[INFO] cloning repository https://github.com/Wopple/bookcase-rs
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/Wopple/bookcase-rs" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FWopple%2Fbookcase-rs", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FWopple%2Fbookcase-rs'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] ce12f79a71946ea65b637b34773af863f1c034fd
[INFO] building Wopple/bookcase-rs 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%2FWopple%2Fbookcase-rs" "/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/Wopple/bookcase-rs 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/Wopple/bookcase-rs
[INFO] finished tweaking git repo https://github.com/Wopple/bookcase-rs
[INFO] tweaked toml for git repo https://github.com/Wopple/bookcase-rs written to /workspace/builds/worker-5-tc1/source/Cargo.toml
[INFO] crate git repo https://github.com/Wopple/bookcase-rs 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] [stderr]     Updating crates.io index
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded bookcase_alloc_macros v2.0.0
[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:f3a9d4ad9d972b27faf3965f35b62e55ba32bbce8f20bc8fe909558a86702fde" "/opt/rustwide/cargo-home/bin/cargo" "+11663cd3bfefef7d34e8f0892c250bf698049392" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 1f8ff638d1862c9ca78a28da62d49363e2fb321af54c259a2910352c9beb4067
[INFO] running `Command { std: "docker" "start" "-a" "1f8ff638d1862c9ca78a28da62d49363e2fb321af54c259a2910352c9beb4067", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "1f8ff638d1862c9ca78a28da62d49363e2fb321af54c259a2910352c9beb4067", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "1f8ff638d1862c9ca78a28da62d49363e2fb321af54c259a2910352c9beb4067", kill_on_drop: false }`
[INFO] [stdout] 1f8ff638d1862c9ca78a28da62d49363e2fb321af54c259a2910352c9beb4067
[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 -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] 41de6268fa7286409f86a82b780a00c6c43660c523c077a8bd85887cfa14b62f
[INFO] running `Command { std: "docker" "start" "-a" "41de6268fa7286409f86a82b780a00c6c43660c523c077a8bd85887cfa14b62f", 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 bookcase_alloc_macros v2.0.0
[INFO] [stderr]    Compiling bookcase_alloc_macros v2.0.0 (/opt/rustwide/workdir/bookcase_macros)
[INFO] [stderr]    Compiling bookcase_alloc v0.0.2 (/opt/rustwide/workdir/bookcase)
[INFO] [stdout] error: [bookcase_alloc] 0.0.2 is an experimental version, but stable feature was enabled.
[INFO] [stdout]   --> bookcase/src/lib.rs:10:1
[INFO] [stdout]    |
[INFO] [stdout] 10 | ::bookcase_alloc_macros::assert_release_channel!();
[INFO] [stdout]    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: this error originates in the macro `::bookcase_alloc_macros::assert_release_channel` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: [bookcase_alloc] 0.0.2 is an experimental version, but experimental feature was disabled.
[INFO] [stdout]   --> bookcase/src/lib.rs:10:1
[INFO] [stdout]    |
[INFO] [stdout] 10 | ::bookcase_alloc_macros::assert_release_channel!();
[INFO] [stdout]    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: this error originates in the macro `::bookcase_alloc_macros::assert_release_channel` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `bookcase_alloc` (lib) due to 2 previous errors
[INFO] running `Command { std: "docker" "inspect" "41de6268fa7286409f86a82b780a00c6c43660c523c077a8bd85887cfa14b62f", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "41de6268fa7286409f86a82b780a00c6c43660c523c077a8bd85887cfa14b62f", kill_on_drop: false }`
[INFO] [stdout] 41de6268fa7286409f86a82b780a00c6c43660c523c077a8bd85887cfa14b62f