[INFO] fetching crate bigint2 0.1.0...
[INFO] checking bigint2-0.1.0 against master#5a8a44196b3cf099f8c9b0156bd902eaec0b4e5f for pr-87248
[INFO] extracting crate bigint2 0.1.0 into /workspace/builds/worker-2/source
[INFO] validating manifest of crates.io crate bigint2 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] started tweaking crates.io crate bigint2 0.1.0
[INFO] finished tweaking crates.io crate bigint2 0.1.0
[INFO] tweaked toml for crates.io crate bigint2 0.1.0 written to /workspace/builds/worker-2/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-2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2/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] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] [stdout] 869754e33e22135a6e0023a6afe5189e1471bf014df96263bfb23746bf3a3315
[INFO] running `Command { std: "docker" "start" "-a" "869754e33e22135a6e0023a6afe5189e1471bf014df96263bfb23746bf3a3315", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "869754e33e22135a6e0023a6afe5189e1471bf014df96263bfb23746bf3a3315", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "869754e33e22135a6e0023a6afe5189e1471bf014df96263bfb23746bf3a3315", kill_on_drop: false }`
[INFO] [stdout] 869754e33e22135a6e0023a6afe5189e1471bf014df96263bfb23746bf3a3315
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2/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] [stdout] 45d310c9894ac250a2afb3a56a60f00f8c849c8f952e5dc91a7c2d3e770594ab
[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" "45d310c9894ac250a2afb3a56a60f00f8c849c8f952e5dc91a7c2d3e770594ab", kill_on_drop: false }`
[INFO] [stderr]    Compiling heapsize v0.3.9
[INFO] [stderr]     Checking rustc-serialize v0.3.24
[INFO] [stderr]     Checking byteorder v1.4.3
[INFO] [stderr]     Checking elastic-array v0.7.0
[INFO] [stderr]     Checking rlp2 v0.2.0
[INFO] [stderr]     Checking bigint2 v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: constant is never used: `ZERO_BIG_DIGIT`
[INFO] [stdout]   --> src/algorithms.rs:31:5
[INFO] [stdout]    |
[INFO] [stdout] 31 |     pub const ZERO_BIG_DIGIT: BigDigit = 0;
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `to_doublebigdigit`
[INFO] [stdout]   --> src/algorithms.rs:56:12
[INFO] [stdout]    |
[INFO] [stdout] 56 |     pub fn to_doublebigdigit(hi: BigDigit, lo: BigDigit) -> DoubleBigDigit {
[INFO] [stdout]    |            ^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 2 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: constant is never used: `ZERO_BIG_DIGIT`
[INFO] [stdout]   --> src/algorithms.rs:31:5
[INFO] [stdout]    |
[INFO] [stdout] 31 |     pub const ZERO_BIG_DIGIT: BigDigit = 0;
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `to_doublebigdigit`
[INFO] [stdout]   --> src/algorithms.rs:56:12
[INFO] [stdout]    |
[INFO] [stdout] 56 |     pub fn to_doublebigdigit(hi: BigDigit, lo: BigDigit) -> DoubleBigDigit {
[INFO] [stdout]    |            ^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 2 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 3.96s
[INFO] running `Command { std: "docker" "inspect" "45d310c9894ac250a2afb3a56a60f00f8c849c8f952e5dc91a7c2d3e770594ab", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "45d310c9894ac250a2afb3a56a60f00f8c849c8f952e5dc91a7c2d3e770594ab", kill_on_drop: false }`
[INFO] [stdout] 45d310c9894ac250a2afb3a56a60f00f8c849c8f952e5dc91a7c2d3e770594ab