[INFO] cloning repository https://github.com/Verdex/silica
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/Verdex/silica" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FVerdex%2Fsilica", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FVerdex%2Fsilica'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 45fb246c5a48a8613ae29376a7d0d892fe5595ab
[INFO] checking Verdex/silica against try#cac44d9528e3bbbdaa1537d187bd489ccc5de18c for pr-91141
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FVerdex%2Fsilica" "/workspace/builds/worker-12/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-12/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/Verdex/silica 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 git repo https://github.com/Verdex/silica
[INFO] finished tweaking git repo https://github.com/Verdex/silica
[INFO] tweaked toml for git repo https://github.com/Verdex/silica written to /workspace/builds/worker-12/source/Cargo.toml
[INFO] crate git repo https://github.com/Verdex/silica already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+cac44d9528e3bbbdaa1537d187bd489ccc5de18c" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-12/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-12/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] f89aad899db6d9f7d3583c4dc08ac677a931fa72ff458d667240e099867583c4
[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" "f89aad899db6d9f7d3583c4dc08ac677a931fa72ff458d667240e099867583c4", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "f89aad899db6d9f7d3583c4dc08ac677a931fa72ff458d667240e099867583c4", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "f89aad899db6d9f7d3583c4dc08ac677a931fa72ff458d667240e099867583c4", kill_on_drop: false }`
[INFO] [stdout] f89aad899db6d9f7d3583c4dc08ac677a931fa72ff458d667240e099867583c4
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-12/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-12/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] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] [stdout] 3c9b94bf97e134493e693bbb434882d805906cdc3484329ac01da97e18ce6bc8
[INFO] running `Command { std: "docker" "start" "-a" "3c9b94bf97e134493e693bbb434882d805906cdc3484329ac01da97e18ce6bc8", kill_on_drop: false }`
[INFO] [stderr]     Checking silica v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: variant is never constructed: `RParen`
[INFO] [stdout]  --> src/parsing/lexeme.rs:5:5
[INFO] [stdout]   |
[INFO] [stdout] 5 |     RParen,
[INFO] [stdout]   |     ^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant is never constructed: `LParen`
[INFO] [stdout]  --> src/parsing/lexeme.rs:6:5
[INFO] [stdout]   |
[INFO] [stdout] 6 |     LParen,
[INFO] [stdout]   |     ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant is never constructed: `RAngle`
[INFO] [stdout]  --> src/parsing/lexeme.rs:7:5
[INFO] [stdout]   |
[INFO] [stdout] 7 |     RAngle,
[INFO] [stdout]   |     ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant is never constructed: `LAngle`
[INFO] [stdout]  --> src/parsing/lexeme.rs:8:5
[INFO] [stdout]   |
[INFO] [stdout] 8 |     LAngle,
[INFO] [stdout]   |     ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant is never constructed: `RCurl`
[INFO] [stdout]  --> src/parsing/lexeme.rs:9:5
[INFO] [stdout]   |
[INFO] [stdout] 9 |     RCurl,
[INFO] [stdout]   |     ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant is never constructed: `LCurl`
[INFO] [stdout]   --> src/parsing/lexeme.rs:10:5
[INFO] [stdout]    |
[INFO] [stdout] 10 |     LCurl,
[INFO] [stdout]    |     ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant is never constructed: `RightDoubleArrow`
[INFO] [stdout]   --> src/parsing/lexeme.rs:11:5
[INFO] [stdout]    |
[INFO] [stdout] 11 |     RightDoubleArrow,
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant is never constructed: `OrBar`
[INFO] [stdout]   --> src/parsing/lexeme.rs:12:5
[INFO] [stdout]    |
[INFO] [stdout] 12 |     OrBar,
[INFO] [stdout]    |     ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant is never constructed: `Fun`
[INFO] [stdout]   --> src/parsing/lexeme.rs:13:5
[INFO] [stdout]    |
[INFO] [stdout] 13 |     Fun,
[INFO] [stdout]    |     ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant is never constructed: `Let`
[INFO] [stdout]   --> src/parsing/lexeme.rs:14:5
[INFO] [stdout]    |
[INFO] [stdout] 14 |     Let,
[INFO] [stdout]    |     ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant is never constructed: `Data`
[INFO] [stdout]   --> src/parsing/lexeme.rs:15:5
[INFO] [stdout]    |
[INFO] [stdout] 15 |     Data,
[INFO] [stdout]    |     ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant is never constructed: `Spec`
[INFO] [stdout]   --> src/parsing/lexeme.rs:16:5
[INFO] [stdout]    |
[INFO] [stdout] 16 |     Spec,
[INFO] [stdout]    |     ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant is never constructed: `SemiColon`
[INFO] [stdout]   --> src/parsing/lexeme.rs:17:5
[INFO] [stdout]    |
[INFO] [stdout] 17 |     SemiColon,
[INFO] [stdout]    |     ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant is never constructed: `Comma`
[INFO] [stdout]   --> src/parsing/lexeme.rs:18:5
[INFO] [stdout]    |
[INFO] [stdout] 18 |     Comma,
[INFO] [stdout]    |     ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant is never constructed: `Equal`
[INFO] [stdout]   --> src/parsing/lexeme.rs:19:5
[INFO] [stdout]    |
[INFO] [stdout] 19 |     Equal,
[INFO] [stdout]    |     ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `start_index`
[INFO] [stdout]   --> src/parsing/lexeme.rs:29:12
[INFO] [stdout]    |
[INFO] [stdout] 29 |     pub fn start_index(&self) -> usize {
[INFO] [stdout]    |            ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `end_index`
[INFO] [stdout]   --> src/parsing/lexeme.rs:33:12
[INFO] [stdout]    |
[INFO] [stdout] 33 |     pub fn end_index(&self) -> usize {
[INFO] [stdout]    |            ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `lex`
[INFO] [stdout]  --> src/parsing/lex.rs:8:8
[INFO] [stdout]   |
[INFO] [stdout] 8 | pub fn lex(s : &str) -> Result<Vec<Lexeme>, usize> {
[INFO] [stdout]   |        ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: enum is never used: `Ast`
[INFO] [stdout]  --> src/parsing/ast.rs:2:10
[INFO] [stdout]   |
[INFO] [stdout] 2 | pub enum Ast {
[INFO] [stdout]   |          ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant is never constructed: `RParen`
[INFO] [stdout]  --> src/parsing/lexeme.rs:5:5
[INFO] [stdout]   |
[INFO] [stdout] 5 |     RParen,
[INFO] [stdout]   |     ^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant is never constructed: `LParen`
[INFO] [stdout]  --> src/parsing/lexeme.rs:6:5
[INFO] [stdout]   |
[INFO] [stdout] 6 |     LParen,
[INFO] [stdout]   |     ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant is never constructed: `RAngle`
[INFO] [stdout]  --> src/parsing/lexeme.rs:7:5
[INFO] [stdout]   |
[INFO] [stdout] 7 |     RAngle,
[INFO] [stdout]   |     ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant is never constructed: `LAngle`
[INFO] [stdout]  --> src/parsing/lexeme.rs:8:5
[INFO] [stdout]   |
[INFO] [stdout] 8 |     LAngle,
[INFO] [stdout]   |     ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant is never constructed: `RCurl`
[INFO] [stdout]  --> src/parsing/lexeme.rs:9:5
[INFO] [stdout]   |
[INFO] [stdout] 9 |     RCurl,
[INFO] [stdout]   |     ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant is never constructed: `LCurl`
[INFO] [stdout]   --> src/parsing/lexeme.rs:10:5
[INFO] [stdout]    |
[INFO] [stdout] 10 |     LCurl,
[INFO] [stdout]    |     ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant is never constructed: `RightDoubleArrow`
[INFO] [stdout]   --> src/parsing/lexeme.rs:11:5
[INFO] [stdout]    |
[INFO] [stdout] 11 |     RightDoubleArrow,
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant is never constructed: `OrBar`
[INFO] [stdout]   --> src/parsing/lexeme.rs:12:5
[INFO] [stdout]    |
[INFO] [stdout] 12 |     OrBar,
[INFO] [stdout]    |     ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant is never constructed: `Fun`
[INFO] [stdout]   --> src/parsing/lexeme.rs:13:5
[INFO] [stdout]    |
[INFO] [stdout] 13 |     Fun,
[INFO] [stdout]    |     ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant is never constructed: `Let`
[INFO] [stdout]   --> src/parsing/lexeme.rs:14:5
[INFO] [stdout]    |
[INFO] [stdout] 14 |     Let,
[INFO] [stdout]    |     ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant is never constructed: `Data`
[INFO] [stdout]   --> src/parsing/lexeme.rs:15:5
[INFO] [stdout]    |
[INFO] [stdout] 15 |     Data,
[INFO] [stdout]    |     ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant is never constructed: `Spec`
[INFO] [stdout]   --> src/parsing/lexeme.rs:16:5
[INFO] [stdout]    |
[INFO] [stdout] 16 |     Spec,
[INFO] [stdout]    |     ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant is never constructed: `SemiColon`
[INFO] [stdout]   --> src/parsing/lexeme.rs:17:5
[INFO] [stdout]    |
[INFO] [stdout] 17 |     SemiColon,
[INFO] [stdout]    |     ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant is never constructed: `Comma`
[INFO] [stdout]   --> src/parsing/lexeme.rs:18:5
[INFO] [stdout]    |
[INFO] [stdout] 18 |     Comma,
[INFO] [stdout]    |     ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant is never constructed: `Equal`
[INFO] [stdout]   --> src/parsing/lexeme.rs:19:5
[INFO] [stdout]    |
[INFO] [stdout] 19 |     Equal,
[INFO] [stdout]    |     ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `start_index`
[INFO] [stdout]   --> src/parsing/lexeme.rs:29:12
[INFO] [stdout]    |
[INFO] [stdout] 29 |     pub fn start_index(&self) -> usize {
[INFO] [stdout]    |            ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `end_index`
[INFO] [stdout]   --> src/parsing/lexeme.rs:33:12
[INFO] [stdout]    |
[INFO] [stdout] 33 |     pub fn end_index(&self) -> usize {
[INFO] [stdout]    |            ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `lex`
[INFO] [stdout]  --> src/parsing/lex.rs:8:8
[INFO] [stdout]   |
[INFO] [stdout] 8 | pub fn lex(s : &str) -> Result<Vec<Lexeme>, usize> {
[INFO] [stdout]   |        ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: enum is never used: `Ast`
[INFO] [stdout]  --> src/parsing/ast.rs:2:10
[INFO] [stdout]   |
[INFO] [stdout] 2 | pub enum Ast {
[INFO] [stdout]   |          ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 19 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 19 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.83s
[INFO] running `Command { std: "docker" "inspect" "3c9b94bf97e134493e693bbb434882d805906cdc3484329ac01da97e18ce6bc8", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "3c9b94bf97e134493e693bbb434882d805906cdc3484329ac01da97e18ce6bc8", kill_on_drop: false }`
[INFO] [stdout] 3c9b94bf97e134493e693bbb434882d805906cdc3484329ac01da97e18ce6bc8