[INFO] fetching crate crostab 0.0.2...
[INFO] checking crostab-0.0.2 against try#cac44d9528e3bbbdaa1537d187bd489ccc5de18c for pr-91141
[INFO] extracting crate crostab 0.0.2 into /workspace/builds/worker-2/source
[INFO] validating manifest of crates.io crate crostab 0.0.2 on toolchain cac44d9528e3bbbdaa1537d187bd489ccc5de18c
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+cac44d9528e3bbbdaa1537d187bd489ccc5de18c" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate crostab 0.0.2
[INFO] finished tweaking crates.io crate crostab 0.0.2
[INFO] tweaked toml for crates.io crate crostab 0.0.2 written to /workspace/builds/worker-2/source/Cargo.toml
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+cac44d9528e3bbbdaa1537d187bd489ccc5de18c" "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" "+cac44d9528e3bbbdaa1537d187bd489ccc5de18c" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded aryth v0.0.9
[INFO] [stderr]   Downloaded texting v0.0.5
[INFO] [stderr]   Downloaded veho v0.0.18
[INFO] [stderr]   Downloaded palett v0.0.6
[INFO] [stderr]   Downloaded spare v0.0.1
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2/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" "+cac44d9528e3bbbdaa1537d187bd489ccc5de18c" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 0cd6f5e2e1f567d13af28a058722b53becc98fe4c6fc72b28e140e72f90a4791
[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" "0cd6f5e2e1f567d13af28a058722b53becc98fe4c6fc72b28e140e72f90a4791", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "0cd6f5e2e1f567d13af28a058722b53becc98fe4c6fc72b28e140e72f90a4791", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "0cd6f5e2e1f567d13af28a058722b53becc98fe4c6fc72b28e140e72f90a4791", kill_on_drop: false }`
[INFO] [stdout] 0cd6f5e2e1f567d13af28a058722b53becc98fe4c6fc72b28e140e72f90a4791
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2/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" "+cac44d9528e3bbbdaa1537d187bd489ccc5de18c" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 66778b575eda48e729e42e9108afdf80e15ea960956bae6ef18ca9d816fdd65d
[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" "66778b575eda48e729e42e9108afdf80e15ea960956bae6ef18ca9d816fdd65d", kill_on_drop: false }`
[INFO] [stderr]     Checking regex-syntax v0.6.25
[INFO] [stderr]     Checking arrayvec v0.5.2
[INFO] [stderr]     Checking utf8parse v0.2.0
[INFO] [stderr]     Checking veho v0.0.18
[INFO] [stderr]    Compiling serde v1.0.130
[INFO] [stderr]    Compiling num-traits v0.2.14
[INFO] [stderr]    Compiling num-integer v0.1.44
[INFO] [stderr]    Compiling num-bigint v0.4.3
[INFO] [stderr]    Compiling num-iter v0.1.42
[INFO] [stderr]    Compiling num-rational v0.4.0
[INFO] [stderr]     Checking aho-corasick v0.7.18
[INFO] [stderr]    Compiling vte_generate_state_changes v0.1.1
[INFO] [stderr]    Compiling serde_derive v1.0.130
[INFO] [stderr]     Checking crostab v0.0.2 (/opt/rustwide/workdir)
[INFO] [stdout] warning: variant is never constructed: `Nul`
[INFO] [stdout]  --> src/types/value.rs:7:5
[INFO] [stdout]   |
[INFO] [stdout] 7 |     Nul,
[INFO] [stdout]   |     ^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant is never constructed: `Boo`
[INFO] [stdout]  --> src/types/value.rs:8:5
[INFO] [stdout]   |
[INFO] [stdout] 8 |     Boo(bool),
[INFO] [stdout]   |     ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant is never constructed: `Num`
[INFO] [stdout]  --> src/types/value.rs:9:5
[INFO] [stdout]   |
[INFO] [stdout] 9 |     Num(i32),
[INFO] [stdout]   |     ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant is never constructed: `Str`
[INFO] [stdout]   --> src/types/value.rs:10:5
[INFO] [stdout]    |
[INFO] [stdout] 10 |     Str(String),
[INFO] [stdout]    |     ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant is never constructed: `Arr`
[INFO] [stdout]   --> src/types/value.rs:11:5
[INFO] [stdout]    |
[INFO] [stdout] 11 |     Arr(Vec<Value>),
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant is never constructed: `Obj`
[INFO] [stdout]   --> src/types/value.rs:12:5
[INFO] [stdout]    |
[INFO] [stdout] 12 |     Obj(HashMap<String, Value>),
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field is never read: `head`
[INFO] [stdout]  --> src/table/table.rs:4:5
[INFO] [stdout]   |
[INFO] [stdout] 4 |     head: Vec<String>,
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field is never read: `rows`
[INFO] [stdout]  --> src/table/table.rs:5:5
[INFO] [stdout]   |
[INFO] [stdout] 5 |     rows: Vec<Vec<T>>,
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `height`
[INFO] [stdout]   --> src/table/table.rs:12:8
[INFO] [stdout]    |
[INFO] [stdout] 12 |     fn height(&self) -> usize { (&self.head).len() }
[INFO] [stdout]    |        ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `width`
[INFO] [stdout]   --> src/table/table.rs:13:8
[INFO] [stdout]    |
[INFO] [stdout] 13 |     fn width(&self) -> usize { (&self.rows).len() }
[INFO] [stdout]    |        ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `coin`
[INFO] [stdout]   --> src/table/table.rs:14:8
[INFO] [stdout]    |
[INFO] [stdout] 14 |     fn coin(&self, head: &str) -> Option<usize> { index_of(&self.head, &head.to_string()) }
[INFO] [stdout]    |        ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `cell`
[INFO] [stdout]   --> src/table/table.rs:15:8
[INFO] [stdout]    |
[INFO] [stdout] 15 |     fn cell(&self, side_index: usize, head_label: &str) -> Option<&T> {
[INFO] [stdout]    |        ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field is never read: `head`
[INFO] [stdout]  --> src/crostab/crostab.rs:4:5
[INFO] [stdout]   |
[INFO] [stdout] 4 |     head: Vec<String>,
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field is never read: `side`
[INFO] [stdout]  --> src/crostab/crostab.rs:5:5
[INFO] [stdout]   |
[INFO] [stdout] 5 |     side: Vec<String>,
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field is never read: `rows`
[INFO] [stdout]  --> src/crostab/crostab.rs:6:5
[INFO] [stdout]   |
[INFO] [stdout] 6 |     rows: Vec<Vec<T>>,
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `height`
[INFO] [stdout]   --> src/crostab/crostab.rs:13:8
[INFO] [stdout]    |
[INFO] [stdout] 13 |     fn height(&self) -> usize { (&self.head).len() }
[INFO] [stdout]    |        ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `width`
[INFO] [stdout]   --> src/crostab/crostab.rs:14:8
[INFO] [stdout]    |
[INFO] [stdout] 14 |     fn width(&self) -> usize { (&self.side).len() }
[INFO] [stdout]    |        ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `roin`
[INFO] [stdout]   --> src/crostab/crostab.rs:15:8
[INFO] [stdout]    |
[INFO] [stdout] 15 |     fn roin(&self, side: &str) -> Option<usize> { index_of(&self.side, &side.to_string()) }
[INFO] [stdout]    |        ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `coin`
[INFO] [stdout]   --> src/crostab/crostab.rs:16:8
[INFO] [stdout]    |
[INFO] [stdout] 16 |     fn coin(&self, head: &str) -> Option<usize> { index_of(&self.head, &head.to_string()) }
[INFO] [stdout]    |        ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `cell`
[INFO] [stdout]   --> src/crostab/crostab.rs:17:8
[INFO] [stdout]    |
[INFO] [stdout] 17 |     fn cell(&self, side: &str, head: &str) -> Option<&T> {
[INFO] [stdout]    |        ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 20 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Checking vte v0.10.1
[INFO] [stderr]     Checking num-complex v0.4.0
[INFO] [stderr]     Checking regex v1.5.4
[INFO] [stderr]     Checking texting v0.0.5
[INFO] [stderr]     Checking num v0.4.0
[INFO] [stderr]     Checking aryth v0.0.9
[INFO] [stderr]     Checking palett v0.0.6
[INFO] [stderr]     Checking spare v0.0.1
[INFO] [stderr]     Checking serde_json v1.0.72
[INFO] [stdout] warning: unused import: `crate::crostab::Crostab`
[INFO] [stdout]   --> src/table/table.rs:29:9
[INFO] [stdout]    |
[INFO] [stdout] 29 |     use crate::crostab::Crostab;
[INFO] [stdout]    |         ^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `side_label`
[INFO] [stdout]   --> src/table/table.rs:45:13
[INFO] [stdout]    |
[INFO] [stdout] 45 |         let side_label = "1984";
[INFO] [stdout]    |             ^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_side_label`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant is never constructed: `Nul`
[INFO] [stdout]  --> src/types/value.rs:7:5
[INFO] [stdout]   |
[INFO] [stdout] 7 |     Nul,
[INFO] [stdout]   |     ^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant is never constructed: `Str`
[INFO] [stdout]   --> src/types/value.rs:10:5
[INFO] [stdout]    |
[INFO] [stdout] 10 |     Str(String),
[INFO] [stdout]    |     ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused imports: `Number`, `Value`
[INFO] [stdout]  --> tests/any/json_basic_test.rs:1:24
[INFO] [stdout]   |
[INFO] [stdout] 1 | use serde_json::{json, Number, Value};
[INFO] [stdout]   |                        ^^^^^^  ^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 4 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 33.61s
[INFO] running `Command { std: "docker" "inspect" "66778b575eda48e729e42e9108afdf80e15ea960956bae6ef18ca9d816fdd65d", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "66778b575eda48e729e42e9108afdf80e15ea960956bae6ef18ca9d816fdd65d", kill_on_drop: false }`
[INFO] [stdout] 66778b575eda48e729e42e9108afdf80e15ea960956bae6ef18ca9d816fdd65d