unknown-linux-gnu/lib/libstd-25c6acf8063a3802.rlib
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to 2 previous errors
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `drone-cortexm`
[INFO] [stderr] 
[INFO] [stderr] To learn more, run the command again with --verbose.
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stdout] warning: the feature `never_type` has been stable since 1.49.0 and no longer requires an attribute to enable
[INFO] [stdout]   --> src/lib.rs:53:12
[INFO] [stdout]    |
[INFO] [stdout] 53 | #![feature(never_type)]
[INFO] [stdout]    |            ^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(stable_features)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the feature `never_type_fallback` has been stable since 1.49.0 and no longer requires an attribute to enable
[INFO] [stdout]   --> src/lib.rs:54:12
[INFO] [stdout]    |
[INFO] [stdout] 54 | #![feature(never_type_fallback)]
[INFO] [stdout]    |            ^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 2 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr] error: build failed
[INFO] running `Command { std: "docker" "inspect" "955773b630cf922a1b5245a4a87a71c538586cbbb4304200da9d903c87bb6936", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "955773b630cf922a1b5245a4a87a71c538586cbbb4304200da9d903c87bb6936", kill_on_drop: false }`
[INFO] [stdout] 955773b630cf922a1b5245a4a87a71c538586cbbb4304200da9d903c87bb6936