[INFO] cloning repository https://github.com/sigurdvaa/monkeylang-rs
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/sigurdvaa/monkeylang-rs" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fsigurdvaa%2Fmonkeylang-rs", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fsigurdvaa%2Fmonkeylang-rs'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] c9d8fba66561224a7c77d7be1ef51a2ad0019f48
[INFO] building sigurdvaa/monkeylang-rs 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%2Fsigurdvaa%2Fmonkeylang-rs" "/workspace/builds/worker-3-tc1/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-3-tc1/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/sigurdvaa/monkeylang-rs 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/sigurdvaa/monkeylang-rs
[INFO] finished tweaking git repo https://github.com/sigurdvaa/monkeylang-rs
[INFO] tweaked toml for git repo https://github.com/sigurdvaa/monkeylang-rs written to /workspace/builds/worker-3-tc1/source/Cargo.toml
[INFO] crate git repo https://github.com/sigurdvaa/monkeylang-rs 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] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-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] ea6686b956b1d5f5736be5e9876d8177779455bfdc0d77c53a26f7b9eb4e0874
[INFO] running `Command { std: "docker" "start" "-a" "ea6686b956b1d5f5736be5e9876d8177779455bfdc0d77c53a26f7b9eb4e0874", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "ea6686b956b1d5f5736be5e9876d8177779455bfdc0d77c53a26f7b9eb4e0874", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "ea6686b956b1d5f5736be5e9876d8177779455bfdc0d77c53a26f7b9eb4e0874", kill_on_drop: false }`
[INFO] [stdout] ea6686b956b1d5f5736be5e9876d8177779455bfdc0d77c53a26f7b9eb4e0874
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-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] 8c1fa10dc097e7ca47a9476b0ceccc3774e74b2665e889812d39a2b2832f3887
[INFO] running `Command { std: "docker" "start" "-a" "8c1fa10dc097e7ca47a9476b0ceccc3774e74b2665e889812d39a2b2832f3887", kill_on_drop: false }`
[INFO] [stderr]    Compiling monkeylang-rs v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused variable: `expr`
[INFO] [stdout]   --> src/compiler/mod.rs:21:20
[INFO] [stdout]    |
[INFO] [stdout] 21 |     pub fn compile(expr: &Expression) {
[INFO] [stdout]    |                    ^^^^ help: if this is intentional, prefix it with an underscore: `_expr`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: type alias `Instructions` is never used
[INFO] [stdout]  --> src/code/mod.rs:1:10
[INFO] [stdout]   |
[INFO] [stdout] 1 | pub type Instructions = Vec<u8>;
[INFO] [stdout]   |          ^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: type alias `OpcodeType` is never used
[INFO] [stdout]  --> src/code/mod.rs:2:10
[INFO] [stdout]   |
[INFO] [stdout] 2 | pub type OpcodeType = u8;
[INFO] [stdout]   |          ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `Definition` is never constructed
[INFO] [stdout]  --> src/code/mod.rs:4:12
[INFO] [stdout]   |
[INFO] [stdout] 4 | pub struct Definition {
[INFO] [stdout]   |            ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: enum `Opcode` is never used
[INFO] [stdout]   --> src/code/mod.rs:10:10
[INFO] [stdout]    |
[INFO] [stdout] 10 | pub enum Opcode {
[INFO] [stdout]    |          ^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `Opcode` has derived impls for the traits `Clone` and `Debug`, but these are intentionally ignored during dead code analysis
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: constant `DEFINITIONS` is never used
[INFO] [stdout]   --> src/code/mod.rs:15:7
[INFO] [stdout]    |
[INFO] [stdout] 15 | const DEFINITIONS: &[&Definition; Opcode::EnumLength as usize] = &[&Definition {
[INFO] [stdout]    |       ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `make` is never used
[INFO] [stdout]   --> src/code/mod.rs:35:8
[INFO] [stdout]    |
[INFO] [stdout] 35 | pub fn make(opcode: Opcode, operands: &[u16]) -> Instructions {
[INFO] [stdout]    |        ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `Bytecode` is never constructed
[INFO] [stdout]  --> src/compiler/mod.rs:5:8
[INFO] [stdout]   |
[INFO] [stdout] 5 | struct Bytecode {
[INFO] [stdout]   |        ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `Compiler` is never constructed
[INFO] [stdout]   --> src/compiler/mod.rs:11:8
[INFO] [stdout]    |
[INFO] [stdout] 11 | struct Compiler {
[INFO] [stdout]    |        ^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `Compiler` has a derived impl for the trait `Default`, but this is intentionally ignored during dead code analysis
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated items `new`, `compile`, and `bytecode` are never used
[INFO] [stdout]   --> src/compiler/mod.rs:17:12
[INFO] [stdout]    |
[INFO] [stdout] 16 | impl Compiler {
[INFO] [stdout]    | ------------- associated items in this implementation
[INFO] [stdout] 17 |     pub fn new() -> Self {
[INFO] [stdout]    |            ^^^
[INFO] [stdout] ...
[INFO] [stdout] 21 |     pub fn compile(expr: &Expression) {
[INFO] [stdout]    |            ^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 25 |     pub fn bytecode(&self) -> Bytecode {
[INFO] [stdout]    |            ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 1.26s
[INFO] running `Command { std: "docker" "inspect" "8c1fa10dc097e7ca47a9476b0ceccc3774e74b2665e889812d39a2b2832f3887", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "8c1fa10dc097e7ca47a9476b0ceccc3774e74b2665e889812d39a2b2832f3887", kill_on_drop: false }`
[INFO] [stdout] 8c1fa10dc097e7ca47a9476b0ceccc3774e74b2665e889812d39a2b2832f3887
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-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] 0d7b8b3f13819113c9d5c41444354f767efe1d46c6c58f7829526a5e19525f65
[INFO] running `Command { std: "docker" "start" "-a" "0d7b8b3f13819113c9d5c41444354f767efe1d46c6c58f7829526a5e19525f65", kill_on_drop: false }`
[INFO] [stderr]    Compiling monkeylang-rs v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused variable: `expr`
[INFO] [stdout]   --> src/compiler/mod.rs:21:20
[INFO] [stdout]    |
[INFO] [stdout] 21 |     pub fn compile(expr: &Expression) {
[INFO] [stdout]    |                    ^^^^ help: if this is intentional, prefix it with an underscore: `_expr`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `opcode` is never read
[INFO] [stdout]  --> src/code/mod.rs:5:5
[INFO] [stdout]   |
[INFO] [stdout] 4 | pub struct Definition {
[INFO] [stdout]   |            ---------- field in this struct
[INFO] [stdout] 5 |     opcode: Opcode,
[INFO] [stdout]   |     ^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `Bytecode` is never constructed
[INFO] [stdout]  --> src/compiler/mod.rs:5:8
[INFO] [stdout]   |
[INFO] [stdout] 5 | struct Bytecode {
[INFO] [stdout]   |        ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `Compiler` is never constructed
[INFO] [stdout]   --> src/compiler/mod.rs:11:8
[INFO] [stdout]    |
[INFO] [stdout] 11 | struct Compiler {
[INFO] [stdout]    |        ^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `Compiler` has a derived impl for the trait `Default`, but this is intentionally ignored during dead code analysis
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated items `new`, `compile`, and `bytecode` are never used
[INFO] [stdout]   --> src/compiler/mod.rs:17:12
[INFO] [stdout]    |
[INFO] [stdout] 16 | impl Compiler {
[INFO] [stdout]    | ------------- associated items in this implementation
[INFO] [stdout] 17 |     pub fn new() -> Self {
[INFO] [stdout]    |            ^^^
[INFO] [stdout] ...
[INFO] [stdout] 21 |     pub fn compile(expr: &Expression) {
[INFO] [stdout]    |            ^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 25 |     pub fn bytecode(&self) -> Bytecode {
[INFO] [stdout]    |            ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `test` profile [unoptimized + debuginfo] target(s) in 2.10s
[INFO] running `Command { std: "docker" "inspect" "0d7b8b3f13819113c9d5c41444354f767efe1d46c6c58f7829526a5e19525f65", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "0d7b8b3f13819113c9d5c41444354f767efe1d46c6c58f7829526a5e19525f65", kill_on_drop: false }`
[INFO] [stdout] 0d7b8b3f13819113c9d5c41444354f767efe1d46c6c58f7829526a5e19525f65