[INFO] cloning repository https://github.com/MonliH/fluo
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/MonliH/fluo" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FMonliH%2Ffluo", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FMonliH%2Ffluo'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] c325ce5fd9cc1f2ec1d460a2b3c5b593b12a6d61
[INFO] checking MonliH/fluo against master#36ecbc94eb6be90bc38b2d0fdd4bfac3f34d9923 for pr-81863
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FMonliH%2Ffluo" "/workspace/builds/worker-5/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-5/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/MonliH/fluo on toolchain 36ecbc94eb6be90bc38b2d0fdd4bfac3f34d9923
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+36ecbc94eb6be90bc38b2d0fdd4bfac3f34d9923" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/MonliH/fluo
[INFO] finished tweaking git repo https://github.com/MonliH/fluo
[INFO] tweaked toml for git repo https://github.com/MonliH/fluo written to /workspace/builds/worker-5/source/Cargo.toml
[INFO] crate git repo https://github.com/MonliH/fluo already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+36ecbc94eb6be90bc38b2d0fdd4bfac3f34d9923" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-5/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5/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@sha256:21f1ed92105a0ef9b0d27ad8bdeb7f36f9f01ac17fffe3a3f3dc5241fc25d8f4" "/opt/rustwide/cargo-home/bin/cargo" "+36ecbc94eb6be90bc38b2d0fdd4bfac3f34d9923" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 8377ea2740455a0202d4c4bd378cd3e21ff80d6c2390c1f1fb4ef2616b560201
[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" "8377ea2740455a0202d4c4bd378cd3e21ff80d6c2390c1f1fb4ef2616b560201", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "8377ea2740455a0202d4c4bd378cd3e21ff80d6c2390c1f1fb4ef2616b560201", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "8377ea2740455a0202d4c4bd378cd3e21ff80d6c2390c1f1fb4ef2616b560201", kill_on_drop: false }`
[INFO] [stdout] 8377ea2740455a0202d4c4bd378cd3e21ff80d6c2390c1f1fb4ef2616b560201
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-5/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5/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@sha256:21f1ed92105a0ef9b0d27ad8bdeb7f36f9f01ac17fffe3a3f3dc5241fc25d8f4" "/opt/rustwide/cargo-home/bin/cargo" "+36ecbc94eb6be90bc38b2d0fdd4bfac3f34d9923" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] c1f6fb954e1a1b1f6d41d5a875aadb6d31bf47910f86c4e52ddb129bc548741d
[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" "c1f6fb954e1a1b1f6d41d5a875aadb6d31bf47910f86c4e52ddb129bc548741d", kill_on_drop: false }`
[INFO] [stderr]     Checking fluoc v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused imports: `Display`, `self`
[INFO] [stdout]  --> src/diagnostics/error.rs:2:16
[INFO] [stdout]   |
[INFO] [stdout] 2 | use std::fmt::{self, Display};
[INFO] [stdout]   |                ^^^^  ^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `description`
[INFO] [stdout]   --> src/diagnostics/error.rs:13:12
[INFO] [stdout]    |
[INFO] [stdout] 13 |     pub fn description(&self) -> &'static str {
[INFO] [stdout]    |            ^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `name`
[INFO] [stdout]   --> src/diagnostics/error.rs:19:12
[INFO] [stdout]    |
[INFO] [stdout] 19 |     pub fn name(&self) -> &'static str {
[INFO] [stdout]    |            ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant is never constructed: `Warning`
[INFO] [stdout]   --> src/diagnostics/error.rs:29:5
[INFO] [stdout]    |
[INFO] [stdout] 29 |     Warning,
[INFO] [stdout]    |     ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `ty`
[INFO] [stdout]   --> src/diagnostics/error.rs:67:12
[INFO] [stdout]    |
[INFO] [stdout] 67 |     pub fn ty(&self) -> DiagnosticType {
[INFO] [stdout]    |            ^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `new`
[INFO] [stdout]   --> src/diagnostics/source.rs:12:12
[INFO] [stdout]    |
[INFO] [stdout] 12 |     pub fn new() -> Self {
[INFO] [stdout]    |            ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `add_source`
[INFO] [stdout]   --> src/diagnostics/source.rs:20:12
[INFO] [stdout]    |
[INFO] [stdout] 20 |     pub fn add_source(&mut self, source: String) -> SourceId {
[INFO] [stdout]    |            ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `get_source`
[INFO] [stdout]   --> src/diagnostics/source.rs:27:12
[INFO] [stdout]    |
[INFO] [stdout] 27 |     pub fn get_source<'a, 'b>(&'a self, source_id: &'b SourceId) -> Option<&'a str> {
[INFO] [stdout]    |            ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `new`
[INFO] [stdout]   --> src/syntax/lexer.rs:27:8
[INFO] [stdout]    |
[INFO] [stdout] 27 |     fn new(sources: &'s Sources, source_id: SourceId) -> Self {
[INFO] [stdout]    |        ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct is never constructed: `Parser`
[INFO] [stdout]  --> src/syntax/parser.rs:1:12
[INFO] [stdout]   |
[INFO] [stdout] 1 | pub struct Parser {}
[INFO] [stdout]   |            ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant is never constructed: `Float`
[INFO] [stdout]   --> src/syntax/token.rs:10:5
[INFO] [stdout]    |
[INFO] [stdout] 10 |     Float(Str),
[INFO] [stdout]    |     ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant is never constructed: `String`
[INFO] [stdout]   --> src/syntax/token.rs:12:5
[INFO] [stdout]    |
[INFO] [stdout] 12 |     String(Str),
[INFO] [stdout]    |     ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: module `ErrorPrelude` should have a snake case name
[INFO] [stdout]  --> src/diagnostics/mod.rs:6:9
[INFO] [stdout]   |
[INFO] [stdout] 6 | pub mod ErrorPrelude {
[INFO] [stdout]   |         ^^^^^^^^^^^^ help: convert the identifier to snake case: `error_prelude`
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(non_snake_case)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 13 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused imports: `Display`, `self`
[INFO] [stdout]  --> src/diagnostics/error.rs:2:16
[INFO] [stdout]   |
[INFO] [stdout] 2 | use std::fmt::{self, Display};
[INFO] [stdout]   |                ^^^^  ^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct is never constructed: `Parser`
[INFO] [stdout]  --> src/syntax/parser.rs:1:12
[INFO] [stdout]   |
[INFO] [stdout] 1 | pub struct Parser {}
[INFO] [stdout]   |            ^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant is never constructed: `Float`
[INFO] [stdout]   --> src/syntax/token.rs:10:5
[INFO] [stdout]    |
[INFO] [stdout] 10 |     Float(Str),
[INFO] [stdout]    |     ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant is never constructed: `String`
[INFO] [stdout]   --> src/syntax/token.rs:12:5
[INFO] [stdout]    |
[INFO] [stdout] 12 |     String(Str),
[INFO] [stdout]    |     ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: module `ErrorPrelude` should have a snake case name
[INFO] [stdout]  --> src/diagnostics/mod.rs:6:9
[INFO] [stdout]   |
[INFO] [stdout] 6 | pub mod ErrorPrelude {
[INFO] [stdout]   |         ^^^^^^^^^^^^ help: convert the identifier to snake case: `error_prelude`
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(non_snake_case)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 5 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 2.24s
[INFO] running `Command { std: "docker" "inspect" "c1f6fb954e1a1b1f6d41d5a875aadb6d31bf47910f86c4e52ddb129bc548741d", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "c1f6fb954e1a1b1f6d41d5a875aadb6d31bf47910f86c4e52ddb129bc548741d", kill_on_drop: false }`
[INFO] [stdout] c1f6fb954e1a1b1f6d41d5a875aadb6d31bf47910f86c4e52ddb129bc548741d