[INFO] fetching crate rant 4.0.0-alpha.3...
[INFO] checking rant-4.0.0-alpha.3 against try#72f88fc4e9458f89516a0b8b0868f3718aec5b47 for pr-74989
[INFO] extracting crate rant 4.0.0-alpha.3 into /workspace/builds/worker-4/source
[INFO] validating manifest of crates.io crate rant 4.0.0-alpha.3 on toolchain 72f88fc4e9458f89516a0b8b0868f3718aec5b47
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+72f88fc4e9458f89516a0b8b0868f3718aec5b47" "read-manifest" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] started tweaking crates.io crate rant 4.0.0-alpha.3
[INFO] finished tweaking crates.io crate rant 4.0.0-alpha.3
[INFO] tweaked toml for crates.io crate rant 4.0.0-alpha.3 written to /workspace/builds/worker-4/source/Cargo.toml
[INFO] crate crates.io crate rant 4.0.0-alpha.3 already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+72f88fc4e9458f89516a0b8b0868f3718aec5b47" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded codemap-diagnostic v0.1.1
[INFO] [stderr]   Downloaded codemap v0.1.3
[INFO] [stderr]   Downloaded embedded-triple v0.1.0
[INFO] [stderr]   Downloaded exitcode v1.1.2
[INFO] [stderr]   Downloaded line-col v0.2.1
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/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" "rustops/crates-build-env@sha256:d92eaeed33fa75130ca1ee6c8a01d1ffb62bac859dfdfb3450e3e5d1c0146529" "/opt/rustwide/cargo-home/bin/cargo" "+72f88fc4e9458f89516a0b8b0868f3718aec5b47" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] [stdout] 2f62307b9f8962255343288012793508f8e6c1447bbe760bee7e687053dec70d
[INFO] running `Command { std: "docker" "start" "-a" "2f62307b9f8962255343288012793508f8e6c1447bbe760bee7e687053dec70d", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "2f62307b9f8962255343288012793508f8e6c1447bbe760bee7e687053dec70d", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "2f62307b9f8962255343288012793508f8e6c1447bbe760bee7e687053dec70d", kill_on_drop: false }`
[INFO] [stdout] 2f62307b9f8962255343288012793508f8e6c1447bbe760bee7e687053dec70d
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/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" "rustops/crates-build-env@sha256:d92eaeed33fa75130ca1ee6c8a01d1ffb62bac859dfdfb3450e3e5d1c0146529" "/opt/rustwide/cargo-home/bin/cargo" "+72f88fc4e9458f89516a0b8b0868f3718aec5b47" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 46d07301f5afe20a45fbd82bc9f9270d1ae65aeb38666eb5cf746952467da19e
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] running `Command { std: "docker" "start" "-a" "46d07301f5afe20a45fbd82bc9f9270d1ae65aeb38666eb5cf746952467da19e", kill_on_drop: false }`
[INFO] [stderr]    Compiling libc v0.2.73
[INFO] [stderr]    Compiling proc-macro2 v1.0.18
[INFO] [stderr]    Compiling getrandom v0.1.14
[INFO] [stderr]    Compiling syn v1.0.33
[INFO] [stderr]    Compiling utf8-ranges v1.0.4
[INFO] [stderr]    Compiling beef v0.4.4
[INFO] [stderr]    Compiling regex-syntax v0.6.18
[INFO] [stderr]     Checking ppv-lite86 v0.2.8
[INFO] [stderr]     Checking smallvec v1.4.2
[INFO] [stderr]     Checking line-col v0.2.1
[INFO] [stderr]     Checking smartstring v0.2.3
[INFO] [stderr]    Compiling quote v1.0.7
[INFO] [stderr]     Checking rand_core v0.5.1
[INFO] [stderr]     Checking rand_chacha v0.2.2
[INFO] [stderr]     Checking rand_xoshiro v0.4.0
[INFO] [stderr]     Checking rand v0.7.3
[INFO] [stderr]    Compiling logos-derive v0.11.5
[INFO] [stderr]     Checking logos v0.11.4
[INFO] [stderr]     Checking rant v4.0.0-alpha.3 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused imports: `RefMut`, `Ref`
[INFO] [stdout]  --> src/value.rs:4:96
[INFO] [stdout]   |
[INFO] [stdout] 4 | use std::{fmt::{Display, Debug}, rc::Rc, ops::{Add, Not, Sub, Neg, Mul, Div, Rem}, cmp, cell::{Ref, RefCell, RefMut}};
[INFO] [stdout]   |                                                                                                ^^^           ^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused imports: `RefMut`, `Ref`
[INFO] [stdout]  --> src/value.rs:4:96
[INFO] [stdout]   |
[INFO] [stdout] 4 | use std::{fmt::{Display, Debug}, rc::Rc, ops::{Add, Not, Sub, Neg, Mul, Div, Rem}, cmp, cell::{Ref, RefCell, RefMut}};
[INFO] [stdout]   |                                                                                                ^^^           ^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unreachable pattern
[INFO] [stdout]    --> src/value.rs:470:7
[INFO] [stdout]     |
[INFO] [stdout] 470 |       _ => false,
[INFO] [stdout]     |       ^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unreachable_patterns)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unreachable pattern
[INFO] [stdout]    --> src/value.rs:470:7
[INFO] [stdout]     |
[INFO] [stdout] 470 |       _ => false,
[INFO] [stdout]     |       ^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unreachable_patterns)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `capture_vars`
[INFO] [stdout]    --> src/runtime.rs:370:15
[INFO] [stdout]     |
[INFO] [stdout] 370 |               capture_vars
[INFO] [stdout]     |               ^^^^^^^^^^^^ help: try ignoring the field: `capture_vars: _`
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `capture_vars`
[INFO] [stdout]    --> src/runtime.rs:398:15
[INFO] [stdout]     |
[INFO] [stdout] 398 |               capture_vars,
[INFO] [stdout]     |               ^^^^^^^^^^^^ help: try ignoring the field: `capture_vars: _`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `value`
[INFO] [stdout]   --> src/runtime/output.rs:33:30
[INFO] [stdout]    |
[INFO] [stdout] 33 |   pub fn write_ws(&mut self, value: &str) {
[INFO] [stdout]    |                              ^^^^^ help: if this is intentional, prefix it with an underscore: `_value`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `capture_vars`
[INFO] [stdout]    --> src/runtime.rs:370:15
[INFO] [stdout]     |
[INFO] [stdout] 370 |               capture_vars
[INFO] [stdout]     |               ^^^^^^^^^^^^ help: try ignoring the field: `capture_vars: _`
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `capture_vars`
[INFO] [stdout]    --> src/runtime.rs:398:15
[INFO] [stdout]     |
[INFO] [stdout] 398 |               capture_vars,
[INFO] [stdout]     |               ^^^^^^^^^^^^ help: try ignoring the field: `capture_vars: _`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `value`
[INFO] [stdout]   --> src/runtime/output.rs:33:30
[INFO] [stdout]    |
[INFO] [stdout] 33 |   pub fn write_ws(&mut self, value: &str) {
[INFO] [stdout]    |                              ^^^^^ help: if this is intentional, prefix it with an underscore: `_value`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 5 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 5 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 34.65s
[INFO] running `Command { std: "docker" "inspect" "46d07301f5afe20a45fbd82bc9f9270d1ae65aeb38666eb5cf746952467da19e", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "46d07301f5afe20a45fbd82bc9f9270d1ae65aeb38666eb5cf746952467da19e", kill_on_drop: false }`
[INFO] [stdout] 46d07301f5afe20a45fbd82bc9f9270d1ae65aeb38666eb5cf746952467da19e
