[INFO] cloning repository https://github.com/bornedj/rustBook
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/bornedj/rustBook" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fbornedj%2FrustBook", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fbornedj%2FrustBook'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] d9992f8642af19d6d58dad2b7edb71b21068bb25
[INFO] building bornedj/rustBook against master#11663cd3bfefef7d34e8f0892c250bf698049392+rustflags=-Dtail-expr-drop-order for pr-134523
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fbornedj%2FrustBook" "/workspace/builds/worker-3-tc1/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-3-tc1/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/bornedj/rustBook on toolchain 11663cd3bfefef7d34e8f0892c250bf698049392
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+11663cd3bfefef7d34e8f0892c250bf698049392" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/bornedj/rustBook
[INFO] finished tweaking git repo https://github.com/bornedj/rustBook
[INFO] tweaked toml for git repo https://github.com/bornedj/rustBook written to /workspace/builds/worker-3-tc1/source/Cargo.toml
[INFO] crate git repo https://github.com/bornedj/rustBook 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" "+11663cd3bfefef7d34e8f0892c250bf698049392" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr] warning: virtual workspace defaulting to `resolver = "1"` despite one or more workspace members being on edition 2021 which implies `resolver = "2"`
[INFO] [stderr] note: to keep the current resolver, specify `workspace.resolver = "1"` in the workspace root's manifest
[INFO] [stderr] note: to use the edition 2021 resolver, specify `workspace.resolver = "2"` in the workspace root's manifest
[INFO] [stderr] note: for more details see https://doc.rust-lang.org/cargo/reference/resolver.html#resolver-versions
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-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:f3a9d4ad9d972b27faf3965f35b62e55ba32bbce8f20bc8fe909558a86702fde" "/opt/rustwide/cargo-home/bin/cargo" "+11663cd3bfefef7d34e8f0892c250bf698049392" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] be46e3df86081a6888d0abfadfdba9626143d803eb632de6d0fc5f76559e5ca0
[INFO] running `Command { std: "docker" "start" "-a" "be46e3df86081a6888d0abfadfdba9626143d803eb632de6d0fc5f76559e5ca0", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "be46e3df86081a6888d0abfadfdba9626143d803eb632de6d0fc5f76559e5ca0", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "be46e3df86081a6888d0abfadfdba9626143d803eb632de6d0fc5f76559e5ca0", kill_on_drop: false }`
[INFO] [stdout] be46e3df86081a6888d0abfadfdba9626143d803eb632de6d0fc5f76559e5ca0
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-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 -Dtail-expr-drop-order" "-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" "+11663cd3bfefef7d34e8f0892c250bf698049392" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 8fac3c8970a59b4c9f17231f18c588d61d765df170ac2c2301bb44d910df4eec
[INFO] running `Command { std: "docker" "start" "-a" "8fac3c8970a59b4c9f17231f18c588d61d765df170ac2c2301bb44d910df4eec", kill_on_drop: false }`
[INFO] [stderr] warning: virtual workspace defaulting to `resolver = "1"` despite one or more workspace members being on edition 2021 which implies `resolver = "2"`
[INFO] [stderr] note: to keep the current resolver, specify `workspace.resolver = "1"` in the workspace root's manifest
[INFO] [stderr] note: to use the edition 2021 resolver, specify `workspace.resolver = "2"` in the workspace root's manifest
[INFO] [stderr] note: for more details see https://doc.rust-lang.org/cargo/reference/resolver.html#resolver-versions
[INFO] [stderr]    Compiling libc v0.2.132
[INFO] [stderr]    Compiling cfg-if v1.0.0
[INFO] [stderr]    Compiling ppv-lite86 v0.2.16
[INFO] [stderr]    Compiling advanced_rust v0.1.0 (/opt/rustwide/workdir/advanced_rust)
[INFO] [stderr]    Compiling smart_pointers v0.1.0 (/opt/rustwide/workdir/smart_pointers)
[INFO] [stderr]    Compiling patterns v0.1.0 (/opt/rustwide/workdir/patterns)
[INFO] [stderr]    Compiling minigrep v0.1.0 (/opt/rustwide/workdir/minigrep)
[INFO] [stderr]    Compiling hello v0.1.0 (/opt/rustwide/workdir/hello)
[INFO] [stderr]    Compiling oop v0.1.0 (/opt/rustwide/workdir/oop)
[INFO] [stderr]    Compiling concurrency v0.1.0 (/opt/rustwide/workdir/concurrency)
[INFO] [stderr]    Compiling error_handling v0.1.0 (/opt/rustwide/workdir/error_handling)
[INFO] [stderr]    Compiling generics_traits_lifetimes v0.1.0 (/opt/rustwide/workdir/generics_traits_lifetimes)
[INFO] [stderr]    Compiling rectangles v0.1.0 (/opt/rustwide/workdir/rectangles)
[INFO] [stderr]    Compiling closures v0.1.0 (/opt/rustwide/workdir/closures)
[INFO] [stderr]    Compiling branches v0.1.0 (/opt/rustwide/workdir/branches)
[INFO] [stderr]    Compiling iterators v0.1.0 (/opt/rustwide/workdir/iterators)
[INFO] [stdout] warning: trait `Foo` is never used
[INFO] [stdout]   --> advanced_rust/src/unsafe_rust.rs:68:14
[INFO] [stdout]    |
[INFO] [stdout] 68 | unsafe trait Foo {
[INFO] [stdout]    |              ^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]    Compiling enums v0.1.0 (/opt/rustwide/workdir/enums)
[INFO] [stderr]    Compiling variables v0.1.0 (/opt/rustwide/workdir/variables)
[INFO] [stderr]    Compiling functions v0.1.0 (/opt/rustwide/workdir/functions)
[INFO] [stderr]    Compiling ownership v0.1.0 (/opt/rustwide/workdir/ownership)
[INFO] [stderr]    Compiling collections v0.1.0 (/opt/rustwide/workdir/collections)
[INFO] [stderr]    Compiling getrandom v0.2.7
[INFO] [stderr]    Compiling rand_core v0.6.3
[INFO] [stderr]    Compiling rand_chacha v0.3.1
[INFO] [stderr]    Compiling rand v0.8.5
[INFO] [stderr]    Compiling guessing_game v0.1.0 (/opt/rustwide/workdir/guessing_game)
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 1.73s
[INFO] running `Command { std: "docker" "inspect" "8fac3c8970a59b4c9f17231f18c588d61d765df170ac2c2301bb44d910df4eec", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "8fac3c8970a59b4c9f17231f18c588d61d765df170ac2c2301bb44d910df4eec", kill_on_drop: false }`
[INFO] [stdout] 8fac3c8970a59b4c9f17231f18c588d61d765df170ac2c2301bb44d910df4eec
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-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 -Dtail-expr-drop-order" "-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" "+11663cd3bfefef7d34e8f0892c250bf698049392" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] a5032f171b50c02debbb8b4aaacf273ada39d46a9f04a8cabd3a394bd70ce69a
[INFO] running `Command { std: "docker" "start" "-a" "a5032f171b50c02debbb8b4aaacf273ada39d46a9f04a8cabd3a394bd70ce69a", kill_on_drop: false }`
[INFO] [stderr] warning: virtual workspace defaulting to `resolver = "1"` despite one or more workspace members being on edition 2021 which implies `resolver = "2"`
[INFO] [stderr] note: to keep the current resolver, specify `workspace.resolver = "1"` in the workspace root's manifest
[INFO] [stderr] note: to use the edition 2021 resolver, specify `workspace.resolver = "2"` in the workspace root's manifest
[INFO] [stderr] note: for more details see https://doc.rust-lang.org/cargo/reference/resolver.html#resolver-versions
[INFO] [stderr]    Compiling smart_pointers v0.1.0 (/opt/rustwide/workdir/smart_pointers)
[INFO] [stdout] warning: trait `Foo` is never used
[INFO] [stdout]   --> advanced_rust/src/unsafe_rust.rs:68:14
[INFO] [stdout]    |
[INFO] [stdout] 68 | unsafe trait Foo {
[INFO] [stdout]    |              ^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]    Compiling functions v0.1.0 (/opt/rustwide/workdir/functions)
[INFO] [stderr]    Compiling minigrep v0.1.0 (/opt/rustwide/workdir/minigrep)
[INFO] [stderr]    Compiling hello v0.1.0 (/opt/rustwide/workdir/hello)
[INFO] [stderr]    Compiling generics_traits_lifetimes v0.1.0 (/opt/rustwide/workdir/generics_traits_lifetimes)
[INFO] [stderr]    Compiling enums v0.1.0 (/opt/rustwide/workdir/enums)
[INFO] [stderr]    Compiling advanced_rust v0.1.0 (/opt/rustwide/workdir/advanced_rust)
[INFO] [stderr]    Compiling oop v0.1.0 (/opt/rustwide/workdir/oop)
[INFO] [stderr]    Compiling patterns v0.1.0 (/opt/rustwide/workdir/patterns)
[INFO] [stderr]    Compiling concurrency v0.1.0 (/opt/rustwide/workdir/concurrency)
[INFO] [stderr]    Compiling iterators v0.1.0 (/opt/rustwide/workdir/iterators)
[INFO] [stderr]    Compiling guessing_game v0.1.0 (/opt/rustwide/workdir/guessing_game)
[INFO] [stdout] warning: trait `Foo` is never used
[INFO] [stdout]   --> advanced_rust/src/unsafe_rust.rs:68:14
[INFO] [stdout]    |
[INFO] [stdout] 68 | unsafe trait Foo {
[INFO] [stdout]    |              ^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]    Compiling collections v0.1.0 (/opt/rustwide/workdir/collections)
[INFO] [stderr]    Compiling ownership v0.1.0 (/opt/rustwide/workdir/ownership)
[INFO] [stderr]    Compiling closures v0.1.0 (/opt/rustwide/workdir/closures)
[INFO] [stderr]    Compiling rectangles v0.1.0 (/opt/rustwide/workdir/rectangles)
[INFO] [stderr]    Compiling variables v0.1.0 (/opt/rustwide/workdir/variables)
[INFO] [stderr]    Compiling error_handling v0.1.0 (/opt/rustwide/workdir/error_handling)
[INFO] [stderr]    Compiling branches v0.1.0 (/opt/rustwide/workdir/branches)
[INFO] [stderr]     Finished `test` profile [unoptimized + debuginfo] target(s) in 0.32s
[INFO] running `Command { std: "docker" "inspect" "a5032f171b50c02debbb8b4aaacf273ada39d46a9f04a8cabd3a394bd70ce69a", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "a5032f171b50c02debbb8b4aaacf273ada39d46a9f04a8cabd3a394bd70ce69a", kill_on_drop: false }`
[INFO] [stdout] a5032f171b50c02debbb8b4aaacf273ada39d46a9f04a8cabd3a394bd70ce69a