[INFO] cloning repository https://github.com/MartinLwx/rustlox
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/MartinLwx/rustlox" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FMartinLwx%2Frustlox", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FMartinLwx%2Frustlox'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 50f2a7e88dcc8c771e14d60f62c02d510df2a0b1
[INFO] building MartinLwx/rustlox against master#11663cd3bfefef7d34e8f0892c250bf698049392+rustflags=-Dtail-expr-drop-order for pr-134523
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FMartinLwx%2Frustlox" "/workspace/builds/worker-6-tc1/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-6-tc1/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/MartinLwx/rustlox on toolchain 11663cd3bfefef7d34e8f0892c250bf698049392
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+11663cd3bfefef7d34e8f0892c250bf698049392" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/MartinLwx/rustlox
[INFO] finished tweaking git repo https://github.com/MartinLwx/rustlox
[INFO] tweaked toml for git repo https://github.com/MartinLwx/rustlox written to /workspace/builds/worker-6-tc1/source/Cargo.toml
[INFO] crate git repo https://github.com/MartinLwx/rustlox already has a lockfile, it will not be regenerated
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+11663cd3bfefef7d34e8f0892c250bf698049392" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-tc1/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:f3a9d4ad9d972b27faf3965f35b62e55ba32bbce8f20bc8fe909558a86702fde" "/opt/rustwide/cargo-home/bin/cargo" "+11663cd3bfefef7d34e8f0892c250bf698049392" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 335af1253267824625f75d06b5518f7722fc3f8e482478eeb070f48fcdb122e6
[INFO] running `Command { std: "docker" "start" "-a" "335af1253267824625f75d06b5518f7722fc3f8e482478eeb070f48fcdb122e6", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "335af1253267824625f75d06b5518f7722fc3f8e482478eeb070f48fcdb122e6", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "335af1253267824625f75d06b5518f7722fc3f8e482478eeb070f48fcdb122e6", kill_on_drop: false }`
[INFO] [stdout] 335af1253267824625f75d06b5518f7722fc3f8e482478eeb070f48fcdb122e6
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-tc1/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 -Dtail-expr-drop-order" "-e" "RUSTDOCFLAGS=--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" "ghcr.io/rust-lang/crates-build-env/linux@sha256:f3a9d4ad9d972b27faf3965f35b62e55ba32bbce8f20bc8fe909558a86702fde" "/opt/rustwide/cargo-home/bin/cargo" "+11663cd3bfefef7d34e8f0892c250bf698049392" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] d354dc433479f42ebcae1027e0b95445b82cecb7dd5f5ab9cb40b77423a9573e
[INFO] running `Command { std: "docker" "start" "-a" "d354dc433479f42ebcae1027e0b95445b82cecb7dd5f5ab9cb40b77423a9573e", kill_on_drop: false }`
[INFO] [stderr]    Compiling rustlox v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused import: `Closure`
[INFO] [stdout]  --> src/compiler.rs:4:20
[INFO] [stdout]   |
[INFO] [stdout] 4 | use crate::value::{Closure, Function, FunctionType, Value};
[INFO] [stdout]   |                    ^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: value assigned to `arg` is never read
[INFO] [stdout]    --> src/compiler.rs:940:17
[INFO] [stdout]     |
[INFO] [stdout] 940 |         let mut arg = 0_u8;
[INFO] [stdout]     |                 ^^^
[INFO] [stdout]     |
[INFO] [stdout]     = help: maybe it is overwritten before being read?
[INFO] [stdout]     = note: `#[warn(unused_assignments)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `slot`
[INFO] [stdout]    --> src/vm.rs:233:34
[INFO] [stdout]     |
[INFO] [stdout] 233 |     fn close_upvalues(&mut self, slot: usize) {}
[INFO] [stdout]     |                                  ^^^^ help: if this is intentional, prefix it with an underscore: `_slot`
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function `new` is never used
[INFO] [stdout]    --> src/value.rs:159:12
[INFO] [stdout]     |
[INFO] [stdout] 158 | impl ValueArray {
[INFO] [stdout]     | --------------- associated function in this implementation
[INFO] [stdout] 159 |     pub fn new() -> Self {
[INFO] [stdout]     |            ^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: methods `current_closure` and `close_upvalues` are never used
[INFO] [stdout]    --> src/vm.rs:65:12
[INFO] [stdout]     |
[INFO] [stdout] 49  | impl VM {
[INFO] [stdout]     | ------- methods in this implementation
[INFO] [stdout] ...
[INFO] [stdout] 65  |     pub fn current_closure(&mut self) -> &Closure {
[INFO] [stdout]     |            ^^^^^^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 233 |     fn close_upvalues(&mut self, slot: usize) {}
[INFO] [stdout]     |        ^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 0.36s
[INFO] running `Command { std: "docker" "inspect" "d354dc433479f42ebcae1027e0b95445b82cecb7dd5f5ab9cb40b77423a9573e", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "d354dc433479f42ebcae1027e0b95445b82cecb7dd5f5ab9cb40b77423a9573e", kill_on_drop: false }`
[INFO] [stdout] d354dc433479f42ebcae1027e0b95445b82cecb7dd5f5ab9cb40b77423a9573e
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-tc1/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 -Dtail-expr-drop-order" "-e" "RUSTDOCFLAGS=--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" "ghcr.io/rust-lang/crates-build-env/linux@sha256:f3a9d4ad9d972b27faf3965f35b62e55ba32bbce8f20bc8fe909558a86702fde" "/opt/rustwide/cargo-home/bin/cargo" "+11663cd3bfefef7d34e8f0892c250bf698049392" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 30efb7506dac96a9eb97d7c0dc17aff40bdc6926e4e9f057cfac60fc92926d4f
[INFO] running `Command { std: "docker" "start" "-a" "30efb7506dac96a9eb97d7c0dc17aff40bdc6926e4e9f057cfac60fc92926d4f", kill_on_drop: false }`
[INFO] [stderr]    Compiling rustlox v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused import: `Closure`
[INFO] [stdout]  --> src/compiler.rs:4:20
[INFO] [stdout]   |
[INFO] [stdout] 4 | use crate::value::{Closure, Function, FunctionType, Value};
[INFO] [stdout]   |                    ^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: value assigned to `arg` is never read
[INFO] [stdout]    --> src/compiler.rs:940:17
[INFO] [stdout]     |
[INFO] [stdout] 940 |         let mut arg = 0_u8;
[INFO] [stdout]     |                 ^^^
[INFO] [stdout]     |
[INFO] [stdout]     = help: maybe it is overwritten before being read?
[INFO] [stdout]     = note: `#[warn(unused_assignments)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `slot`
[INFO] [stdout]    --> src/vm.rs:233:34
[INFO] [stdout]     |
[INFO] [stdout] 233 |     fn close_upvalues(&mut self, slot: usize) {}
[INFO] [stdout]     |                                  ^^^^ help: if this is intentional, prefix it with an underscore: `_slot`
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function `new` is never used
[INFO] [stdout]    --> src/value.rs:159:12
[INFO] [stdout]     |
[INFO] [stdout] 158 | impl ValueArray {
[INFO] [stdout]     | --------------- associated function in this implementation
[INFO] [stdout] 159 |     pub fn new() -> Self {
[INFO] [stdout]     |            ^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: methods `current_closure` and `close_upvalues` are never used
[INFO] [stdout]    --> src/vm.rs:65:12
[INFO] [stdout]     |
[INFO] [stdout] 49  | impl VM {
[INFO] [stdout]     | ------- methods in this implementation
[INFO] [stdout] ...
[INFO] [stdout] 65  |     pub fn current_closure(&mut self) -> &Closure {
[INFO] [stdout]     |            ^^^^^^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 233 |     fn close_upvalues(&mut self, slot: usize) {}
[INFO] [stdout]     |        ^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `test` profile [unoptimized + debuginfo] target(s) in 0.21s
[INFO] running `Command { std: "docker" "inspect" "30efb7506dac96a9eb97d7c0dc17aff40bdc6926e4e9f057cfac60fc92926d4f", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "30efb7506dac96a9eb97d7c0dc17aff40bdc6926e4e9f057cfac60fc92926d4f", kill_on_drop: false }`
[INFO] [stdout] 30efb7506dac96a9eb97d7c0dc17aff40bdc6926e4e9f057cfac60fc92926d4f