[INFO] fetching crate ctflag_derive 0.1.2...
[INFO] checking ctflag_derive-0.1.2 against master#836c31742687ba4e2f857b5b698e1e9e6b67619c for pr-81789
[INFO] extracting crate ctflag_derive 0.1.2 into /workspace/builds/worker-12/source
[INFO] validating manifest of crates.io crate ctflag_derive 0.1.2 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 ctflag_derive 0.1.2
[INFO] finished tweaking crates.io crate ctflag_derive 0.1.2
[INFO] tweaked toml for crates.io crate ctflag_derive 0.1.2 written to /workspace/builds/worker-12/source/Cargo.toml
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+836c31742687ba4e2f857b5b698e1e9e6b67619c" "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" "+836c31742687ba4e2f857b5b698e1e9e6b67619c" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-12/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-12/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] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] [stdout] 6175cb8eec91e1f162ba44efc67c81a4301b52c2c3b059e7888aea5085f5d42f
[INFO] running `Command { std: "docker" "start" "-a" "6175cb8eec91e1f162ba44efc67c81a4301b52c2c3b059e7888aea5085f5d42f", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "6175cb8eec91e1f162ba44efc67c81a4301b52c2c3b059e7888aea5085f5d42f", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "6175cb8eec91e1f162ba44efc67c81a4301b52c2c3b059e7888aea5085f5d42f", kill_on_drop: false }`
[INFO] [stdout] 6175cb8eec91e1f162ba44efc67c81a4301b52c2c3b059e7888aea5085f5d42f
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-12/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-12/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] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] [stdout] 849633f82df816f0828768950a90bb5456f13ac74ed3eef30cbfa22fcde10f26
[INFO] running `Command { std: "docker" "start" "-a" "849633f82df816f0828768950a90bb5456f13ac74ed3eef30cbfa22fcde10f26", kill_on_drop: false }`
[INFO] [stderr]    Compiling proc-macro2 v0.4.30
[INFO] [stderr]     Checking unicode-xid v0.1.0
[INFO] [stderr]     Checking quote v0.6.13
[INFO] [stderr]     Checking syn v0.15.44
[INFO] [stderr]     Checking ctflag_derive v0.1.2 (/opt/rustwide/workdir)
[INFO] [stdout] warning: the item `ToTokens` is imported redundantly
[INFO] [stdout]    --> src/lib.rs:513:21
[INFO] [stdout]     |
[INFO] [stdout] 22  | use quote::{quote, quote_spanned, ToTokens};
[INFO] [stdout]     |                                   -------- the item `ToTokens` is already imported here
[INFO] [stdout] ...
[INFO] [stdout] 513 |                 use quote::ToTokens;
[INFO] [stdout]     |                     ^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `ToTokens` is imported redundantly
[INFO] [stdout]    --> src/lib.rs:513:21
[INFO] [stdout]     |
[INFO] [stdout] 22  | use quote::{quote, quote_spanned, ToTokens};
[INFO] [stdout]     |                                   -------- the item `ToTokens` is already imported here
[INFO] [stdout] ...
[INFO] [stdout] 513 |                 use quote::ToTokens;
[INFO] [stdout]     |                     ^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 5.22s
[INFO] running `Command { std: "docker" "inspect" "849633f82df816f0828768950a90bb5456f13ac74ed3eef30cbfa22fcde10f26", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "849633f82df816f0828768950a90bb5456f13ac74ed3eef30cbfa22fcde10f26", kill_on_drop: false }`
[INFO] [stdout] 849633f82df816f0828768950a90bb5456f13ac74ed3eef30cbfa22fcde10f26