[INFO] fetching crate chao 0.1.0...
[INFO] testing chao-0.1.0 against master#a77da2d454e6caa227a85b16410b95f93495e7e0 for pr-91031
[INFO] extracting crate chao 0.1.0 into /workspace/builds/worker-46/source
[INFO] validating manifest of crates.io crate chao 0.1.0 on toolchain a77da2d454e6caa227a85b16410b95f93495e7e0
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+a77da2d454e6caa227a85b16410b95f93495e7e0" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate chao 0.1.0
[INFO] finished tweaking crates.io crate chao 0.1.0
[INFO] tweaked toml for crates.io crate chao 0.1.0 written to /workspace/builds/worker-46/source/Cargo.toml
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+a77da2d454e6caa227a85b16410b95f93495e7e0" "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" "+a77da2d454e6caa227a85b16410b95f93495e7e0" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-46/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-46/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@sha256:5736fa189c1c60b01babf4b8b698fe57b6ecc41933a7ff2e0b8d7a221459412b" "/opt/rustwide/cargo-home/bin/cargo" "+a77da2d454e6caa227a85b16410b95f93495e7e0" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] f89c52da5cff401b3431bf81e9892d409948c3dcd2b14659dc82538d3f8fe1bc
[INFO] running `Command { std: "docker" "start" "-a" "f89c52da5cff401b3431bf81e9892d409948c3dcd2b14659dc82538d3f8fe1bc", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "f89c52da5cff401b3431bf81e9892d409948c3dcd2b14659dc82538d3f8fe1bc", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "f89c52da5cff401b3431bf81e9892d409948c3dcd2b14659dc82538d3f8fe1bc", kill_on_drop: false }`
[INFO] [stdout] f89c52da5cff401b3431bf81e9892d409948c3dcd2b14659dc82538d3f8fe1bc
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-46/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-46/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" "-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@sha256:5736fa189c1c60b01babf4b8b698fe57b6ecc41933a7ff2e0b8d7a221459412b" "/opt/rustwide/cargo-home/bin/cargo" "+a77da2d454e6caa227a85b16410b95f93495e7e0" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] f4a9c1202fc00300ecf44ad73a3f683577d5a723b84f736bd853f37e25ae0d21
[INFO] running `Command { std: "docker" "start" "-a" "f4a9c1202fc00300ecf44ad73a3f683577d5a723b84f736bd853f37e25ae0d21", kill_on_drop: false }`
[INFO] [stderr]    Compiling bitflags v0.4.0
[INFO] [stderr]    Compiling lazy_static v1.4.0
[INFO] [stderr]    Compiling unicode-width v0.1.9
[INFO] [stderr]    Compiling encode_unicode v0.1.3
[INFO] [stderr]    Compiling itertools v0.7.11
[INFO] [stderr]    Compiling atty v0.2.14
[INFO] [stderr]    Compiling combine v3.8.1
[INFO] [stderr]    Compiling nix v0.5.1
[INFO] [stderr]    Compiling colored v1.9.3
[INFO] [stderr]    Compiling rustyline v1.0.0
[INFO] [stderr]    Compiling libchao v0.1.0
[INFO] [stdout] error[E0425]: cannot find value `rest` in this scope
[INFO] [stdout]    --> /opt/rustwide/cargo-home/registry/src/github.com-1ecc6299db9ec823/libchao-0.1.0/src/env.rs:118:20
[INFO] [stdout]     |
[INFO] [stdout] 118 |             [expr, rest..] => match self.eval(expr) {
[INFO] [stdout]     |                    ^^^^ not found in this scope
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0425]: cannot find value `rest` in this scope
[INFO] [stdout]    --> /opt/rustwide/cargo-home/registry/src/github.com-1ecc6299db9ec823/libchao-0.1.0/src/env.rs:122:33
[INFO] [stdout]     |
[INFO] [stdout] 122 |                     for expr in rest.iter() {
[INFO] [stdout]     |                                 ^^^^ not found in this scope
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0425]: cannot find value `rest` in this scope
[INFO] [stdout]    --> /opt/rustwide/cargo-home/registry/src/github.com-1ecc6299db9ec823/libchao-0.1.0/src/env.rs:132:36
[INFO] [stdout]     |
[INFO] [stdout] 132 |                     self.bind_args(rest.to_vec(), arg_names.clone());
[INFO] [stdout]     |                                    ^^^^ not found in this scope
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0425]: cannot find value `tail` in this scope
[INFO] [stdout]    --> /opt/rustwide/cargo-home/registry/src/github.com-1ecc6299db9ec823/libchao-0.1.0/src/env.rs:177:20
[INFO] [stdout]     |
[INFO] [stdout] 177 |             [head, tail..] => tail.iter().fold(head.clone(), |acc, x| acc - x.clone()),
[INFO] [stdout]     |                    ^^^^ not found in this scope
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0425]: cannot find value `tail` in this scope
[INFO] [stdout]    --> /opt/rustwide/cargo-home/registry/src/github.com-1ecc6299db9ec823/libchao-0.1.0/src/env.rs:177:31
[INFO] [stdout]     |
[INFO] [stdout] 177 |             [head, tail..] => tail.iter().fold(head.clone(), |acc, x| acc - x.clone()),
[INFO] [stdout]     |                               ^^^^ not found in this scope
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0425]: cannot find value `tail` in this scope
[INFO] [stdout]    --> /opt/rustwide/cargo-home/registry/src/github.com-1ecc6299db9ec823/libchao-0.1.0/src/env.rs:197:20
[INFO] [stdout]     |
[INFO] [stdout] 197 |             [head, tail..] => tail.iter().fold(head.clone(), |acc, x| acc / x.clone()),
[INFO] [stdout]     |                    ^^^^ not found in this scope
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0425]: cannot find value `tail` in this scope
[INFO] [stdout]    --> /opt/rustwide/cargo-home/registry/src/github.com-1ecc6299db9ec823/libchao-0.1.0/src/env.rs:197:31
[INFO] [stdout]     |
[INFO] [stdout] 197 |             [head, tail..] => tail.iter().fold(head.clone(), |acc, x| acc / x.clone()),
[INFO] [stdout]     |                               ^^^^ not found in this scope
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0425]: cannot find value `tail` in this scope
[INFO] [stdout]    --> /opt/rustwide/cargo-home/registry/src/github.com-1ecc6299db9ec823/libchao-0.1.0/src/env.rs:224:20
[INFO] [stdout]     |
[INFO] [stdout] 224 |             [head, tail..] => Bool(tail.iter().all(|ref x| *x == head)),
[INFO] [stdout]     |                    ^^^^ not found in this scope
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0425]: cannot find value `tail` in this scope
[INFO] [stdout]    --> /opt/rustwide/cargo-home/registry/src/github.com-1ecc6299db9ec823/libchao-0.1.0/src/env.rs:224:36
[INFO] [stdout]     |
[INFO] [stdout] 224 |             [head, tail..] => Bool(tail.iter().all(|ref x| *x == head)),
[INFO] [stdout]     |                                    ^^^^ not found in this scope
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0658]: `X..` patterns in slices are experimental
[INFO] [stdout]    --> /opt/rustwide/cargo-home/registry/src/github.com-1ecc6299db9ec823/libchao-0.1.0/src/env.rs:118:20
[INFO] [stdout]     |
[INFO] [stdout] 118 |             [expr, rest..] => match self.eval(expr) {
[INFO] [stdout]     |                    ^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: see issue #67264 <https://github.com/rust-lang/rust/issues/67264> for more information
[INFO] [stdout]     = help: add `#![feature(half_open_range_patterns)]` to the crate attributes to enable
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0658]: `X..` patterns in slices are experimental
[INFO] [stdout]    --> /opt/rustwide/cargo-home/registry/src/github.com-1ecc6299db9ec823/libchao-0.1.0/src/env.rs:177:20
[INFO] [stdout]     |
[INFO] [stdout] 177 |             [head, tail..] => tail.iter().fold(head.clone(), |acc, x| acc - x.clone()),
[INFO] [stdout]     |                    ^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: see issue #67264 <https://github.com/rust-lang/rust/issues/67264> for more information
[INFO] [stdout]     = help: add `#![feature(half_open_range_patterns)]` to the crate attributes to enable
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0658]: `X..` patterns in slices are experimental
[INFO] [stdout]    --> /opt/rustwide/cargo-home/registry/src/github.com-1ecc6299db9ec823/libchao-0.1.0/src/env.rs:197:20
[INFO] [stdout]     |
[INFO] [stdout] 197 |             [head, tail..] => tail.iter().fold(head.clone(), |acc, x| acc / x.clone()),
[INFO] [stdout]     |                    ^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: see issue #67264 <https://github.com/rust-lang/rust/issues/67264> for more information
[INFO] [stdout]     = help: add `#![feature(half_open_range_patterns)]` to the crate attributes to enable
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0658]: `X..` patterns in slices are experimental
[INFO] [stdout]    --> /opt/rustwide/cargo-home/registry/src/github.com-1ecc6299db9ec823/libchao-0.1.0/src/env.rs:224:20
[INFO] [stdout]     |
[INFO] [stdout] 224 |             [head, tail..] => Bool(tail.iter().all(|ref x| *x == head)),
[INFO] [stdout]     |                    ^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: see issue #67264 <https://github.com/rust-lang/rust/issues/67264> for more information
[INFO] [stdout]     = help: add `#![feature(half_open_range_patterns)]` to the crate attributes to enable
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0029]: only `char` and numeric types are allowed in range patterns
[INFO] [stdout]    --> /opt/rustwide/cargo-home/registry/src/github.com-1ecc6299db9ec823/libchao-0.1.0/src/env.rs:118:20
[INFO] [stdout]     |
[INFO] [stdout] 118 |             [expr, rest..] => match self.eval(expr) {
[INFO] [stdout]     |                    ^^^^ this is of type `[type error]` but it should be `char` or numeric
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0029]: only `char` and numeric types are allowed in range patterns
[INFO] [stdout]    --> /opt/rustwide/cargo-home/registry/src/github.com-1ecc6299db9ec823/libchao-0.1.0/src/env.rs:177:20
[INFO] [stdout]     |
[INFO] [stdout] 177 |             [head, tail..] => tail.iter().fold(head.clone(), |acc, x| acc - x.clone()),
[INFO] [stdout]     |                    ^^^^ this is of type `[type error]` but it should be `char` or numeric
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0029]: only `char` and numeric types are allowed in range patterns
[INFO] [stdout]    --> /opt/rustwide/cargo-home/registry/src/github.com-1ecc6299db9ec823/libchao-0.1.0/src/env.rs:197:20
[INFO] [stdout]     |
[INFO] [stdout] 197 |             [head, tail..] => tail.iter().fold(head.clone(), |acc, x| acc / x.clone()),
[INFO] [stdout]     |                    ^^^^ this is of type `[type error]` but it should be `char` or numeric
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0029]: only `char` and numeric types are allowed in range patterns
[INFO] [stdout]    --> /opt/rustwide/cargo-home/registry/src/github.com-1ecc6299db9ec823/libchao-0.1.0/src/env.rs:224:20
[INFO] [stdout]     |
[INFO] [stdout] 224 |             [head, tail..] => Bool(tail.iter().all(|ref x| *x == head)),
[INFO] [stdout]     |                    ^^^^ this is of type `[type error]` but it should be `char` or numeric
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to 17 previous errors
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] Some errors have detailed explanations: E0029, E0425, E0658.
[INFO] [stdout] 
[INFO] [stdout] For more information about an error, try `rustc --explain E0029`.
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `libchao` due to 18 previous errors
[INFO] running `Command { std: "docker" "inspect" "f4a9c1202fc00300ecf44ad73a3f683577d5a723b84f736bd853f37e25ae0d21", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "f4a9c1202fc00300ecf44ad73a3f683577d5a723b84f736bd853f37e25ae0d21", kill_on_drop: false }`
[INFO] [stdout] f4a9c1202fc00300ecf44ad73a3f683577d5a723b84f736bd853f37e25ae0d21