[INFO] cloning repository https://github.com/purefunctor/inference-with-constraints
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/purefunctor/inference-with-constraints" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fpurefunctor%2Finference-with-constraints", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fpurefunctor%2Finference-with-constraints'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 31f02df87e5d750c83721d313a9b93ee8f2bec86
[INFO] building purefunctor/inference-with-constraints against try#334963c956d25708feab489a3816ae63f639355d for pr-135216
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fpurefunctor%2Finference-with-constraints" "/workspace/builds/worker-0-tc2/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-0-tc2/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/purefunctor/inference-with-constraints on toolchain 334963c956d25708feab489a3816ae63f639355d
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+334963c956d25708feab489a3816ae63f639355d" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/purefunctor/inference-with-constraints
[INFO] finished tweaking git repo https://github.com/purefunctor/inference-with-constraints
[INFO] tweaked toml for git repo https://github.com/purefunctor/inference-with-constraints written to /workspace/builds/worker-0-tc2/source/Cargo.toml
[INFO] crate git repo https://github.com/purefunctor/inference-with-constraints 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" "+334963c956d25708feab489a3816ae63f639355d" "fetch" "--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-0-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-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:f3a9d4ad9d972b27faf3965f35b62e55ba32bbce8f20bc8fe909558a86702fde" "/opt/rustwide/cargo-home/bin/cargo" "+334963c956d25708feab489a3816ae63f639355d" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 1b29b55bcc8db6b597e68a0eebe1be81fc5eec0e9869e146b286ab6361bb9514
[INFO] running `Command { std: "docker" "start" "-a" "1b29b55bcc8db6b597e68a0eebe1be81fc5eec0e9869e146b286ab6361bb9514", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "1b29b55bcc8db6b597e68a0eebe1be81fc5eec0e9869e146b286ab6361bb9514", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "1b29b55bcc8db6b597e68a0eebe1be81fc5eec0e9869e146b286ab6361bb9514", kill_on_drop: false }`
[INFO] [stdout] 1b29b55bcc8db6b597e68a0eebe1be81fc5eec0e9869e146b286ab6361bb9514
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-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:f3a9d4ad9d972b27faf3965f35b62e55ba32bbce8f20bc8fe909558a86702fde" "/opt/rustwide/cargo-home/bin/cargo" "+334963c956d25708feab489a3816ae63f639355d" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] b37b082653dace7cb42038e519272a990a94c5fb10d0db95bf49bc54c7bdcbce
[INFO] running `Command { std: "docker" "start" "-a" "b37b082653dace7cb42038e519272a990a94c5fb10d0db95bf49bc54c7bdcbce", kill_on_drop: false }`
[INFO] [stderr]    Compiling typenum v1.16.0
[INFO] [stderr]    Compiling version_check v0.9.4
[INFO] [stderr]    Compiling rand_core v0.6.4
[INFO] [stderr]    Compiling autocfg v1.1.0
[INFO] [stderr]    Compiling smol_str v0.2.0
[INFO] [stderr]    Compiling crossbeam-utils v0.8.16
[INFO] [stderr]    Compiling iwc-arena v0.1.0 (/opt/rustwide/workdir/iwc-arena)
[INFO] [stderr]    Compiling anyhow v1.0.72
[INFO] [stderr]    Compiling cfg-if v1.0.0
[INFO] [stderr]    Compiling hashbrown v0.12.3
[INFO] [stderr]    Compiling rand_xoshiro v0.6.0
[INFO] [stderr]    Compiling fixedbitset v0.4.2
[INFO] [stderr]    Compiling indexmap v1.9.3
[INFO] [stderr]    Compiling im v15.1.0
[INFO] [stderr]    Compiling concurrent-queue v2.2.0
[INFO] [stderr]    Compiling petgraph v0.6.3
[INFO] [stderr]    Compiling bitmaps v2.1.0
[INFO] [stderr]    Compiling sized-chunks v0.6.5
[INFO] [stderr]    Compiling iwc-core-ast v0.1.0 (/opt/rustwide/workdir/iwc-core-ast)
[INFO] [stderr]    Compiling iwc-core-error v0.1.0 (/opt/rustwide/workdir/iwc-core-error)
[INFO] [stderr]    Compiling iwc-core-constraint v0.1.0 (/opt/rustwide/workdir/iwc-core-constraint)
[INFO] [stderr]    Compiling iwc-core-elaborate v0.1.0 (/opt/rustwide/workdir/iwc-core-elaborate)
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 6.83s
[INFO] running `Command { std: "docker" "inspect" "b37b082653dace7cb42038e519272a990a94c5fb10d0db95bf49bc54c7bdcbce", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "b37b082653dace7cb42038e519272a990a94c5fb10d0db95bf49bc54c7bdcbce", kill_on_drop: false }`
[INFO] [stdout] b37b082653dace7cb42038e519272a990a94c5fb10d0db95bf49bc54c7bdcbce
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-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:f3a9d4ad9d972b27faf3965f35b62e55ba32bbce8f20bc8fe909558a86702fde" "/opt/rustwide/cargo-home/bin/cargo" "+334963c956d25708feab489a3816ae63f639355d" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] ddbd184052633bf53c2631894ef796140a7901bb27bfd39492baa46a07077f4c
[INFO] running `Command { std: "docker" "start" "-a" "ddbd184052633bf53c2631894ef796140a7901bb27bfd39492baa46a07077f4c", kill_on_drop: false }`
[INFO] [stderr]    Compiling iwc-arena v0.1.0 (/opt/rustwide/workdir/iwc-arena)
[INFO] [stderr]    Compiling iwc-core-ast v0.1.0 (/opt/rustwide/workdir/iwc-core-ast)
[INFO] [stderr]    Compiling iwc-core-error v0.1.0 (/opt/rustwide/workdir/iwc-core-error)
[INFO] [stderr]    Compiling iwc-core-constraint v0.1.0 (/opt/rustwide/workdir/iwc-core-constraint)
[INFO] [stderr]    Compiling iwc-core-elaborate v0.1.0 (/opt/rustwide/workdir/iwc-core-elaborate)
[INFO] [stderr]     Finished `test` profile [unoptimized + debuginfo] target(s) in 1.38s
[INFO] running `Command { std: "docker" "inspect" "ddbd184052633bf53c2631894ef796140a7901bb27bfd39492baa46a07077f4c", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "ddbd184052633bf53c2631894ef796140a7901bb27bfd39492baa46a07077f4c", kill_on_drop: false }`
[INFO] [stdout] ddbd184052633bf53c2631894ef796140a7901bb27bfd39492baa46a07077f4c