[INFO] fetching crate embedded-profiling 0.1.5...
[INFO] checking embedded-profiling-0.1.5 against master#936f2600b6c903b04387f74ed5cbce88bb06d243 for pr-91141
[INFO] extracting crate embedded-profiling 0.1.5 into /workspace/builds/worker-10/source
[INFO] validating manifest of crates.io crate embedded-profiling 0.1.5 on toolchain 936f2600b6c903b04387f74ed5cbce88bb06d243
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+936f2600b6c903b04387f74ed5cbce88bb06d243" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate embedded-profiling 0.1.5
[INFO] finished tweaking crates.io crate embedded-profiling 0.1.5
[INFO] tweaked toml for crates.io crate embedded-profiling 0.1.5 written to /workspace/builds/worker-10/source/Cargo.toml
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+936f2600b6c903b04387f74ed5cbce88bb06d243" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+936f2600b6c903b04387f74ed5cbce88bb06d243" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-10/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-10/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@sha256:5736fa189c1c60b01babf4b8b698fe57b6ecc41933a7ff2e0b8d7a221459412b" "/opt/rustwide/cargo-home/bin/cargo" "+936f2600b6c903b04387f74ed5cbce88bb06d243" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] c43cf189b4ba625eb89f4f84e3914ad93c97ff3b49aafedf52ff98183ad65c55
[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" "c43cf189b4ba625eb89f4f84e3914ad93c97ff3b49aafedf52ff98183ad65c55", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "c43cf189b4ba625eb89f4f84e3914ad93c97ff3b49aafedf52ff98183ad65c55", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "c43cf189b4ba625eb89f4f84e3914ad93c97ff3b49aafedf52ff98183ad65c55", kill_on_drop: false }`
[INFO] [stdout] c43cf189b4ba625eb89f4f84e3914ad93c97ff3b49aafedf52ff98183ad65c55
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-10/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-10/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@sha256:5736fa189c1c60b01babf4b8b698fe57b6ecc41933a7ff2e0b8d7a221459412b" "/opt/rustwide/cargo-home/bin/cargo" "+936f2600b6c903b04387f74ed5cbce88bb06d243" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 54c80fe914555c8ce42dc0a77e8b994f777ad24d9942aa910ff7efc73256d414
[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" "54c80fe914555c8ce42dc0a77e8b994f777ad24d9942aa910ff7efc73256d414", kill_on_drop: false }`
[INFO] [stderr]     Checking nb v1.0.0
[INFO] [stderr]     Checking vcell v0.1.3
[INFO] [stderr]    Compiling cortex-m v0.7.3
[INFO] [stderr]     Checking bitfield v0.13.2
[INFO] [stderr]     Checking fugit v0.2.1
[INFO] [stderr]     Checking once_cell v1.8.0
[INFO] [stderr]    Compiling bare-metal v0.2.5
[INFO] [stderr]     Checking volatile-register v0.2.1
[INFO] [stderr]     Checking nb v0.1.3
[INFO] [stderr]     Checking embedded-hal v0.2.6
[INFO] [stderr]     Checking embedded-profiling v0.1.5 (/opt/rustwide/workdir)
[INFO] [stdout] warning: the item `TryInto` is imported redundantly
[INFO] [stdout]    --> src/mock.rs:17:13
[INFO] [stdout]     |
[INFO] [stdout] 17  |         use std::convert::TryInto;
[INFO] [stdout]     |             ^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0596]: cannot borrow `profiler` as mutable, as it is not declared as mutable
[INFO] [stdout]    --> src/lib.rs:234:21
[INFO] [stdout]     |
[INFO] [stdout] 232 |         let profiler = StdMockProfiler::default();
[INFO] [stdout]     |             -------- help: consider changing this to be mutable: `mut profiler`
[INFO] [stdout] 233 | 
[INFO] [stdout] 234 |         let start = profiler.start_snapshot();
[INFO] [stdout]     |                     ^^^^^^^^^^^^^^^^^^^^^^^^^ cannot borrow as mutable
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to previous error; 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0596`.
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `embedded-profiling` due to 2 previous errors; 1 warning emitted
[INFO] running `Command { std: "docker" "inspect" "54c80fe914555c8ce42dc0a77e8b994f777ad24d9942aa910ff7efc73256d414", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "54c80fe914555c8ce42dc0a77e8b994f777ad24d9942aa910ff7efc73256d414", kill_on_drop: false }`
[INFO] [stdout] 54c80fe914555c8ce42dc0a77e8b994f777ad24d9942aa910ff7efc73256d414