[INFO] fetching crate rcstring 0.2.1...
[INFO] checking rcstring-0.2.1 against try#169954edd744527414c631e9af1bbdc537b0cdf2 for pr-75192
[INFO] extracting crate rcstring 0.2.1 into /workspace/builds/worker-2/source
[INFO] validating manifest of crates.io crate rcstring 0.2.1 on toolchain 169954edd744527414c631e9af1bbdc537b0cdf2
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+169954edd744527414c631e9af1bbdc537b0cdf2" "read-manifest" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] started tweaking crates.io crate rcstring 0.2.1
[INFO] finished tweaking crates.io crate rcstring 0.2.1
[INFO] tweaked toml for crates.io crate rcstring 0.2.1 written to /workspace/builds/worker-2/source/Cargo.toml
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+169954edd744527414c631e9af1bbdc537b0cdf2" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update", kill_on_drop: false }`
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+169954edd744527414c631e9af1bbdc537b0cdf2" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[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" "rustops/crates-build-env@sha256:a636fd89d022f18117e1dc8fb37a0a009933cdbbe082814857f0e2024962d47c" "/opt/rustwide/cargo-home/bin/cargo" "+169954edd744527414c631e9af1bbdc537b0cdf2" "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] a93ae4aaa232829b408b3717095a35258bb691bfc244654a6d05fc844cbd6135
[INFO] running `Command { std: "docker" "start" "-a" "a93ae4aaa232829b408b3717095a35258bb691bfc244654a6d05fc844cbd6135", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "a93ae4aaa232829b408b3717095a35258bb691bfc244654a6d05fc844cbd6135", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "a93ae4aaa232829b408b3717095a35258bb691bfc244654a6d05fc844cbd6135", kill_on_drop: false }`
[INFO] [stdout] a93ae4aaa232829b408b3717095a35258bb691bfc244654a6d05fc844cbd6135
[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" "rustops/crates-build-env@sha256:a636fd89d022f18117e1dc8fb37a0a009933cdbbe082814857f0e2024962d47c" "/opt/rustwide/cargo-home/bin/cargo" "+169954edd744527414c631e9af1bbdc537b0cdf2" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 596293ec31cd32dfd06794d79cc8b0b84e5e4861da62adbb0fc5ea381539f16c
[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" "596293ec31cd32dfd06794d79cc8b0b84e5e4861da62adbb0fc5ea381539f16c", kill_on_drop: false }`
[INFO] [stderr]     Checking rcstring v0.2.1 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.27s
[INFO] running `Command { std: "docker" "inspect" "596293ec31cd32dfd06794d79cc8b0b84e5e4861da62adbb0fc5ea381539f16c", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "596293ec31cd32dfd06794d79cc8b0b84e5e4861da62adbb0fc5ea381539f16c", kill_on_drop: false }`
[INFO] [stdout] 596293ec31cd32dfd06794d79cc8b0b84e5e4861da62adbb0fc5ea381539f16c