[INFO] fetching crate nyar_valkyrie 0.0.8...
[INFO] testing nyar_valkyrie-0.0.8 against 1.60.0 for beta-1.61-1
[INFO] extracting crate nyar_valkyrie 0.0.8 into /workspace/builds/worker-21/source
[INFO] validating manifest of crates.io crate nyar_valkyrie 0.0.8 on toolchain 1.60.0
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.60.0" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate nyar_valkyrie 0.0.8
[INFO] finished tweaking crates.io crate nyar_valkyrie 0.0.8
[INFO] tweaked toml for crates.io crate nyar_valkyrie 0.0.8 written to /workspace/builds/worker-21/source/Cargo.toml
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.60.0" "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" "+1.60.0" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-21/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-21/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:b0c94ce3c1162fcb8e57cac5b65ec2f72eabb1eebea4fcc35e269e823f681646" "/opt/rustwide/cargo-home/bin/cargo" "+1.60.0" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] e882958731164f3e178c6dc78e749a619e26113396ef4a785cae010565c69960
[INFO] running `Command { std: "docker" "start" "-a" "e882958731164f3e178c6dc78e749a619e26113396ef4a785cae010565c69960", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "e882958731164f3e178c6dc78e749a619e26113396ef4a785cae010565c69960", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "e882958731164f3e178c6dc78e749a619e26113396ef4a785cae010565c69960", kill_on_drop: false }`
[INFO] [stdout] e882958731164f3e178c6dc78e749a619e26113396ef4a785cae010565c69960
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-21/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-21/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=warn" "-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:b0c94ce3c1162fcb8e57cac5b65ec2f72eabb1eebea4fcc35e269e823f681646" "/opt/rustwide/cargo-home/bin/cargo" "+1.60.0" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] f8264c97958d2a9e5e1746082390655dd0def943d2fc98c51d3374549927a462
[INFO] running `Command { std: "docker" "start" "-a" "f8264c97958d2a9e5e1746082390655dd0def943d2fc98c51d3374549927a462", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]    Compiling syn v1.0.91
[INFO] [stderr]    Compiling ucd-trie v0.1.3
[INFO] [stderr]    Compiling num-traits v0.2.14
[INFO] [stderr]    Compiling num-integer v0.1.44
[INFO] [stderr]    Compiling num-bigint v0.2.6
[INFO] [stderr]    Compiling num-iter v0.1.42
[INFO] [stderr]    Compiling num-complex v0.2.4
[INFO] [stderr]    Compiling num-rational v0.2.4
[INFO] [stderr]    Compiling serde_json v1.0.79
[INFO] [stderr]    Compiling pest v2.1.3
[INFO] [stderr]    Compiling serde_derive v1.0.136
[INFO] [stderr]    Compiling num v0.2.1
[INFO] [stderr]    Compiling nyar_ast v0.0.8
[INFO] [stderr]    Compiling nyar_valkyrie v0.0.8 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused variable: `base`
[INFO] [stdout]    --> src/grammar.rs:402:13
[INFO] [stdout]     |
[INFO] [stdout] 402 |     let mut base = AST::None;
[INFO] [stdout]     |             ^^^^ help: if this is intentional, prefix it with an underscore: `_base`
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `args`
[INFO] [stdout]   --> src/grammar.rs:20:13
[INFO] [stdout]    |
[INFO] [stdout] 20 |         let args = std::env::args();
[INFO] [stdout]    |             ^^^^ help: if this is intentional, prefix it with an underscore: `_args`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]    --> src/grammar.rs:402:9
[INFO] [stdout]     |
[INFO] [stdout] 402 |     let mut base = AST::None;
[INFO] [stdout]     |         ----^^^^
[INFO] [stdout]     |         |
[INFO] [stdout]     |         help: remove this `mut`
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_mut)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field is never read: `refine`
[INFO] [stdout]   --> src/grammar.rs:15:5
[INFO] [stdout]    |
[INFO] [stdout] 15 |     pub refine: bool,
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] note: `Settings` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stdout]   --> src/grammar.rs:13:10
[INFO] [stdout]    |
[INFO] [stdout] 13 | #[derive(Debug)]
[INFO] [stdout]    |          ^^^^^
[INFO] [stdout]    = note: this warning originates in the derive macro `Debug` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `parse_dict`
[INFO] [stdout]    --> src/grammar.rs:225:4
[INFO] [stdout]     |
[INFO] [stdout] 225 | fn parse_dict(pairs: Pair<Rule>) -> AST {
[INFO] [stdout]     |    ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `format_pair`
[INFO] [stdout]  --> src/utils.rs:4:4
[INFO] [stdout]   |
[INFO] [stdout] 4 | fn format_pair(pair: Pair<&str>, indent_level: usize, is_newline: bool) -> String {
[INFO] [stdout]   |    ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the stable release channel
[INFO] [stdout]  --> src/lib.rs:1:12
[INFO] [stdout]   |
[INFO] [stdout] 1 | #![feature(format_args_nl)]
[INFO] [stdout]   |            ^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to previous error; 6 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0554`.
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `nyar_valkyrie` due to 2 previous errors; 6 warnings emitted
[INFO] running `Command { std: "docker" "inspect" "f8264c97958d2a9e5e1746082390655dd0def943d2fc98c51d3374549927a462", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "f8264c97958d2a9e5e1746082390655dd0def943d2fc98c51d3374549927a462", kill_on_drop: false }`
[INFO] [stdout] f8264c97958d2a9e5e1746082390655dd0def943d2fc98c51d3374549927a462