[INFO] fetching crate stm32f1xx-futures 0.1.0...
[INFO] checking stm32f1xx-futures-0.1.0 against master#5a8a44196b3cf099f8c9b0156bd902eaec0b4e5f for pr-87248
[INFO] extracting crate stm32f1xx-futures 0.1.0 into /workspace/builds/worker-6/source
[INFO] validating manifest of crates.io crate stm32f1xx-futures 0.1.0 on toolchain 5a8a44196b3cf099f8c9b0156bd902eaec0b4e5f
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+5a8a44196b3cf099f8c9b0156bd902eaec0b4e5f" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] removed /workspace/builds/worker-6/source/.cargo/config
[INFO] started tweaking crates.io crate stm32f1xx-futures 0.1.0
[INFO] finished tweaking crates.io crate stm32f1xx-futures 0.1.0
[INFO] tweaked toml for crates.io crate stm32f1xx-futures 0.1.0 written to /workspace/builds/worker-6/source/Cargo.toml
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+5a8a44196b3cf099f8c9b0156bd902eaec0b4e5f" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update", kill_on_drop: false }`
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+5a8a44196b3cf099f8c9b0156bd902eaec0b4e5f" "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-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" "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@sha256:34b6a614d2c27851fe6cbf88fbd1137609cefab8b10d0615aaeb6fd47975d74e" "/opt/rustwide/cargo-home/bin/cargo" "+5a8a44196b3cf099f8c9b0156bd902eaec0b4e5f" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 3ba3e4359f7df93270cf33685c67d7a7a8bc891fe83cbe7b73b239e9499a8310
[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" "3ba3e4359f7df93270cf33685c67d7a7a8bc891fe83cbe7b73b239e9499a8310", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "3ba3e4359f7df93270cf33685c67d7a7a8bc891fe83cbe7b73b239e9499a8310", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "3ba3e4359f7df93270cf33685c67d7a7a8bc891fe83cbe7b73b239e9499a8310", kill_on_drop: false }`
[INFO] [stdout] 3ba3e4359f7df93270cf33685c67d7a7a8bc891fe83cbe7b73b239e9499a8310
[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" "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@sha256:34b6a614d2c27851fe6cbf88fbd1137609cefab8b10d0615aaeb6fd47975d74e" "/opt/rustwide/cargo-home/bin/cargo" "+5a8a44196b3cf099f8c9b0156bd902eaec0b4e5f" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] [stdout] caec862a85651eaeed1c69588d7542aa17167e61a3da45308441d28a0ff53d46
[INFO] running `Command { std: "docker" "start" "-a" "caec862a85651eaeed1c69588d7542aa17167e61a3da45308441d28a0ff53d46", kill_on_drop: false }`
[INFO] [stderr]    Compiling semver-parser v0.7.0
[INFO] [stderr]    Compiling cortex-m v0.7.3
[INFO] [stderr]     Checking vcell v0.1.3
[INFO] [stderr]    Compiling futures-task v0.3.16
[INFO] [stderr]    Compiling heapless v0.6.1
[INFO] [stderr]     Checking futures-sink v0.3.16
[INFO] [stderr]     Checking byteorder v1.4.3
[INFO] [stderr]    Compiling stm32f1 v0.11.0
[INFO] [stderr]     Checking scopeguard v1.1.0
[INFO] [stderr]     Checking pin-utils v0.1.0
[INFO] [stderr]     Checking pin-project-lite v0.2.7
[INFO] [stderr]     Checking futures-io v0.3.16
[INFO] [stderr]    Compiling indexmap v1.7.0
[INFO] [stderr]    Compiling futures-util v0.3.16
[INFO] [stderr]    Compiling cortex-m-rtic v0.5.7
[INFO] [stderr]     Checking embedded-dma v0.1.2
[INFO] [stderr]     Checking typenum v1.13.0
[INFO] [stderr]     Checking embedded-hal v0.2.5
[INFO] [stderr]     Checking futures-core v0.3.16
[INFO] [stderr]     Checking volatile-register v0.2.0
[INFO] [stderr]     Checking cortex-m-rt v0.6.15
[INFO] [stderr]     Checking cast v0.2.7
[INFO] [stderr]     Checking lock_api v0.3.4
[INFO] [stderr]    Compiling semver v0.9.0
[INFO] [stderr]     Checking hash32 v0.1.1
[INFO] [stderr]     Checking futures-channel v0.3.16
[INFO] [stderr]     Checking polymer-core v0.1.0
[INFO] [stderr]    Compiling cortex-m v0.6.7
[INFO] [stdout] error[E0557]: feature has been removed
[INFO] [stdout]  --> /opt/rustwide/cargo-home/registry/src/github.com-1ecc6299db9ec823/polymer-core-0.1.0/src/lib.rs:2:34
[INFO] [stdout]   |
[INFO] [stdout] 2 | #![feature(arbitrary_self_types, const_fn, never_type)]
[INFO] [stdout]   |                                  ^^^^^^^^ feature has been removed
[INFO] [stdout]   |
[INFO] [stdout]   = note: split into finer-grained feature gates
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to previous error
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0557`.
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `polymer-core` due to 2 previous errors
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stderr] error: build failed
[INFO] running `Command { std: "docker" "inspect" "caec862a85651eaeed1c69588d7542aa17167e61a3da45308441d28a0ff53d46", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "caec862a85651eaeed1c69588d7542aa17167e61a3da45308441d28a0ff53d46", kill_on_drop: false }`
[INFO] [stdout] caec862a85651eaeed1c69588d7542aa17167e61a3da45308441d28a0ff53d46