[INFO] fetching crate slippery-iter 0.1.2...
[INFO] testing slippery-iter-0.1.2 against 1.100.0-beta.1+cargoflags=--release for beta-release-1.100-2
[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 1.100.0-beta.1
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+1.100.0-beta.1" "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" "+1.100.0-beta.1" "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" "+1.100.0-beta.1" "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@sha256:77db811e55d90add9212f6832c23229e3de5f1c1f9905e8cb07319ea15df73ac" "sleep" "infinity", kill_on_drop: false }`
[INFO] [stdout] fc45d3019678a9eb46c0e570ebbb6055edbc915cb7b2b8de7bf63a4a60bc173f
[INFO] running `Command { std: "docker" "start" "fc45d3019678a9eb46c0e570ebbb6055edbc915cb7b2b8de7bf63a4a60bc173f", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "fc45d3019678a9eb46c0e570ebbb6055edbc915cb7b2b8de7bf63a4a60bc173f", 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" "fc45d3019678a9eb46c0e570ebbb6055edbc915cb7b2b8de7bf63a4a60bc173f" "/opt/rustwide/cargo-home/bin/cargo" "+1.100.0-beta.1" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "fc45d3019678a9eb46c0e570ebbb6055edbc915cb7b2b8de7bf63a4a60bc173f", 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=warn" "-e" "RUSTDOCFLAGS=--cap-lints=warn" "-w" "/opt/rustwide/workdir" "--user" "0:0" "fc45d3019678a9eb46c0e570ebbb6055edbc915cb7b2b8de7bf63a4a60bc173f" "/opt/rustwide/cargo-home/bin/cargo" "+1.100.0-beta.1" "build" "--frozen" "--message-format=json" "--release", kill_on_drop: false }`
[INFO] [stderr]    Compiling slippery-iter v0.1.2 (/opt/rustwide/workdir)
[INFO] [stdout] error: `box` patterns have been removed (feature `box_patterns`)
[INFO] [stdout]    --> src/lib.rs:306:11
[INFO] [stdout]     |
[INFO] [stdout] 306 |       x @ box [] => {
[INFO] [stdout]     |           ^^^
[INFO] [stdout]     |
[INFO] [stdout]     = help: enable feature `deref_patterns` instead and...
[INFO] [stdout] help: ...if possible just remove keyword `box`...
[INFO] [stdout]     |
[INFO] [stdout] 306 -       x @ box [] => {
[INFO] [stdout] 306 +       x @ [] => {
[INFO] [stdout]     |
[INFO] [stdout] help: ...otherwise replace it with an invocation of macro `deref`
[INFO] [stdout]     |
[INFO] [stdout] 306 -       x @ box [] => {
[INFO] [stdout] 306 +       x @ deref!([]) => {
[INFO] [stdout]     |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: `box` patterns have been removed (feature `box_patterns`)
[INFO] [stdout]    --> src/lib.rs:310:11
[INFO] [stdout]     |
[INFO] [stdout] 310 |       y @ box [..] => action(y),
[INFO] [stdout]     |           ^^^
[INFO] [stdout]     |
[INFO] [stdout]     = help: enable feature `deref_patterns` instead and...
[INFO] [stdout] help: ...if possible just remove keyword `box`...
[INFO] [stdout]     |
[INFO] [stdout] 310 -       y @ box [..] => action(y),
[INFO] [stdout] 310 +       y @ [..] => action(y),
[INFO] [stdout]     |
[INFO] [stdout] help: ...otherwise replace it with an invocation of macro `deref`
[INFO] [stdout]     |
[INFO] [stdout] 310 -       y @ box [..] => action(y),
[INFO] [stdout] 310 +       y @ deref!([..]) => action(y),
[INFO] [stdout]     |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: `box` patterns have been removed (feature `box_patterns`)
[INFO] [stdout]    --> src/lib.rs:417:11
[INFO] [stdout]     |
[INFO] [stdout] 417 |       x @ box [] => {
[INFO] [stdout]     |           ^^^
[INFO] [stdout]     |
[INFO] [stdout]     = help: enable feature `deref_patterns` instead and...
[INFO] [stdout] help: ...if possible just remove keyword `box`...
[INFO] [stdout]     |
[INFO] [stdout] 417 -       x @ box [] => {
[INFO] [stdout] 417 +       x @ [] => {
[INFO] [stdout]     |
[INFO] [stdout] help: ...otherwise replace it with an invocation of macro `deref`
[INFO] [stdout]     |
[INFO] [stdout] 417 -       x @ box [] => {
[INFO] [stdout] 417 +       x @ deref!([]) => {
[INFO] [stdout]     |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: `box` patterns have been removed (feature `box_patterns`)
[INFO] [stdout]    --> src/lib.rs:421:11
[INFO] [stdout]     |
[INFO] [stdout] 421 |       y @ box [..] => action(y),
[INFO] [stdout]     |           ^^^
[INFO] [stdout]     |
[INFO] [stdout]     = help: enable feature `deref_patterns` instead and...
[INFO] [stdout] help: ...if possible just remove keyword `box`...
[INFO] [stdout]     |
[INFO] [stdout] 421 -       y @ box [..] => action(y),
[INFO] [stdout] 421 +       y @ [..] => action(y),
[INFO] [stdout]     |
[INFO] [stdout] help: ...otherwise replace it with an invocation of macro `deref`
[INFO] [stdout]     |
[INFO] [stdout] 421 -       y @ box [..] => action(y),
[INFO] [stdout] 421 +       y @ deref!([..]) => 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 1.100.0
[INFO] [stdout]   = note: superseded by `deref_patterns`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the beta release channel
[INFO] [stdout]  --> src/lib.rs:2:1
[INFO] [stdout]   |
[INFO] [stdout] 2 | #![feature(generic_const_exprs, box_patterns)]
[INFO] [stdout]   | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] Some errors have detailed explanations: E0554, E0557.
[INFO] [stdout] 
[INFO] [stdout] For more information about an error, try `rustc --explain E0554`.
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `slippery-iter` (lib) due to 6 previous errors
[INFO] running `Command { std: "docker" "inspect" "fc45d3019678a9eb46c0e570ebbb6055edbc915cb7b2b8de7bf63a4a60bc173f", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "fc45d3019678a9eb46c0e570ebbb6055edbc915cb7b2b8de7bf63a4a60bc173f", kill_on_drop: false }`
[INFO] [stdout] fc45d3019678a9eb46c0e570ebbb6055edbc915cb7b2b8de7bf63a4a60bc173f
