[INFO] fetching crate rual-core 0.0.4...
[INFO] checking rual-core-0.0.4 against try#894d32a5432c6a6461bb2aac7c3d5f2e87dce83f for pr-77015
[INFO] extracting crate rual-core 0.0.4 into /workspace/builds/worker-1/source
[INFO] validating manifest of crates.io crate rual-core 0.0.4 on toolchain 894d32a5432c6a6461bb2aac7c3d5f2e87dce83f
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+894d32a5432c6a6461bb2aac7c3d5f2e87dce83f" "read-manifest" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] started tweaking crates.io crate rual-core 0.0.4
[INFO] finished tweaking crates.io crate rual-core 0.0.4
[INFO] tweaked toml for crates.io crate rual-core 0.0.4 written to /workspace/builds/worker-1/source/Cargo.toml
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+894d32a5432c6a6461bb2aac7c3d5f2e87dce83f" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update", kill_on_drop: false }`
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+894d32a5432c6a6461bb2aac7c3d5f2e87dce83f" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1/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:d92eaeed33fa75130ca1ee6c8a01d1ffb62bac859dfdfb3450e3e5d1c0146529" "/opt/rustwide/cargo-home/bin/cargo" "+894d32a5432c6a6461bb2aac7c3d5f2e87dce83f" "metadata" "--no-deps" "--format-version=1", 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] f43c10e0ceee6ca8ee2b38419858f2ecb5ea57d22115391fd44dfed23fc65ec4
[INFO] running `Command { std: "docker" "start" "-a" "f43c10e0ceee6ca8ee2b38419858f2ecb5ea57d22115391fd44dfed23fc65ec4", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "f43c10e0ceee6ca8ee2b38419858f2ecb5ea57d22115391fd44dfed23fc65ec4", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "f43c10e0ceee6ca8ee2b38419858f2ecb5ea57d22115391fd44dfed23fc65ec4", kill_on_drop: false }`
[INFO] [stdout] f43c10e0ceee6ca8ee2b38419858f2ecb5ea57d22115391fd44dfed23fc65ec4
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1/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:d92eaeed33fa75130ca1ee6c8a01d1ffb62bac859dfdfb3450e3e5d1c0146529" "/opt/rustwide/cargo-home/bin/cargo" "+894d32a5432c6a6461bb2aac7c3d5f2e87dce83f" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] faecace893445ca2e816cd08ebf7a77cc5e84a60c31b640c92462e63044537b9
[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" "faecace893445ca2e816cd08ebf7a77cc5e84a60c31b640c92462e63044537b9", kill_on_drop: false }`
[INFO] [stderr]     Checking rual-core v0.0.4 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused import: `Punct`
[INFO] [stdout]  --> src/lexing/mod.rs:3:30
[INFO] [stdout]   |
[INFO] [stdout] 3 | use crate::syntax::{Keyword, Punct, Token, TokenType};
[INFO] [stdout]   |                              ^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused imports: `Expr`, `Value`, `lexing::Lexer`, `parsing::Parser`, `syntax::Punct`
[INFO] [stdout]  --> src/vm/mod.rs:2:19
[INFO] [stdout]   |
[INFO] [stdout] 2 |     expressions::{Expr, Value},
[INFO] [stdout]   |                   ^^^^  ^^^^^
[INFO] [stdout] 3 |     lexing::Lexer,
[INFO] [stdout]   |     ^^^^^^^^^^^^^
[INFO] [stdout] 4 |     parsing::Parser,
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^
[INFO] [stdout] 5 |     syntax::Punct,
[INFO] [stdout]   |     ^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `BTreeSet`
[INFO] [stdout]  --> src/vm/mod.rs:8:29
[INFO] [stdout]   |
[INFO] [stdout] 8 |     collections::{BTreeMap, BTreeSet},
[INFO] [stdout]   |                             ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused imports: `Expr`, `Value`, `lexing::Lexer`, `parsing::Parser`, `syntax::Punct`
[INFO] [stdout]  --> src/vm/mod.rs:2:19
[INFO] [stdout]   |
[INFO] [stdout] 2 |     expressions::{Expr, Value},
[INFO] [stdout]   |                   ^^^^  ^^^^^
[INFO] [stdout] 3 |     lexing::Lexer,
[INFO] [stdout]   |     ^^^^^^^^^^^^^
[INFO] [stdout] 4 |     parsing::Parser,
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^
[INFO] [stdout] 5 |     syntax::Punct,
[INFO] [stdout]   |     ^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `BTreeSet`
[INFO] [stdout]  --> src/vm/mod.rs:8:29
[INFO] [stdout]   |
[INFO] [stdout] 8 |     collections::{BTreeMap, BTreeSet},
[INFO] [stdout]   |                             ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unreachable pattern
[INFO] [stdout]    --> src/vm/mod.rs:208:17
[INFO] [stdout]     |
[INFO] [stdout] 208 |                 _ => unimplemented!("{:?}", &instr),
[INFO] [stdout]     |                 ^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unreachable_patterns)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant is never constructed: `Unit`
[INFO] [stdout]   --> src/vm/mod.rs:20:5
[INFO] [stdout]    |
[INFO] [stdout] 20 |     Unit,
[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: `new`
[INFO] [stdout]   --> src/vm/mod.rs:66:12
[INFO] [stdout]    |
[INFO] [stdout] 66 |     pub fn new(parent: &'t Scope) -> Self {
[INFO] [stdout]    |            ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `init`
[INFO] [stdout]   --> src/vm/mod.rs:70:8
[INFO] [stdout]    |
[INFO] [stdout] 70 |     fn init(parent: Option<&'t Scope>) -> Self {
[INFO] [stdout]    |        ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `empty`
[INFO] [stdout]   --> src/vm/mod.rs:77:12
[INFO] [stdout]    |
[INFO] [stdout] 77 |     pub fn empty() -> Self {
[INFO] [stdout]    |            ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `lookup_num`
[INFO] [stdout]    --> src/vm/mod.rs:110:12
[INFO] [stdout]     |
[INFO] [stdout] 110 |     pub fn lookup_num(&self, ident: &str) -> Option<i32> {
[INFO] [stdout]     |            ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `lookup_str`
[INFO] [stdout]    --> src/vm/mod.rs:117:12
[INFO] [stdout]     |
[INFO] [stdout] 117 |     pub fn lookup_str(&self, ident: &str) -> Option<String> {
[INFO] [stdout]     |            ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `lookup_list`
[INFO] [stdout]    --> src/vm/mod.rs:124:12
[INFO] [stdout]     |
[INFO] [stdout] 124 |     pub fn lookup_list(&self, ident: &str) -> Option<Vec<i32>> {
[INFO] [stdout]     |            ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unreachable pattern
[INFO] [stdout]    --> src/vm/mod.rs:208:17
[INFO] [stdout]     |
[INFO] [stdout] 208 |                 _ => unimplemented!("{:?}", &instr),
[INFO] [stdout]     |                 ^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unreachable_patterns)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 11 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant is never constructed: `Unit`
[INFO] [stdout]   --> src/vm/mod.rs:20:5
[INFO] [stdout]    |
[INFO] [stdout] 20 |     Unit,
[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: `new`
[INFO] [stdout]   --> src/vm/mod.rs:66:12
[INFO] [stdout]    |
[INFO] [stdout] 66 |     pub fn new(parent: &'t Scope) -> Self {
[INFO] [stdout]    |            ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `init`
[INFO] [stdout]   --> src/vm/mod.rs:70:8
[INFO] [stdout]    |
[INFO] [stdout] 70 |     fn init(parent: Option<&'t Scope>) -> Self {
[INFO] [stdout]    |        ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `empty`
[INFO] [stdout]   --> src/vm/mod.rs:77:12
[INFO] [stdout]    |
[INFO] [stdout] 77 |     pub fn empty() -> Self {
[INFO] [stdout]    |            ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 7 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 1.10s
[INFO] running `Command { std: "docker" "inspect" "faecace893445ca2e816cd08ebf7a77cc5e84a60c31b640c92462e63044537b9", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "faecace893445ca2e816cd08ebf7a77cc5e84a60c31b640c92462e63044537b9", kill_on_drop: false }`
[INFO] [stdout] faecace893445ca2e816cd08ebf7a77cc5e84a60c31b640c92462e63044537b9