[INFO] cloning repository https://github.com/eignnx/unifier_set
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/eignnx/unifier_set" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Feignnx%2Funifier_set", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Feignnx%2Funifier_set'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 56465bf232224646a16aefaa1a870f23c2e545e7
[INFO] checking eignnx/unifier_set against master#30840c53f414b753cb08f14620906572f88dda4b for pr-123531
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Feignnx%2Funifier_set" "/workspace/builds/worker-5-tc1/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-5-tc1/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/eignnx/unifier_set on toolchain 30840c53f414b753cb08f14620906572f88dda4b
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+30840c53f414b753cb08f14620906572f88dda4b" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/eignnx/unifier_set
[INFO] finished tweaking git repo https://github.com/eignnx/unifier_set
[INFO] tweaked toml for git repo https://github.com/eignnx/unifier_set written to /workspace/builds/worker-5-tc1/source/Cargo.toml
[INFO] crate git repo https://github.com/eignnx/unifier_set already has a lockfile, it will not be regenerated
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+30840c53f414b753cb08f14620906572f88dda4b" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Updating crates.io index
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded rpds v0.12.0
[INFO] [stderr]   Downloaded archery v0.4.0
[INFO] [stderr]   Downloaded dot_graph v0.2.3
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-tc1/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@sha256:2788e3201cd34a07e3172128adcd8b3090168a8e3bcc40d7c032b9dda1df7d1c" "/opt/rustwide/cargo-home/bin/cargo" "+30840c53f414b753cb08f14620906572f88dda4b" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 468d6038fdaa7320607e64986dd422ce7a0202eab507bd7873756d8360a6a098
[INFO] running `Command { std: "docker" "start" "-a" "468d6038fdaa7320607e64986dd422ce7a0202eab507bd7873756d8360a6a098", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "468d6038fdaa7320607e64986dd422ce7a0202eab507bd7873756d8360a6a098", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "468d6038fdaa7320607e64986dd422ce7a0202eab507bd7873756d8360a6a098", kill_on_drop: false }`
[INFO] [stdout] 468d6038fdaa7320607e64986dd422ce7a0202eab507bd7873756d8360a6a098
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-tc1/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" "RUSTDOCFLAGS=--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@sha256:2788e3201cd34a07e3172128adcd8b3090168a8e3bcc40d7c032b9dda1df7d1c" "/opt/rustwide/cargo-home/bin/cargo" "+30840c53f414b753cb08f14620906572f88dda4b" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] fd8438ddbe1e954ca4445fe98af0d9c08ebbeb1c3022ae8e71465b55717dd4f1
[INFO] running `Command { std: "docker" "start" "-a" "fd8438ddbe1e954ca4445fe98af0d9c08ebbeb1c3022ae8e71465b55717dd4f1", kill_on_drop: false }`
[INFO] [stderr]     Checking static_assertions v1.1.0
[INFO] [stderr]     Checking dot_graph v0.2.3
[INFO] [stderr]     Checking archery v0.4.0
[INFO] [stderr]     Checking rpds v0.12.0
[INFO] [stderr]     Checking unifier_set v0.2.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: the item `fmt` is imported redundantly
[INFO] [stdout]  --> src/unit_tests/mod.rs:2:11
[INFO] [stdout]   |
[INFO] [stdout] 1 | use super::*;
[INFO] [stdout]   |     -------- the item `fmt` is already imported here
[INFO] [stdout] 2 | use std::{fmt, iter};
[INFO] [stdout]   |           ^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: using `.clone()` on a double reference, which returns `&str` instead of cloning the inner type
[INFO] [stdout]   --> src/unit_tests/mod.rs:58:34
[INFO] [stdout]    |
[INFO] [stdout] 58 |             Pred(h, cs) => Pred(h.clone(), cs.iter().map(f).collect()),
[INFO] [stdout]    |                                  ^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(suspicious_double_ref_op)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 2 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 0.57s
[INFO] running `Command { std: "docker" "inspect" "fd8438ddbe1e954ca4445fe98af0d9c08ebbeb1c3022ae8e71465b55717dd4f1", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "fd8438ddbe1e954ca4445fe98af0d9c08ebbeb1c3022ae8e71465b55717dd4f1", kill_on_drop: false }`
[INFO] [stdout] fd8438ddbe1e954ca4445fe98af0d9c08ebbeb1c3022ae8e71465b55717dd4f1
[INFO] checking eignnx/unifier_set against try#18fb860b8a8e7ca508746882328061d0fe352543 for pr-123531
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Feignnx%2Funifier_set" "/workspace/builds/worker-5-tc2/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-5-tc2/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/eignnx/unifier_set on toolchain 18fb860b8a8e7ca508746882328061d0fe352543
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+18fb860b8a8e7ca508746882328061d0fe352543" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/eignnx/unifier_set
[INFO] finished tweaking git repo https://github.com/eignnx/unifier_set
[INFO] tweaked toml for git repo https://github.com/eignnx/unifier_set written to /workspace/builds/worker-5-tc2/source/Cargo.toml
[INFO] crate git repo https://github.com/eignnx/unifier_set already has a lockfile, it will not be regenerated
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+18fb860b8a8e7ca508746882328061d0fe352543" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-tc2/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@sha256:2788e3201cd34a07e3172128adcd8b3090168a8e3bcc40d7c032b9dda1df7d1c" "/opt/rustwide/cargo-home/bin/cargo" "+18fb860b8a8e7ca508746882328061d0fe352543" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 515fa56e117bd30e589ff6cb86c0c4035b631127410a02b55d755ad199cbb1cf
[INFO] running `Command { std: "docker" "start" "-a" "515fa56e117bd30e589ff6cb86c0c4035b631127410a02b55d755ad199cbb1cf", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "515fa56e117bd30e589ff6cb86c0c4035b631127410a02b55d755ad199cbb1cf", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "515fa56e117bd30e589ff6cb86c0c4035b631127410a02b55d755ad199cbb1cf", kill_on_drop: false }`
[INFO] [stdout] 515fa56e117bd30e589ff6cb86c0c4035b631127410a02b55d755ad199cbb1cf
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-tc2/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" "RUSTDOCFLAGS=--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@sha256:2788e3201cd34a07e3172128adcd8b3090168a8e3bcc40d7c032b9dda1df7d1c" "/opt/rustwide/cargo-home/bin/cargo" "+18fb860b8a8e7ca508746882328061d0fe352543" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 3e845208079ca49dab230c52d4fc4bc2e23d05d48fc9d67e6cac1bde7e958fd9
[INFO] running `Command { std: "docker" "start" "-a" "3e845208079ca49dab230c52d4fc4bc2e23d05d48fc9d67e6cac1bde7e958fd9", kill_on_drop: false }`
[INFO] [stderr] error: failed to create directory `/opt/rustwide/target/debug`
[INFO] [stderr] 
[INFO] [stderr] Caused by:
[INFO] [stderr]   No space left on device (os error 28)
[INFO] running `Command { std: "docker" "inspect" "3e845208079ca49dab230c52d4fc4bc2e23d05d48fc9d67e6cac1bde7e958fd9", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "3e845208079ca49dab230c52d4fc4bc2e23d05d48fc9d67e6cac1bde7e958fd9", kill_on_drop: false }`
[INFO] [stdout] 3e845208079ca49dab230c52d4fc4bc2e23d05d48fc9d67e6cac1bde7e958fd9