[INFO] fetching crate rstb 0.1.2...
[INFO] checking rstb-0.1.2 against try#f6e2f78768c57172b99c3e85892f867894dc7e30 for pr-75502
[INFO] extracting crate rstb 0.1.2 into /workspace/builds/worker-7/source
[INFO] validating manifest of crates.io crate rstb 0.1.2 on toolchain f6e2f78768c57172b99c3e85892f867894dc7e30
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+f6e2f78768c57172b99c3e85892f867894dc7e30" "read-manifest" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] started tweaking crates.io crate rstb 0.1.2
[INFO] finished tweaking crates.io crate rstb 0.1.2
[INFO] tweaked toml for crates.io crate rstb 0.1.2 written to /workspace/builds/worker-7/source/Cargo.toml
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+f6e2f78768c57172b99c3e85892f867894dc7e30" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update", kill_on_drop: false }`
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+f6e2f78768c57172b99c3e85892f867894dc7e30" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7/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" "+f6e2f78768c57172b99c3e85892f867894dc7e30" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] e7b54e5d9a0c4753c909f30636d0b82a2b5228f205d58e70cab274cf5f0dc6bb
[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" "e7b54e5d9a0c4753c909f30636d0b82a2b5228f205d58e70cab274cf5f0dc6bb", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "e7b54e5d9a0c4753c909f30636d0b82a2b5228f205d58e70cab274cf5f0dc6bb", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "e7b54e5d9a0c4753c909f30636d0b82a2b5228f205d58e70cab274cf5f0dc6bb", kill_on_drop: false }`
[INFO] [stdout] e7b54e5d9a0c4753c909f30636d0b82a2b5228f205d58e70cab274cf5f0dc6bb
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7/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" "+f6e2f78768c57172b99c3e85892f867894dc7e30" "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] 3bc1a2b08a8e534834d206d405a6de5c292d7c1cbc97f97efa8ad6123862f07a
[INFO] running `Command { std: "docker" "start" "-a" "3bc1a2b08a8e534834d206d405a6de5c292d7c1cbc97f97efa8ad6123862f07a", kill_on_drop: false }`
[INFO] [stderr]    Compiling syn v1.0.39
[INFO] [stderr]    Compiling log v0.4.11
[INFO] [stderr]    Compiling fastrand v1.3.4
[INFO] [stderr]    Compiling waker-fn v1.1.0
[INFO] [stderr]    Compiling parking v2.0.0
[INFO] [stderr]    Compiling event-listener v2.4.0
[INFO] [stderr]     Checking once_cell v1.4.1
[INFO] [stderr]    Compiling vec-arena v0.5.2
[INFO] [stderr]    Compiling arrayvec v0.4.12
[INFO] [stderr]     Checking scoped-tls v1.0.0
[INFO] [stderr]    Compiling hashbrown v0.8.2
[INFO] [stderr]    Compiling indexmap v1.5.1
[INFO] [stderr]     Checking async-mutex v1.1.5
[INFO] [stderr]    Compiling paste-impl v0.1.18
[INFO] [stderr]    Compiling libc v0.2.76
[INFO] [stderr]     Checking multitask v0.2.0
[INFO] [stderr]     Checking async-channel v1.4.1
[INFO] [stderr]     Checking socket2 v0.3.12
[INFO] [stderr]     Checking polling v0.1.5
[INFO] [stderr]    Compiling crossbeam-utils v0.7.2
[INFO] [stderr]     Checking futures-lite v0.1.11
[INFO] [stderr]     Checking parse_int v0.4.0
[INFO] [stderr]    Compiling kv-log-macro v1.0.7
[INFO] [stderr]    Compiling num_cpus v1.13.0
[INFO] [stderr]     Checking paste v0.1.18
[INFO] [stderr]     Checking async-io v0.1.11
[INFO] [stderr]     Checking blocking v0.5.2
[INFO] [stderr]     Checking yaz0 v0.1.2
[INFO] [stderr]     Checking async-executor v0.1.2
[INFO] [stderr]    Compiling darling_core v0.10.2
[INFO] [stderr]    Compiling serde_derive v1.0.115
[INFO] [stderr]    Compiling async-attributes v1.1.1
[INFO] [stderr]    Compiling binread_derive v1.1.0
[INFO] [stderr]    Compiling binwrite_derive v0.2.1
[INFO] [stderr]    Compiling darling_macro v0.10.2
[INFO] [stderr]    Compiling async-std v1.6.3
[INFO] [stderr]     Checking binwrite v0.2.1
[INFO] [stderr]    Compiling darling v0.10.2
[INFO] [stderr]     Checking binread v1.1.0
[INFO] [stderr]     Checking serde v1.0.115
[INFO] [stderr]    Compiling cached_proc_macro v0.1.2
[INFO] [stderr]     Checking cached v0.13.1
[INFO] [stderr]     Checking bstr v0.2.13
[INFO] [stderr]     Checking serde_json v1.0.57
[INFO] [stderr]     Checking csv v1.1.3
[INFO] [stderr]     Checking rstb v0.1.2 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 1m 35s
[INFO] running `Command { std: "docker" "inspect" "3bc1a2b08a8e534834d206d405a6de5c292d7c1cbc97f97efa8ad6123862f07a", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "3bc1a2b08a8e534834d206d405a6de5c292d7c1cbc97f97efa8ad6123862f07a", kill_on_drop: false }`
[INFO] [stdout] 3bc1a2b08a8e534834d206d405a6de5c292d7c1cbc97f97efa8ad6123862f07a