[INFO] fetching crate rant 4.0.0-alpha.3...
[INFO] checking rant-4.0.0-alpha.3 against master#da897dfb6daa268a965d2d73620316ba56020a19 for pr-76219
[INFO] extracting crate rant 4.0.0-alpha.3 into /workspace/builds/worker-8/source
[INFO] validating manifest of crates.io crate rant 4.0.0-alpha.3 on toolchain da897dfb6daa268a965d2d73620316ba56020a19
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+da897dfb6daa268a965d2d73620316ba56020a19" "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-8/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" "+da897dfb6daa268a965d2d73620316ba56020a19" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-8/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-8/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" "+da897dfb6daa268a965d2d73620316ba56020a19" "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] d4e0d525edaa5fc5a9368dd58ed2d4c4d7cc6e88a16c08a5942fb6fbfa1fae1e
[INFO] running `Command { std: "docker" "start" "-a" "d4e0d525edaa5fc5a9368dd58ed2d4c4d7cc6e88a16c08a5942fb6fbfa1fae1e", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "d4e0d525edaa5fc5a9368dd58ed2d4c4d7cc6e88a16c08a5942fb6fbfa1fae1e", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "d4e0d525edaa5fc5a9368dd58ed2d4c4d7cc6e88a16c08a5942fb6fbfa1fae1e", kill_on_drop: false }`
[INFO] [stdout] d4e0d525edaa5fc5a9368dd58ed2d4c4d7cc6e88a16c08a5942fb6fbfa1fae1e
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-8/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-8/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" "+da897dfb6daa268a965d2d73620316ba56020a19" "check" "--frozen" "--all" "--all-targets" "--message-format=json", 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] 535baf3a3efc7b58613703bf9b4847cf14704a6a39127a8456fd7d8712f84088
[INFO] running `Command { std: "docker" "start" "-a" "535baf3a3efc7b58613703bf9b4847cf14704a6a39127a8456fd7d8712f84088", kill_on_drop: false }`
[INFO] [stderr]    Compiling libc v0.2.73
[INFO] [stderr]    Compiling syn v1.0.33
[INFO] [stderr]    Compiling utf8-ranges v1.0.4
[INFO] [stderr]    Compiling beef v0.4.4
[INFO] [stderr]     Checking ppv-lite86 v0.2.8
[INFO] [stderr]    Compiling fnv v1.0.7
[INFO] [stderr]     Checking line-col v0.2.1
[INFO] [stderr]     Checking assert_matches v1.3.0
[INFO] [stderr]     Checking smartstring v0.2.3
[INFO] [stderr]    Compiling proc-macro2 v1.0.18
[INFO] [stderr]    Compiling quote v1.0.7
[INFO] [stderr]     Checking getrandom v0.1.14
[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: 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: 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: 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 30.29s
[INFO] running `Command { std: "docker" "inspect" "535baf3a3efc7b58613703bf9b4847cf14704a6a39127a8456fd7d8712f84088", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "535baf3a3efc7b58613703bf9b4847cf14704a6a39127a8456fd7d8712f84088", kill_on_drop: false }`
[INFO] [stdout] 535baf3a3efc7b58613703bf9b4847cf14704a6a39127a8456fd7d8712f84088