[INFO] cloning repository https://github.com/trevarj/roxt
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/trevarj/roxt" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Ftrevarj%2Froxt", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Ftrevarj%2Froxt'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 01dba387a9df83688586280d208da54a6b55726f
[INFO] testing trevarj/roxt against 1.60.0 for beta-1.61-1
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Ftrevarj%2Froxt" "/workspace/builds/worker-0/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-0/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/trevarj/roxt 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 git repo https://github.com/trevarj/roxt
[INFO] finished tweaking git repo https://github.com/trevarj/roxt
[INFO] tweaked toml for git repo https://github.com/trevarj/roxt written to /workspace/builds/worker-0/source/Cargo.toml
[INFO] crate git repo https://github.com/trevarj/roxt already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.60.0" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0/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:eaef2f80f755933c374d2ae5edccceec0c1312ceb8a4e0b6404e8ab76561e1e5" "/opt/rustwide/cargo-home/bin/cargo" "+1.60.0" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 8aab2ed2105b78c8b14f1af20057b4a744c4ed4835174da79bab944d732a86f8
[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" "8aab2ed2105b78c8b14f1af20057b4a744c4ed4835174da79bab944d732a86f8", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "8aab2ed2105b78c8b14f1af20057b4a744c4ed4835174da79bab944d732a86f8", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "8aab2ed2105b78c8b14f1af20057b4a744c4ed4835174da79bab944d732a86f8", kill_on_drop: false }`
[INFO] [stdout] 8aab2ed2105b78c8b14f1af20057b4a744c4ed4835174da79bab944d732a86f8
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0/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:eaef2f80f755933c374d2ae5edccceec0c1312ceb8a4e0b6404e8ab76561e1e5" "/opt/rustwide/cargo-home/bin/cargo" "+1.60.0" "build" "--frozen" "--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] 92bc2721cbb477f1c434e1a7d7c0daeb4b42807002866d0a261827ac8de6034c
[INFO] running `Command { std: "docker" "start" "-a" "92bc2721cbb477f1c434e1a7d7c0daeb4b42807002866d0a261827ac8de6034c", kill_on_drop: false }`
[INFO] [stderr]    Compiling syn v1.0.34
[INFO] [stderr]    Compiling argh_shared v0.1.1
[INFO] [stderr]    Compiling anyhow v1.0.31
[INFO] [stderr]    Compiling thiserror-impl v1.0.20
[INFO] [stderr]    Compiling argh_derive v0.1.1
[INFO] [stderr]    Compiling thiserror v1.0.20
[INFO] [stderr]    Compiling argh v0.1.3
[INFO] [stderr]    Compiling roxt v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused import: `super::tokens::TokenType`
[INFO] [stdout]  --> src/interpreter/resolver.rs:2:5
[INFO] [stdout]   |
[INFO] [stdout] 2 | use super::tokens::TokenType;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `InterpretError`
[INFO] [stdout]  --> src/bytecode/main.rs:8:10
[INFO] [stdout]   |
[INFO] [stdout] 8 | use vm::{InterpretError, VM};
[INFO] [stdout]   |          ^^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `std::convert::TryInto`
[INFO] [stdout]  --> src/bytecode/compiler.rs:8:5
[INFO] [stdout]   |
[INFO] [stdout] 8 | use std::convert::TryInto;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `UpValue`
[INFO] [stdout]  --> src/bytecode/vm.rs:4:26
[INFO] [stdout]   |
[INFO] [stdout] 4 |     compiler::{Compiler, UpValue},
[INFO] [stdout]   |                          ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `id`
[INFO] [stdout]    --> src/interpreter/interpreter.rs:180:39
[INFO] [stdout]     |
[INFO] [stdout] 180 |                 if let Atom::Function(id, params, stmt, closure) = callee {
[INFO] [stdout]     |                                       ^^ help: if this is intentional, prefix it with an underscore: `_id`
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `a`
[INFO] [stdout]    --> src/interpreter/interpreter.rs:413:35
[INFO] [stdout]     |
[INFO] [stdout] 413 |                 (Atom::Identifier(a, _), Atom::Identifier(b, _)) => todo!(),
[INFO] [stdout]     |                                   ^ help: if this is intentional, prefix it with an underscore: `_a`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `b`
[INFO] [stdout]    --> src/interpreter/interpreter.rs:413:59
[INFO] [stdout]     |
[INFO] [stdout] 413 |                 (Atom::Identifier(a, _), Atom::Identifier(b, _)) => todo!(),
[INFO] [stdout]     |                                                           ^ help: if this is intentional, prefix it with an underscore: `_b`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `env`
[INFO] [stdout]    --> src/interpreter/interpreter.rs:256:9
[INFO] [stdout]     |
[INFO] [stdout] 256 |         env: &Env,
[INFO] [stdout]     |         ^^^ help: if this is intentional, prefix it with an underscore: `_env`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `op`
[INFO] [stdout]   --> src/interpreter/resolver.rs:76:31
[INFO] [stdout]    |
[INFO] [stdout] 76 |             Expr::Binary(lhs, op, rhs) => {
[INFO] [stdout]    |                               ^^ help: if this is intentional, prefix it with an underscore: `_op`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `op`
[INFO] [stdout]    --> src/interpreter/resolver.rs:136:38
[INFO] [stdout]     |
[INFO] [stdout] 136 |             if let Expr::Binary(lhs, op, rhs) = expr {
[INFO] [stdout]     |                                      ^^ help: if this is intentional, prefix it with an underscore: `_op`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant is never constructed: `UnsupportedAssignment`
[INFO] [stdout]   --> src/interpreter/interpreter.rs:20:5
[INFO] [stdout]    |
[INFO] [stdout] 20 |     UnsupportedAssignment { type_a: String, type_b: String },
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] note: `RuntimeError` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stdout]   --> src/interpreter/interpreter.rs:9:17
[INFO] [stdout]    |
[INFO] [stdout] 9  | #[derive(Error, 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: variant is never constructed: `SyntaxError`
[INFO] [stdout]  --> src/interpreter/parser.rs:9:5
[INFO] [stdout]   |
[INFO] [stdout] 9 |     SyntaxError,
[INFO] [stdout]   |     ^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout] note: `ParseError` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stdout]  --> src/interpreter/parser.rs:6:17
[INFO] [stdout]   |
[INFO] [stdout] 6 | #[derive(Error, Debug, PartialEq)]
[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: variant is never constructed: `UsingVarInOwnInitializer`
[INFO] [stdout]   --> src/interpreter/resolver.rs:13:5
[INFO] [stdout]    |
[INFO] [stdout] 13 |     UsingVarInOwnInitializer { id: String },
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout] note: `ResolverError` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stdout]   --> src/interpreter/resolver.rs:10:17
[INFO] [stdout]    |
[INFO] [stdout] 10 | #[derive(Error, 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] error[E0554]: `#![feature]` may not be used on the stable release channel
[INFO] [stdout]  --> src/interpreter/main.rs:1:12
[INFO] [stdout]   |
[INFO] [stdout] 1 | #![feature(peekable_next_if)]
[INFO] [stdout]   |            ^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the feature `peekable_next_if` has been stable since 1.51.0 and no longer requires an attribute to enable
[INFO] [stdout]  --> src/interpreter/main.rs:1:12
[INFO] [stdout]   |
[INFO] [stdout] 1 | #![feature(peekable_next_if)]
[INFO] [stdout]   |            ^^^^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(stable_features)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to previous error; 11 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 `roxt` due to 2 previous errors; 11 warnings emitted
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stdout] warning: unused variable: `is_captured`
[INFO] [stdout]     --> src/bytecode/compiler.rs:1028:32
[INFO] [stdout]      |
[INFO] [stdout] 1028 |     for (idx, (l_ident, depth, is_captured)) in locals.iter().enumerate().rev() {
[INFO] [stdout]      |                                ^^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_is_captured`
[INFO] [stdout]      |
[INFO] [stdout]      = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `line`
[INFO] [stdout]    --> src/bytecode/compiler.rs:143:47
[INFO] [stdout]     |
[INFO] [stdout] 143 |     fn make_constant(&mut self, value: Value, line: usize) -> Result<usize, CompilerError> {
[INFO] [stdout]     |                                               ^^^^ help: if this is intentional, prefix it with an underscore: `_line`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `is_captured`
[INFO] [stdout]    --> src/bytecode/compiler.rs:340:32
[INFO] [stdout]     |
[INFO] [stdout] 340 |             for (ident, depth, is_captured) in self.state.locals.iter().rev() {
[INFO] [stdout]     |                                ^^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_is_captured`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `is_captured`
[INFO] [stdout]    --> src/bytecode/compiler.rs:387:32
[INFO] [stdout]     |
[INFO] [stdout] 387 |             for (ident, depth, is_captured) in self.state.locals.iter().rev() {
[INFO] [stdout]     |                                ^^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_is_captured`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `line`
[INFO] [stdout]     --> src/bytecode/compiler.rs:1013:13
[INFO] [stdout]      |
[INFO] [stdout] 1013 |         let line = self.peek()?.line();
[INFO] [stdout]      |             ^^^^ help: if this is intentional, prefix it with an underscore: `_line`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field is never read: `class`
[INFO] [stdout]   --> src/bytecode/object.rs:63:5
[INFO] [stdout]    |
[INFO] [stdout] 63 |     class: Rc<ClassObj>,
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] note: `Instance` has derived impls for the traits `Clone` and `Debug`, but these are intentionally ignored during dead code analysis
[INFO] [stdout]   --> src/bytecode/object.rs:61:10
[INFO] [stdout]    |
[INFO] [stdout] 61 | #[derive(Debug, Clone)]
[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: field is never read: `fields`
[INFO] [stdout]   --> src/bytecode/object.rs:64:5
[INFO] [stdout]    |
[INFO] [stdout] 64 |     fields: HashMap<String, Value>,
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout] note: `Instance` has derived impls for the traits `Clone` and `Debug`, but these are intentionally ignored during dead code analysis
[INFO] [stdout]   --> src/bytecode/object.rs:61:10
[INFO] [stdout]    |
[INFO] [stdout] 61 | #[derive(Debug, Clone)]
[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] error[E0554]: `#![feature]` may not be used on the stable release channel
[INFO] [stdout]  --> src/bytecode/main.rs:1:12
[INFO] [stdout]   |
[INFO] [stdout] 1 | #![feature(drain_filter)]
[INFO] [stdout]   |            ^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the stable release channel
[INFO] [stdout]  --> src/bytecode/main.rs:2:12
[INFO] [stdout]   |
[INFO] [stdout] 2 | #![feature(fn_traits)]
[INFO] [stdout]   |            ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to 2 previous errors; 10 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0554`.
[INFO] [stdout] 
[INFO] [stderr] error: build failed
[INFO] running `Command { std: "docker" "inspect" "92bc2721cbb477f1c434e1a7d7c0daeb4b42807002866d0a261827ac8de6034c", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "92bc2721cbb477f1c434e1a7d7c0daeb4b42807002866d0a261827ac8de6034c", kill_on_drop: false }`
[INFO] [stdout] 92bc2721cbb477f1c434e1a7d7c0daeb4b42807002866d0a261827ac8de6034c