[INFO] fetching crate failure 0.1.8...
[INFO] checking failure-0.1.8 against master#836c31742687ba4e2f857b5b698e1e9e6b67619c for pr-81789
[INFO] extracting crate failure 0.1.8 into /workspace/builds/worker-4/source
[INFO] validating manifest of crates.io crate failure 0.1.8 on toolchain 836c31742687ba4e2f857b5b698e1e9e6b67619c
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+836c31742687ba4e2f857b5b698e1e9e6b67619c" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate failure 0.1.8
[INFO] finished tweaking crates.io crate failure 0.1.8
[INFO] tweaked toml for crates.io crate failure 0.1.8 written to /workspace/builds/worker-4/source/Cargo.toml
[INFO] crate crates.io crate failure 0.1.8 already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+836c31742687ba4e2f857b5b698e1e9e6b67619c" "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" "ghcr.io/rust-lang/crates-build-env/linux@sha256:20528e8c29e4536546f0102ce88568b16ea7538393a33fcca951030f7af10457" "/opt/rustwide/cargo-home/bin/cargo" "+836c31742687ba4e2f857b5b698e1e9e6b67619c" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 967b8b08b09bf21e5e8ab1c2c1c55428198077c32ba4c48a0e83fcf5c3e7ab2b
[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" "967b8b08b09bf21e5e8ab1c2c1c55428198077c32ba4c48a0e83fcf5c3e7ab2b", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "967b8b08b09bf21e5e8ab1c2c1c55428198077c32ba4c48a0e83fcf5c3e7ab2b", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "967b8b08b09bf21e5e8ab1c2c1c55428198077c32ba4c48a0e83fcf5c3e7ab2b", kill_on_drop: false }`
[INFO] [stdout] 967b8b08b09bf21e5e8ab1c2c1c55428198077c32ba4c48a0e83fcf5c3e7ab2b
[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" "ghcr.io/rust-lang/crates-build-env/linux@sha256:20528e8c29e4536546f0102ce88568b16ea7538393a33fcca951030f7af10457" "/opt/rustwide/cargo-home/bin/cargo" "+836c31742687ba4e2f857b5b698e1e9e6b67619c" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 2542af95f1ea5c95121696c9b83772f6a2ed9e09da98723233355f8b14eeac38
[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" "2542af95f1ea5c95121696c9b83772f6a2ed9e09da98723233355f8b14eeac38", kill_on_drop: false }`
[INFO] [stderr]    Compiling proc-macro2 v1.0.12
[INFO] [stderr]    Compiling unicode-xid v0.2.0
[INFO] [stderr]    Compiling libc v0.2.69
[INFO] [stderr]    Compiling syn v1.0.18
[INFO] [stderr]    Compiling failure_derive v0.1.7
[INFO] [stderr]     Checking rustc-demangle v0.1.16
[INFO] [stderr]    Compiling backtrace-sys v0.1.37
[INFO] [stderr]    Compiling quote v1.0.4
[INFO] [stderr]     Checking backtrace v0.3.46
[INFO] [stderr]    Compiling synstructure v0.12.3
[INFO] [stderr]     Checking failure v0.1.8 (/opt/rustwide/workdir)
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> examples/string_custom_error_pattern.rs:38:32
[INFO] [stdout]    |
[INFO] [stdout] 38 |     fn cause(&self) -> Option<&Fail> {
[INFO] [stdout]    |                                ^^^^ help: use `dyn`: `dyn Fail`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(bare_trait_objects)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> examples/error_as_cause.rs:15:18
[INFO] [stdout]    |
[INFO] [stdout] 15 |     for cause in Fail::iter_causes(&bad_function().unwrap_err()) {
[INFO] [stdout]    |                  ^^^^ help: use `dyn`: `<dyn Fail>`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(bare_trait_objects)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> examples/simple.rs:19:18
[INFO] [stdout]    |
[INFO] [stdout] 19 |     for cause in Fail::iter_chain(&bad_function().unwrap_err()) {
[INFO] [stdout]    |                  ^^^^ help: use `dyn`: `<dyn Fail>`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(bare_trait_objects)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> examples/string_custom_error_pattern.rs:13:18
[INFO] [stdout]    |
[INFO] [stdout] 13 |     for cause in Fail::iter_causes(&err) {
[INFO] [stdout]    |                  ^^^^ help: use `dyn`: `<dyn Fail>`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 2 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 16.82s
[INFO] running `Command { std: "docker" "inspect" "2542af95f1ea5c95121696c9b83772f6a2ed9e09da98723233355f8b14eeac38", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "2542af95f1ea5c95121696c9b83772f6a2ed9e09da98723233355f8b14eeac38", kill_on_drop: false }`
[INFO] [stdout] 2542af95f1ea5c95121696c9b83772f6a2ed9e09da98723233355f8b14eeac38