[INFO] cloning repository https://github.com/luizgrocco/santa-rust
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/luizgrocco/santa-rust" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fluizgrocco%2Fsanta-rust", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fluizgrocco%2Fsanta-rust'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] e1508fb3a29762827522b9f2cd7c458efaf37845
[INFO] building luizgrocco/santa-rust 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%2Fluizgrocco%2Fsanta-rust" "/workspace/builds/worker-4-tc1/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-4-tc1/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/luizgrocco/santa-rust 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/luizgrocco/santa-rust
[INFO] finished tweaking git repo https://github.com/luizgrocco/santa-rust
[INFO] tweaked toml for git repo https://github.com/luizgrocco/santa-rust written to /workspace/builds/worker-4-tc1/source/Cargo.toml
[INFO] crate git repo https://github.com/luizgrocco/santa-rust 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-4-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-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] ae83879bb135f39e80d1282e2c405f17334f59efef8858f2df8ba22c27588997
[INFO] running `Command { std: "docker" "start" "-a" "ae83879bb135f39e80d1282e2c405f17334f59efef8858f2df8ba22c27588997", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "ae83879bb135f39e80d1282e2c405f17334f59efef8858f2df8ba22c27588997", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "ae83879bb135f39e80d1282e2c405f17334f59efef8858f2df8ba22c27588997", kill_on_drop: false }`
[INFO] [stdout] ae83879bb135f39e80d1282e2c405f17334f59efef8858f2df8ba22c27588997
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-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] f3b11949c0f37e6ae961bc4c8b33dbd0d6555e5a9f18bdf2fd6364dc2b7e373c
[INFO] running `Command { std: "docker" "start" "-a" "f3b11949c0f37e6ae961bc4c8b33dbd0d6555e5a9f18bdf2fd6364dc2b7e373c", kill_on_drop: false }`
[INFO] [stderr]    Compiling libc v0.2.140
[INFO] [stderr]    Compiling ppv-lite86 v0.2.17
[INFO] [stderr]    Compiling getrandom v0.2.8
[INFO] [stderr]    Compiling rand_core v0.6.4
[INFO] [stderr]    Compiling rand_chacha v0.3.1
[INFO] [stderr]    Compiling rand v0.8.5
[INFO] [stderr]    Compiling santa-rust v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused variable: `borrowedElf1`
[INFO] [stdout]  --> src/main.rs:7:9
[INFO] [stdout]   |
[INFO] [stdout] 7 |     let borrowedElf1 = &my_elf;
[INFO] [stdout]   |         ^^^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_borrowedElf1`
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `borrowedElf2`
[INFO] [stdout]  --> src/main.rs:8:9
[INFO] [stdout]   |
[INFO] [stdout] 8 |     let borrowedElf2 = &my_elf;
[INFO] [stdout]   |         ^^^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_borrowedElf2`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `elves`
[INFO] [stdout]   --> src/main.rs:10:9
[INFO] [stdout]    |
[INFO] [stdout] 10 |     let elves: Vec<Elf> = (1..=2).map(|id| Elf::new(id)).collect::<Vec<_>>();
[INFO] [stdout]    |         ^^^^^ help: if this is intentional, prefix it with an underscore: `_elves`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: fields `keep_going` and `id` are never read
[INFO] [stdout]  --> src/christmas/elf.rs:6:5
[INFO] [stdout]   |
[INFO] [stdout] 4 | pub struct Elf {
[INFO] [stdout]   |            --- fields in this struct
[INFO] [stdout] 5 |     state: ElfState,
[INFO] [stdout] 6 |     keep_going: bool,
[INFO] [stdout]   |     ^^^^^^^^^^
[INFO] [stdout] 7 |     id: usize,
[INFO] [stdout]   |     ^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant `AtSantasDoor` is never constructed
[INFO] [stdout]   --> src/christmas/elf.rs:13:5
[INFO] [stdout]    |
[INFO] [stdout] 10 | pub enum ElfState {
[INFO] [stdout]    |          -------- variant in this enum
[INFO] [stdout] ...
[INFO] [stdout] 13 |     AtSantasDoor,
[INFO] [stdout]    |     ^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `ElfState` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: methods `terminate` and `report` are never used
[INFO] [stdout]   --> src/christmas/elf.rs:25:12
[INFO] [stdout]    |
[INFO] [stdout] 16 | impl Elf {
[INFO] [stdout]    | -------- methods in this implementation
[INFO] [stdout] ...
[INFO] [stdout] 25 |     pub fn terminate(&mut self) {
[INFO] [stdout]    |            ^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 41 |     pub fn report(self) {
[INFO] [stdout]    |            ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `Reindeer` is never constructed
[INFO] [stdout]  --> src/christmas/reindeer.rs:1:12
[INFO] [stdout]   |
[INFO] [stdout] 1 | pub struct Reindeer {}
[INFO] [stdout]   |            ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `Santa` is never constructed
[INFO] [stdout]  --> src/christmas/santa.rs:1:12
[INFO] [stdout]   |
[INFO] [stdout] 1 | pub struct Santa {
[INFO] [stdout]   |            ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: enum `SantaState` is never used
[INFO] [stdout]  --> src/christmas/santa.rs:6:6
[INFO] [stdout]   |
[INFO] [stdout] 6 | enum SantaState {
[INFO] [stdout]   |      ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable `borrowedElf1` should have a snake case name
[INFO] [stdout]  --> src/main.rs:7:9
[INFO] [stdout]   |
[INFO] [stdout] 7 |     let borrowedElf1 = &my_elf;
[INFO] [stdout]   |         ^^^^^^^^^^^^ help: convert the identifier to snake case: `borrowed_elf1`
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(non_snake_case)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable `borrowedElf2` should have a snake case name
[INFO] [stdout]  --> src/main.rs:8:9
[INFO] [stdout]   |
[INFO] [stdout] 8 |     let borrowedElf2 = &my_elf;
[INFO] [stdout]   |         ^^^^^^^^^^^^ help: convert the identifier to snake case: `borrowed_elf2`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 2.46s
[INFO] running `Command { std: "docker" "inspect" "f3b11949c0f37e6ae961bc4c8b33dbd0d6555e5a9f18bdf2fd6364dc2b7e373c", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "f3b11949c0f37e6ae961bc4c8b33dbd0d6555e5a9f18bdf2fd6364dc2b7e373c", kill_on_drop: false }`
[INFO] [stdout] f3b11949c0f37e6ae961bc4c8b33dbd0d6555e5a9f18bdf2fd6364dc2b7e373c
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-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] 74b3791644aa7ac4d547ccca1360e2f7480962b6d05ae14e3ae322203db4449e
[INFO] running `Command { std: "docker" "start" "-a" "74b3791644aa7ac4d547ccca1360e2f7480962b6d05ae14e3ae322203db4449e", kill_on_drop: false }`
[INFO] [stderr]    Compiling santa-rust v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused variable: `borrowedElf1`
[INFO] [stdout]  --> src/main.rs:7:9
[INFO] [stdout]   |
[INFO] [stdout] 7 |     let borrowedElf1 = &my_elf;
[INFO] [stdout]   |         ^^^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_borrowedElf1`
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `borrowedElf2`
[INFO] [stdout]  --> src/main.rs:8:9
[INFO] [stdout]   |
[INFO] [stdout] 8 |     let borrowedElf2 = &my_elf;
[INFO] [stdout]   |         ^^^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_borrowedElf2`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `elves`
[INFO] [stdout]   --> src/main.rs:10:9
[INFO] [stdout]    |
[INFO] [stdout] 10 |     let elves: Vec<Elf> = (1..=2).map(|id| Elf::new(id)).collect::<Vec<_>>();
[INFO] [stdout]    |         ^^^^^ help: if this is intentional, prefix it with an underscore: `_elves`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: fields `keep_going` and `id` are never read
[INFO] [stdout]  --> src/christmas/elf.rs:6:5
[INFO] [stdout]   |
[INFO] [stdout] 4 | pub struct Elf {
[INFO] [stdout]   |            --- fields in this struct
[INFO] [stdout] 5 |     state: ElfState,
[INFO] [stdout] 6 |     keep_going: bool,
[INFO] [stdout]   |     ^^^^^^^^^^
[INFO] [stdout] 7 |     id: usize,
[INFO] [stdout]   |     ^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant `AtSantasDoor` is never constructed
[INFO] [stdout]   --> src/christmas/elf.rs:13:5
[INFO] [stdout]    |
[INFO] [stdout] 10 | pub enum ElfState {
[INFO] [stdout]    |          -------- variant in this enum
[INFO] [stdout] ...
[INFO] [stdout] 13 |     AtSantasDoor,
[INFO] [stdout]    |     ^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `ElfState` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: methods `terminate` and `report` are never used
[INFO] [stdout]   --> src/christmas/elf.rs:25:12
[INFO] [stdout]    |
[INFO] [stdout] 16 | impl Elf {
[INFO] [stdout]    | -------- methods in this implementation
[INFO] [stdout] ...
[INFO] [stdout] 25 |     pub fn terminate(&mut self) {
[INFO] [stdout]    |            ^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 41 |     pub fn report(self) {
[INFO] [stdout]    |            ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `Reindeer` is never constructed
[INFO] [stdout]  --> src/christmas/reindeer.rs:1:12
[INFO] [stdout]   |
[INFO] [stdout] 1 | pub struct Reindeer {}
[INFO] [stdout]   |            ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `Santa` is never constructed
[INFO] [stdout]  --> src/christmas/santa.rs:1:12
[INFO] [stdout]   |
[INFO] [stdout] 1 | pub struct Santa {
[INFO] [stdout]   |            ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: enum `SantaState` is never used
[INFO] [stdout]  --> src/christmas/santa.rs:6:6
[INFO] [stdout]   |
[INFO] [stdout] 6 | enum SantaState {
[INFO] [stdout]   |      ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable `borrowedElf1` should have a snake case name
[INFO] [stdout]  --> src/main.rs:7:9
[INFO] [stdout]   |
[INFO] [stdout] 7 |     let borrowedElf1 = &my_elf;
[INFO] [stdout]   |         ^^^^^^^^^^^^ help: convert the identifier to snake case: `borrowed_elf1`
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(non_snake_case)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable `borrowedElf2` should have a snake case name
[INFO] [stdout]  --> src/main.rs:8:9
[INFO] [stdout]   |
[INFO] [stdout] 8 |     let borrowedElf2 = &my_elf;
[INFO] [stdout]   |         ^^^^^^^^^^^^ help: convert the identifier to snake case: `borrowed_elf2`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `test` profile [unoptimized + debuginfo] target(s) in 0.20s
[INFO] running `Command { std: "docker" "inspect" "74b3791644aa7ac4d547ccca1360e2f7480962b6d05ae14e3ae322203db4449e", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "74b3791644aa7ac4d547ccca1360e2f7480962b6d05ae14e3ae322203db4449e", kill_on_drop: false }`
[INFO] [stdout] 74b3791644aa7ac4d547ccca1360e2f7480962b6d05ae14e3ae322203db4449e