[INFO] fetching crate slippery-iter 0.1.2...
[INFO] checking slippery-iter-0.1.2 against try#163937523761cc0def32f1ba9ed63fdf65ad3478 for pr-156749
[INFO] extracting crate slippery-iter 0.1.2 into /workspace/builds/worker-4-tc2/source
[INFO] started tweaking crates.io crate slippery-iter 0.1.2
[INFO] finished tweaking crates.io crate slippery-iter 0.1.2
[INFO] tweaked toml for crates.io crate slippery-iter 0.1.2 written to /workspace/builds/worker-4-tc2/source/Cargo.toml
[INFO] validating manifest of crates.io crate slippery-iter 0.1.2 on toolchain 163937523761cc0def32f1ba9ed63fdf65ad3478
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+163937523761cc0def32f1ba9ed63fdf65ad3478" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+163937523761cc0def32f1ba9ed63fdf65ad3478" "generate-lockfile" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+163937523761cc0def32f1ba9ed63fdf65ad3478" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc2/source:/opt/rustwide/workdir:ro,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc2/target:/opt/rustwide/target:rw,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" "-m" "1610612736" "--network" "none" "ghcr.io/rust-lang/crates-build-env/linux@sha256:3e793bdf10248eb2ddbd6b0faebed8155c11b4589982e2893733958d93e8d540" "sleep" "infinity", kill_on_drop: false }`
[INFO] [stdout] 212b6779dce379c59457d2e709b7d20dac1daf058d2bf0cc594697ff06153ddf
[INFO] running `Command { std: "docker" "start" "212b6779dce379c59457d2e709b7d20dac1daf058d2bf0cc594697ff06153ddf", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "exec" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-w" "/opt/rustwide/workdir" "--user" "0:0" "212b6779dce379c59457d2e709b7d20dac1daf058d2bf0cc594697ff06153ddf" "/opt/rustwide/cargo-home/bin/cargo" "+163937523761cc0def32f1ba9ed63fdf65ad3478" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "212b6779dce379c59457d2e709b7d20dac1daf058d2bf0cc594697ff06153ddf", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "exec" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-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" "-w" "/opt/rustwide/workdir" "--user" "0:0" "212b6779dce379c59457d2e709b7d20dac1daf058d2bf0cc594697ff06153ddf" "/opt/rustwide/cargo-home/bin/cargo" "+163937523761cc0def32f1ba9ed63fdf65ad3478" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stderr]     Checking slippery-iter v0.1.2 (/opt/rustwide/workdir)
[INFO] [stdout] error: `box_patterns` have been removed
[INFO] [stdout]    --> src/lib.rs:306:11
[INFO] [stdout]     |
[INFO] [stdout] 306 |       x @ box [] => {
[INFO] [stdout]     |           ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: `box_patterns` have been removed
[INFO] [stdout]    --> src/lib.rs:306:11
[INFO] [stdout]     |
[INFO] [stdout] 306 |       x @ box [] => {
[INFO] [stdout]     |           ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: `box_patterns` have been removed
[INFO] [stdout]    --> src/lib.rs:310:11
[INFO] [stdout]     |
[INFO] [stdout] 310 |       y @ box [..] => action(y),
[INFO] [stdout]     |           ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: `box_patterns` have been removed
[INFO] [stdout]    --> src/lib.rs:310:11
[INFO] [stdout]     |
[INFO] [stdout] 310 |       y @ box [..] => action(y),
[INFO] [stdout]     |           ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: `box_patterns` have been removed
[INFO] [stdout]    --> src/lib.rs:417:11
[INFO] [stdout]     |
[INFO] [stdout] 417 |       x @ box [] => {
[INFO] [stdout]     |           ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: `box_patterns` have been removed
[INFO] [stdout]    --> src/lib.rs:421:11
[INFO] [stdout]     |
[INFO] [stdout] 421 |       y @ box [..] => action(y),
[INFO] [stdout]     |           ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: `box_patterns` have been removed
[INFO] [stdout]    --> src/lib.rs:417:11
[INFO] [stdout]     |
[INFO] [stdout] 417 |       x @ box [] => {
[INFO] [stdout]     |           ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: `box_patterns` have been removed
[INFO] [stdout]    --> src/lib.rs:421:11
[INFO] [stdout]     |
[INFO] [stdout] 421 |       y @ box [..] => action(y),
[INFO] [stdout]     |           ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0557]: feature has been removed
[INFO] [stdout]  --> src/lib.rs:2:33
[INFO] [stdout]   |
[INFO] [stdout] 2 | #![feature(generic_const_exprs, box_patterns)]
[INFO] [stdout]   |                                 ^^^^^^^^^^^^ feature has been removed
[INFO] [stdout]   |
[INFO] [stdout]   = note: removed in CURRENT_RUSTC_VERSION
[INFO] [stdout]   = note: superseded by `deref_patterns`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0557]: feature has been removed
[INFO] [stdout]  --> src/lib.rs:2:33
[INFO] [stdout]   |
[INFO] [stdout] 2 | #![feature(generic_const_exprs, box_patterns)]
[INFO] [stdout]   |                                 ^^^^^^^^^^^^ feature has been removed
[INFO] [stdout]   |
[INFO] [stdout]   = note: removed in CURRENT_RUSTC_VERSION
[INFO] [stdout]   = note: superseded by `deref_patterns`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0557`.
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `slippery-iter` (lib) due to 5 previous errors
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stdout] For more information about this error, try `rustc --explain E0557`.
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `slippery-iter` (lib test) due to 5 previous errors
[INFO] running `Command { std: "docker" "inspect" "212b6779dce379c59457d2e709b7d20dac1daf058d2bf0cc594697ff06153ddf", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "212b6779dce379c59457d2e709b7d20dac1daf058d2bf0cc594697ff06153ddf", kill_on_drop: false }`
[INFO] [stdout] 212b6779dce379c59457d2e709b7d20dac1daf058d2bf0cc594697ff06153ddf