[INFO] fetching crate rational_deduction 0.0.5...
[INFO] testing rational_deduction-0.0.5 against 1.60.0 for beta-1.61-1
[INFO] extracting crate rational_deduction 0.0.5 into /workspace/builds/worker-27/source
[INFO] validating manifest of crates.io crate rational_deduction 0.0.5 on toolchain 1.60.0
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.60.0" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate rational_deduction 0.0.5
[INFO] finished tweaking crates.io crate rational_deduction 0.0.5
[INFO] tweaked toml for crates.io crate rational_deduction 0.0.5 written to /workspace/builds/worker-27/source/Cargo.toml
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.60.0" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.60.0" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded bitvec v0.21.2
[INFO] [stderr]   Downloaded exprz v0.0.12
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-27/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-27/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:b0c94ce3c1162fcb8e57cac5b65ec2f72eabb1eebea4fcc35e269e823f681646" "/opt/rustwide/cargo-home/bin/cargo" "+1.60.0" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 402b7957307649df45fe86a037caeb6d853f344cd07816924484293d56cd73fc
[INFO] running `Command { std: "docker" "start" "-a" "402b7957307649df45fe86a037caeb6d853f344cd07816924484293d56cd73fc", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "402b7957307649df45fe86a037caeb6d853f344cd07816924484293d56cd73fc", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "402b7957307649df45fe86a037caeb6d853f344cd07816924484293d56cd73fc", kill_on_drop: false }`
[INFO] [stdout] 402b7957307649df45fe86a037caeb6d853f344cd07816924484293d56cd73fc
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-27/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-27/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=warn" "-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:b0c94ce3c1162fcb8e57cac5b65ec2f72eabb1eebea4fcc35e269e823f681646" "/opt/rustwide/cargo-home/bin/cargo" "+1.60.0" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 38be4b7170707f0ef32d2332e59f7a9e81b32a9273143810b2fbd1dec3636e75
[INFO] running `Command { std: "docker" "start" "-a" "38be4b7170707f0ef32d2332e59f7a9e81b32a9273143810b2fbd1dec3636e75", kill_on_drop: false }`
[INFO] [stderr]    Compiling radium v0.6.2
[INFO] [stderr]    Compiling funty v1.2.0
[INFO] [stderr]    Compiling tap v1.0.1
[INFO] [stderr]    Compiling wyz v0.2.0
[INFO] [stderr]    Compiling exprz v0.0.12
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the stable release channel
[INFO] [stdout]  --> /opt/rustwide/cargo-home/registry/src/github.com-1ecc6299db9ec823/exprz-0.0.12/src/lib.rs:4:1
[INFO] [stdout]   |
[INFO] [stdout] 4 | #![feature(generic_associated_types)]
[INFO] [stdout]   | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: missing required bound on `Iter`
[INFO] [stdout]     --> /opt/rustwide/cargo-home/registry/src/github.com-1ecc6299db9ec823/exprz-0.0.12/src/lib.rs:1618:9
[INFO] [stdout]      |
[INFO] [stdout] 1618 | /         type Iter<'t>: Iterator<Item = Self::Item<'t>>
[INFO] [stdout] 1619 | |         where
[INFO] [stdout] 1620 | |             T: 't;
[INFO] [stdout]      | |                  ^ help: add the required where clause: `, Self: 't`
[INFO] [stdout]      | |__________________|
[INFO] [stdout]      | 
[INFO] [stdout]      |
[INFO] [stdout]      = note: this bound is currently required to ensure that impls have maximum flexibility
[INFO] [stdout]      = note: we are soliciting feedback, see issue #87479 <https://github.com/rust-lang/rust/issues/87479> for more information
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: missing required bound on `Item`
[INFO] [stdout]     --> /opt/rustwide/cargo-home/registry/src/github.com-1ecc6299db9ec823/exprz-0.0.12/src/lib.rs:1613:9
[INFO] [stdout]      |
[INFO] [stdout] 1613 | /         type Item<'t>: Borrow<T>
[INFO] [stdout] 1614 | |         where
[INFO] [stdout] 1615 | |             T: 't;
[INFO] [stdout]      | |                  ^ help: add the required where clause: `, Self: 't`
[INFO] [stdout]      | |__________________|
[INFO] [stdout]      | 
[INFO] [stdout]      |
[INFO] [stdout]      = note: this bound is currently required to ensure that impls have maximum flexibility
[INFO] [stdout]      = note: we are soliciting feedback, see issue #87479 <https://github.com/rust-lang/rust/issues/87479> for more information
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: missing required bound on `IterGen`
[INFO] [stdout]     --> /opt/rustwide/cargo-home/registry/src/github.com-1ecc6299db9ec823/exprz-0.0.12/src/lib.rs:1629:9
[INFO] [stdout]      |
[INFO] [stdout] 1629 | /         type IterGen<'t>: IteratorGen<T>
[INFO] [stdout] 1630 | |         where
[INFO] [stdout] 1631 | |             T: 't;
[INFO] [stdout]      | |                  ^ help: add the required where clause: `, Self: 't`
[INFO] [stdout]      | |__________________|
[INFO] [stdout]      | 
[INFO] [stdout]      |
[INFO] [stdout]      = note: this bound is currently required to ensure that impls have maximum flexibility
[INFO] [stdout]      = note: we are soliciting feedback, see issue #87479 <https://github.com/rust-lang/rust/issues/87479> for more information
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to 4 previous errors
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0554`.
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `exprz` due to 5 previous errors
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stderr] error: build failed
[INFO] running `Command { std: "docker" "inspect" "38be4b7170707f0ef32d2332e59f7a9e81b32a9273143810b2fbd1dec3636e75", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "38be4b7170707f0ef32d2332e59f7a9e81b32a9273143810b2fbd1dec3636e75", kill_on_drop: false }`
[INFO] [stdout] 38be4b7170707f0ef32d2332e59f7a9e81b32a9273143810b2fbd1dec3636e75