[INFO] cloning repository https://github.com/arlopurcell/zax
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/arlopurcell/zax" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Farlopurcell%2Fzax", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Farlopurcell%2Fzax'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] c4fc56a21db154dff0f48986cb5d6e150224eb37
[INFO] checking arlopurcell/zax against master#d902752866cbbdb331e3cf28ff6bba86ab0f6c62 for pr-77271
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Farlopurcell%2Fzax" "/workspace/builds/worker-14/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-14/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/arlopurcell/zax on toolchain d902752866cbbdb331e3cf28ff6bba86ab0f6c62
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+d902752866cbbdb331e3cf28ff6bba86ab0f6c62" "read-manifest" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/arlopurcell/zax
[INFO] finished tweaking git repo https://github.com/arlopurcell/zax
[INFO] tweaked toml for git repo https://github.com/arlopurcell/zax written to /workspace/builds/worker-14/source/Cargo.toml
[INFO] crate git repo https://github.com/arlopurcell/zax already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+d902752866cbbdb331e3cf28ff6bba86ab0f6c62" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-14/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-14/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" "+d902752866cbbdb331e3cf28ff6bba86ab0f6c62" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] ade2edb8f2fd94545ffe077dedad1264e7a11f08b92e32f2cb7118c33ed095cd
[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" "ade2edb8f2fd94545ffe077dedad1264e7a11f08b92e32f2cb7118c33ed095cd", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "ade2edb8f2fd94545ffe077dedad1264e7a11f08b92e32f2cb7118c33ed095cd", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "ade2edb8f2fd94545ffe077dedad1264e7a11f08b92e32f2cb7118c33ed095cd", kill_on_drop: false }`
[INFO] [stdout] ade2edb8f2fd94545ffe077dedad1264e7a11f08b92e32f2cb7118c33ed095cd
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-14/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-14/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" "+d902752866cbbdb331e3cf28ff6bba86ab0f6c62" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] b9eb47f1f831143e99500c3636327f28b8fb4f5299edcef30c6fe2cc7d35b9c0
[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" "b9eb47f1f831143e99500c3636327f28b8fb4f5299edcef30c6fe2cc7d35b9c0", kill_on_drop: false }`
[INFO] [stderr]     Checking fnv v1.0.7
[INFO] [stderr]     Checking zax v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused import: `FunctionObj`
[INFO] [stdout]  --> src/heap.rs:4:21
[INFO] [stdout]   |
[INFO] [stdout] 4 | use crate::object::{FunctionObj, ObjType, Object};
[INFO] [stdout]   |                     ^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `FunctionObj`
[INFO] [stdout]  --> src/heap.rs:4:21
[INFO] [stdout]   |
[INFO] [stdout] 4 | use crate::object::{FunctionObj, ObjType, Object};
[INFO] [stdout]   |                     ^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `index`
[INFO] [stdout]    --> src/parser.rs:373:21
[INFO] [stdout]     |
[INFO] [stdout] 373 |             .find(|(index, local)| local.name == name)
[INFO] [stdout]     |                     ^^^^^ help: if this is intentional, prefix it with an underscore: `_index`
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `index`
[INFO] [stdout]    --> src/parser.rs:373:21
[INFO] [stdout]     |
[INFO] [stdout] 373 |             .find(|(index, local)| local.name == name)
[INFO] [stdout]     |                     ^^^^^ help: if this is intentional, prefix it with an underscore: `_index`
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant is never constructed: `Bug`
[INFO] [stdout]  --> src/common.rs:5:5
[INFO] [stdout]   |
[INFO] [stdout] 5 |     Bug,
[INFO] [stdout]   |     ^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant is never constructed: `Function`
[INFO] [stdout]   --> src/object.rs:13:5
[INFO] [stdout]    |
[INFO] [stdout] 13 |     Function(Box<FunctionObj>),
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field is never read: `func_type`
[INFO] [stdout]   --> src/parser.rs:16:5
[INFO] [stdout]    |
[INFO] [stdout] 16 |     func_type: FunctionType,
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant is never constructed: `Function`
[INFO] [stdout]   --> src/parser.rs:25:5
[INFO] [stdout]    |
[INFO] [stdout] 25 |     Function,
[INFO] [stdout]    |     ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant is never constructed: `UnaryLeft`
[INFO] [stdout]    --> src/parser.rs:489:5
[INFO] [stdout]     |
[INFO] [stdout] 489 |     UnaryLeft,
[INFO] [stdout]     |     ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant is never constructed: `CallLeft`
[INFO] [stdout]    --> src/parser.rs:491:5
[INFO] [stdout]     |
[INFO] [stdout] 491 |     CallLeft,
[INFO] [stdout]     |     ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant is never constructed: `CallRight`
[INFO] [stdout]    --> src/parser.rs:492:5
[INFO] [stdout]     |
[INFO] [stdout] 492 |     CallRight,
[INFO] [stdout]     |     ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant is never constructed: `PrimaryLeft`
[INFO] [stdout]    --> src/parser.rs:493:5
[INFO] [stdout]     |
[INFO] [stdout] 493 |     PrimaryLeft,
[INFO] [stdout]     |     ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant is never constructed: `PrimaryRight`
[INFO] [stdout]    --> src/parser.rs:494:5
[INFO] [stdout]     |
[INFO] [stdout] 494 |     PrimaryRight,
[INFO] [stdout]     |     ^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant is never constructed: `Unknown`
[INFO] [stdout]   --> src/type_check.rs:94:5
[INFO] [stdout]    |
[INFO] [stdout] 94 |     Unknown,
[INFO] [stdout]    |     ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant is never constructed: `UnknownFunction`
[INFO] [stdout]   --> src/type_check.rs:95:5
[INFO] [stdout]    |
[INFO] [stdout] 95 |     UnknownFunction(String),
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant is never constructed: `ArgNumber`
[INFO] [stdout]   --> src/type_check.rs:96:5
[INFO] [stdout]    |
[INFO] [stdout] 96 |     ArgNumber(usize, usize),
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant is never constructed: `InvalidFieldRef`
[INFO] [stdout]   --> src/type_check.rs:97:5
[INFO] [stdout]    |
[INFO] [stdout] 97 |     InvalidFieldRef(String),
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant is never constructed: `Any`
[INFO] [stdout]    --> src/type_check.rs:133:5
[INFO] [stdout]     |
[INFO] [stdout] 133 |     Any,
[INFO] [stdout]     |     ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant is never constructed: `Number`
[INFO] [stdout]    --> src/type_check.rs:134:5
[INFO] [stdout]     |
[INFO] [stdout] 134 |     Number,
[INFO] [stdout]     |     ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant is never constructed: `Int`
[INFO] [stdout]    --> src/type_check.rs:135:5
[INFO] [stdout]     |
[INFO] [stdout] 135 |     Int,
[INFO] [stdout]     |     ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant is never constructed: `Float`
[INFO] [stdout]    --> src/type_check.rs:136:5
[INFO] [stdout]     |
[INFO] [stdout] 136 |     Float,
[INFO] [stdout]     |     ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant is never constructed: `Str`
[INFO] [stdout]    --> src/type_check.rs:137:5
[INFO] [stdout]     |
[INFO] [stdout] 137 |     Str,
[INFO] [stdout]     |     ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant is never constructed: `Bool`
[INFO] [stdout]    --> src/type_check.rs:138:5
[INFO] [stdout]     |
[INFO] [stdout] 138 |     Bool,
[INFO] [stdout]     |     ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `chunk_mut`
[INFO] [stdout]   --> src/vm.rs:39:8
[INFO] [stdout]    |
[INFO] [stdout] 39 |     fn chunk_mut(&mut self) -> &mut Chunk {
[INFO] [stdout]    |        ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `increment_ip`
[INFO] [stdout]   --> src/vm.rs:51:8
[INFO] [stdout]    |
[INFO] [stdout] 51 |     fn increment_ip(&mut self) -> () {
[INFO] [stdout]    |        ^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 23 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant is never constructed: `Bug`
[INFO] [stdout]  --> src/common.rs:5:5
[INFO] [stdout]   |
[INFO] [stdout] 5 |     Bug,
[INFO] [stdout]   |     ^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant is never constructed: `Function`
[INFO] [stdout]   --> src/object.rs:13:5
[INFO] [stdout]    |
[INFO] [stdout] 13 |     Function(Box<FunctionObj>),
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field is never read: `func_type`
[INFO] [stdout]   --> src/parser.rs:16:5
[INFO] [stdout]    |
[INFO] [stdout] 16 |     func_type: FunctionType,
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant is never constructed: `Function`
[INFO] [stdout]   --> src/parser.rs:25:5
[INFO] [stdout]    |
[INFO] [stdout] 25 |     Function,
[INFO] [stdout]    |     ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant is never constructed: `UnaryLeft`
[INFO] [stdout]    --> src/parser.rs:489:5
[INFO] [stdout]     |
[INFO] [stdout] 489 |     UnaryLeft,
[INFO] [stdout]     |     ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant is never constructed: `CallLeft`
[INFO] [stdout]    --> src/parser.rs:491:5
[INFO] [stdout]     |
[INFO] [stdout] 491 |     CallLeft,
[INFO] [stdout]     |     ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant is never constructed: `CallRight`
[INFO] [stdout]    --> src/parser.rs:492:5
[INFO] [stdout]     |
[INFO] [stdout] 492 |     CallRight,
[INFO] [stdout]     |     ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant is never constructed: `PrimaryLeft`
[INFO] [stdout]    --> src/parser.rs:493:5
[INFO] [stdout]     |
[INFO] [stdout] 493 |     PrimaryLeft,
[INFO] [stdout]     |     ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant is never constructed: `PrimaryRight`
[INFO] [stdout]    --> src/parser.rs:494:5
[INFO] [stdout]     |
[INFO] [stdout] 494 |     PrimaryRight,
[INFO] [stdout]     |     ^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant is never constructed: `Unknown`
[INFO] [stdout]   --> src/type_check.rs:94:5
[INFO] [stdout]    |
[INFO] [stdout] 94 |     Unknown,
[INFO] [stdout]    |     ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant is never constructed: `UnknownFunction`
[INFO] [stdout]   --> src/type_check.rs:95:5
[INFO] [stdout]    |
[INFO] [stdout] 95 |     UnknownFunction(String),
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant is never constructed: `ArgNumber`
[INFO] [stdout]   --> src/type_check.rs:96:5
[INFO] [stdout]    |
[INFO] [stdout] 96 |     ArgNumber(usize, usize),
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant is never constructed: `InvalidFieldRef`
[INFO] [stdout]   --> src/type_check.rs:97:5
[INFO] [stdout]    |
[INFO] [stdout] 97 |     InvalidFieldRef(String),
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant is never constructed: `Any`
[INFO] [stdout]    --> src/type_check.rs:133:5
[INFO] [stdout]     |
[INFO] [stdout] 133 |     Any,
[INFO] [stdout]     |     ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant is never constructed: `Number`
[INFO] [stdout]    --> src/type_check.rs:134:5
[INFO] [stdout]     |
[INFO] [stdout] 134 |     Number,
[INFO] [stdout]     |     ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant is never constructed: `Int`
[INFO] [stdout]    --> src/type_check.rs:135:5
[INFO] [stdout]     |
[INFO] [stdout] 135 |     Int,
[INFO] [stdout]     |     ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant is never constructed: `Float`
[INFO] [stdout]    --> src/type_check.rs:136:5
[INFO] [stdout]     |
[INFO] [stdout] 136 |     Float,
[INFO] [stdout]     |     ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant is never constructed: `Str`
[INFO] [stdout]    --> src/type_check.rs:137:5
[INFO] [stdout]     |
[INFO] [stdout] 137 |     Str,
[INFO] [stdout]     |     ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant is never constructed: `Bool`
[INFO] [stdout]    --> src/type_check.rs:138:5
[INFO] [stdout]     |
[INFO] [stdout] 138 |     Bool,
[INFO] [stdout]     |     ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `chunk_mut`
[INFO] [stdout]   --> src/vm.rs:39:8
[INFO] [stdout]    |
[INFO] [stdout] 39 |     fn chunk_mut(&mut self) -> &mut Chunk {
[INFO] [stdout]    |        ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `increment_ip`
[INFO] [stdout]   --> src/vm.rs:51:8
[INFO] [stdout]    |
[INFO] [stdout] 51 |     fn increment_ip(&mut self) -> () {
[INFO] [stdout]    |        ^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 23 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 2.37s
[INFO] running `Command { std: "docker" "inspect" "b9eb47f1f831143e99500c3636327f28b8fb4f5299edcef30c6fe2cc7d35b9c0", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "b9eb47f1f831143e99500c3636327f28b8fb4f5299edcef30c6fe2cc7d35b9c0", kill_on_drop: false }`
[INFO] [stdout] b9eb47f1f831143e99500c3636327f28b8fb4f5299edcef30c6fe2cc7d35b9c0