[INFO] fetching crate latex 0.3.1...
[INFO] checking latex-0.3.1 against master#385fa9d845dd326c6bbfd58c22244215e431948a for never-type-fallback-to-never
[INFO] extracting crate latex 0.3.1 into /workspace/builds/worker-0-tc1/source
[INFO] validating manifest of crates.io crate latex 0.3.1 on toolchain 385fa9d845dd326c6bbfd58c22244215e431948a
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+385fa9d845dd326c6bbfd58c22244215e431948a" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate latex 0.3.1
[INFO] finished tweaking crates.io crate latex 0.3.1
[INFO] tweaked toml for crates.io crate latex 0.3.1 written to /workspace/builds/worker-0-tc1/source/Cargo.toml
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+385fa9d845dd326c6bbfd58c22244215e431948a" "generate-lockfile" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Updating crates.io index
[INFO] [stderr]      Locking 20 packages
[INFO] [stderr]       Adding object v0.32.2 (latest: v0.34.0)
[INFO] [stderr]       Adding syn v1.0.109 (latest: v2.0.58)
[INFO] [stderr]       Adding synstructure v0.12.6 (latest: v0.13.1)
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+385fa9d845dd326c6bbfd58c22244215e431948a" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc1/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@sha256:2788e3201cd34a07e3172128adcd8b3090168a8e3bcc40d7c032b9dda1df7d1c" "/opt/rustwide/cargo-home/bin/cargo" "+385fa9d845dd326c6bbfd58c22244215e431948a" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 369fc8747b705307f29035db879ece0844fee6bbc9aec71dd881d395cb96a1bb
[INFO] running `Command { std: "docker" "start" "-a" "369fc8747b705307f29035db879ece0844fee6bbc9aec71dd881d395cb96a1bb", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "369fc8747b705307f29035db879ece0844fee6bbc9aec71dd881d395cb96a1bb", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "369fc8747b705307f29035db879ece0844fee6bbc9aec71dd881d395cb96a1bb", kill_on_drop: false }`
[INFO] [stdout] 369fc8747b705307f29035db879ece0844fee6bbc9aec71dd881d395cb96a1bb
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc1/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" "RUSTDOCFLAGS=--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@sha256:2788e3201cd34a07e3172128adcd8b3090168a8e3bcc40d7c032b9dda1df7d1c" "/opt/rustwide/cargo-home/bin/cargo" "+385fa9d845dd326c6bbfd58c22244215e431948a" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 4561f37e45d6d035c91c109a80fb903e5c0fcccd2a288fb64d3e7bcb09f89a0b
[INFO] running `Command { std: "docker" "start" "-a" "4561f37e45d6d035c91c109a80fb903e5c0fcccd2a288fb64d3e7bcb09f89a0b", kill_on_drop: false }`
[INFO] [stderr]    Compiling libc v0.2.153
[INFO] [stderr]     Checking memchr v2.7.2
[INFO] [stderr]     Checking object v0.32.2
[INFO] [stderr]     Checking backtrace v0.3.71
[INFO] [stderr]     Checking failure v0.1.8
[INFO] [stderr]     Checking latex v0.3.1 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused import: `Printer`
[INFO] [stdout]  --> src/visitor/mod.rs:5:32
[INFO] [stdout]   |
[INFO] [stdout] 5 | pub use self::printer::{print, Printer};
[INFO] [stdout]   |                                ^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `Align` is imported redundantly
[INFO] [stdout]    --> src/visitor/printer.rs:220:10
[INFO] [stdout]     |
[INFO] [stdout] 219 |     use super::*;
[INFO] [stdout]     |         -------- the item `Align` is already imported here
[INFO] [stdout] 220 |     use {Align, DocumentClass, Equation, ListKind, Paragraph, Section};
[INFO] [stdout]     |          ^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `DocumentClass` is imported redundantly
[INFO] [stdout]    --> src/visitor/printer.rs:220:17
[INFO] [stdout]     |
[INFO] [stdout] 219 |     use super::*;
[INFO] [stdout]     |         -------- the item `DocumentClass` is already imported here
[INFO] [stdout] 220 |     use {Align, DocumentClass, Equation, ListKind, Paragraph, Section};
[INFO] [stdout]     |                 ^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `Equation` is imported redundantly
[INFO] [stdout]    --> src/visitor/printer.rs:220:32
[INFO] [stdout]     |
[INFO] [stdout] 219 |     use super::*;
[INFO] [stdout]     |         -------- the item `Equation` is already imported here
[INFO] [stdout] 220 |     use {Align, DocumentClass, Equation, ListKind, Paragraph, Section};
[INFO] [stdout]     |                                ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `Paragraph` is imported redundantly
[INFO] [stdout]    --> src/visitor/printer.rs:220:52
[INFO] [stdout]     |
[INFO] [stdout] 219 |     use super::*;
[INFO] [stdout]     |         -------- the item `Paragraph` is already imported here
[INFO] [stdout] 220 |     use {Align, DocumentClass, Equation, ListKind, Paragraph, Section};
[INFO] [stdout]     |                                                    ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `Section` is imported redundantly
[INFO] [stdout]    --> src/visitor/printer.rs:220:63
[INFO] [stdout]     |
[INFO] [stdout] 219 |     use super::*;
[INFO] [stdout]     |         -------- the item `Section` is already imported here
[INFO] [stdout] 220 |     use {Align, DocumentClass, Equation, ListKind, Paragraph, Section};
[INFO] [stdout]     |                                                               ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `Printer`
[INFO] [stdout]  --> src/visitor/mod.rs:5:32
[INFO] [stdout]   |
[INFO] [stdout] 5 | pub use self::printer::{print, Printer};
[INFO] [stdout]   |                                ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 6 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 5.47s
[INFO] running `Command { std: "docker" "inspect" "4561f37e45d6d035c91c109a80fb903e5c0fcccd2a288fb64d3e7bcb09f89a0b", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "4561f37e45d6d035c91c109a80fb903e5c0fcccd2a288fb64d3e7bcb09f89a0b", kill_on_drop: false }`
[INFO] [stdout] 4561f37e45d6d035c91c109a80fb903e5c0fcccd2a288fb64d3e7bcb09f89a0b