[INFO] cloning repository https://github.com/charlie-sans/Cube
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/charlie-sans/Cube" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fcharlie-sans%2FCube", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fcharlie-sans%2FCube'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] d9a856059d9ed89b41b308f70c86bc998b750713
[INFO] building charlie-sans/Cube 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%2Fcharlie-sans%2FCube" "/workspace/builds/worker-7-tc1/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-7-tc1/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/charlie-sans/Cube 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/charlie-sans/Cube
[INFO] finished tweaking git repo https://github.com/charlie-sans/Cube
[INFO] tweaked toml for git repo https://github.com/charlie-sans/Cube written to /workspace/builds/worker-7-tc1/source/Cargo.toml
[INFO] crate git repo https://github.com/charlie-sans/Cube 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-7-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-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] d12428e457b9ab14d0ab66367fb97d17c695d86a7eeb4d26bebc7df0839cc1e9
[INFO] running `Command { std: "docker" "start" "-a" "d12428e457b9ab14d0ab66367fb97d17c695d86a7eeb4d26bebc7df0839cc1e9", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "d12428e457b9ab14d0ab66367fb97d17c695d86a7eeb4d26bebc7df0839cc1e9", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "d12428e457b9ab14d0ab66367fb97d17c695d86a7eeb4d26bebc7df0839cc1e9", kill_on_drop: false }`
[INFO] [stdout] d12428e457b9ab14d0ab66367fb97d17c695d86a7eeb4d26bebc7df0839cc1e9
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-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] fedd38a8a2efadcca7c220e1ffbf5a21978524cf82a59f171651b52d13c71bb8
[INFO] running `Command { std: "docker" "start" "-a" "fedd38a8a2efadcca7c220e1ffbf5a21978524cf82a59f171651b52d13c71bb8", kill_on_drop: false }`
[INFO] [stderr]    Compiling Cube v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused variable: `first_char`
[INFO] [stdout]   --> src/lexer.rs:52:35
[INFO] [stdout]    |
[INFO] [stdout] 52 |     fn read_identifier(&mut self, first_char: char) -> String {
[INFO] [stdout]    |                                   ^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_first_char`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `first_char`
[INFO] [stdout]   --> src/lexer.rs:69:31
[INFO] [stdout]    |
[INFO] [stdout] 69 |     fn read_number(&mut self, first_char: char) -> Token {
[INFO] [stdout]    |                               ^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_first_char`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `first_char`
[INFO] [stdout]   --> src/parser.rs:21:35
[INFO] [stdout]    |
[INFO] [stdout] 21 |     fn read_identifier(&mut self, first_char: char) -> String {
[INFO] [stdout]    |                                   ^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_first_char`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `first_char`
[INFO] [stdout]   --> src/parser.rs:37:35
[INFO] [stdout]    |
[INFO] [stdout] 37 |         fn read_number(&mut self, first_char: char) -> Token {
[INFO] [stdout]    |                                   ^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_first_char`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `first_char`
[INFO] [stdout]   --> src/parser.rs:52:31
[INFO] [stdout]    |
[INFO] [stdout] 52 |     fn read_string(&mut self, first_char: char) -> Token {
[INFO] [stdout]    |                               ^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_first_char`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `first`
[INFO] [stdout]   --> src/token.rs:66:35
[INFO] [stdout]    |
[INFO] [stdout] 66 |     fn read_identifier(&mut self, first: char) -> String {
[INFO] [stdout]    |                                   ^^^^^ help: if this is intentional, prefix it with an underscore: `_first`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `i`
[INFO] [stdout]    --> src/token.rs:120:28
[INFO] [stdout]     |
[INFO] [stdout] 120 |             Token::Integer(i) => &binding,
[INFO] [stdout]     |                            ^ help: if this is intentional, prefix it with an underscore: `_i`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `f`
[INFO] [stdout]    --> src/token.rs:121:27
[INFO] [stdout]     |
[INFO] [stdout] 121 |             Token::CFloat(f) => &binding,
[INFO] [stdout]     |                           ^ help: if this is intentional, prefix it with an underscore: `_f`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: value assigned to `file` is never read
[INFO] [stdout]   --> src/main.rs:21:13
[INFO] [stdout]    |
[INFO] [stdout] 21 |     let mut file = String::new();
[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: function `print_s` is never used
[INFO] [stdout]   --> src/main.rs:13:4
[INFO] [stdout]    |
[INFO] [stdout] 13 | fn print_s(msg: &str, i: i32) {
[INFO] [stdout]    |    ^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `print_s_token` is never used
[INFO] [stdout]   --> src/main.rs:16:4
[INFO] [stdout]    |
[INFO] [stdout] 16 | fn print_s_token(msg: &str, token: Token) {
[INFO] [stdout]    |    ^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function `new` is never used
[INFO] [stdout]   --> src/parser.rs:15:12
[INFO] [stdout]    |
[INFO] [stdout] 14 | impl<'a> Parser<'a> {
[INFO] [stdout]    | ------------------- associated function in this implementation
[INFO] [stdout] 15 |     pub fn new(input: &'a str) -> Self {
[INFO] [stdout]    |            ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `input` is never read
[INFO] [stdout]   --> src/token.rs:55:5
[INFO] [stdout]    |
[INFO] [stdout] 54 | pub struct Tokenizer<'a> {
[INFO] [stdout]    |            --------- field in this struct
[INFO] [stdout] 55 |     input: Peekable<Chars<'a>>,
[INFO] [stdout]    |     ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: method `read_identifier` is never used
[INFO] [stdout]   --> src/token.rs:66:8
[INFO] [stdout]    |
[INFO] [stdout] 59 | impl<'a> Tokenizer<'a> {
[INFO] [stdout]    | ---------------------- method in this implementation
[INFO] [stdout] ...
[INFO] [stdout] 66 |     fn read_identifier(&mut self, first: char) -> String {
[INFO] [stdout]    |        ^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 0.21s
[INFO] running `Command { std: "docker" "inspect" "fedd38a8a2efadcca7c220e1ffbf5a21978524cf82a59f171651b52d13c71bb8", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "fedd38a8a2efadcca7c220e1ffbf5a21978524cf82a59f171651b52d13c71bb8", kill_on_drop: false }`
[INFO] [stdout] fedd38a8a2efadcca7c220e1ffbf5a21978524cf82a59f171651b52d13c71bb8
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-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] 415c4a53d990d3d84ece16efd073e8b98b2a1bc0efe26e4b58ec4ad2e1497bb9
[INFO] running `Command { std: "docker" "start" "-a" "415c4a53d990d3d84ece16efd073e8b98b2a1bc0efe26e4b58ec4ad2e1497bb9", kill_on_drop: false }`
[INFO] [stderr]    Compiling Cube v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused variable: `first_char`
[INFO] [stdout]   --> src/lexer.rs:52:35
[INFO] [stdout]    |
[INFO] [stdout] 52 |     fn read_identifier(&mut self, first_char: char) -> String {
[INFO] [stdout]    |                                   ^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_first_char`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `first_char`
[INFO] [stdout]   --> src/lexer.rs:69:31
[INFO] [stdout]    |
[INFO] [stdout] 69 |     fn read_number(&mut self, first_char: char) -> Token {
[INFO] [stdout]    |                               ^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_first_char`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `first_char`
[INFO] [stdout]   --> src/parser.rs:21:35
[INFO] [stdout]    |
[INFO] [stdout] 21 |     fn read_identifier(&mut self, first_char: char) -> String {
[INFO] [stdout]    |                                   ^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_first_char`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `first_char`
[INFO] [stdout]   --> src/parser.rs:37:35
[INFO] [stdout]    |
[INFO] [stdout] 37 |         fn read_number(&mut self, first_char: char) -> Token {
[INFO] [stdout]    |                                   ^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_first_char`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `first_char`
[INFO] [stdout]   --> src/parser.rs:52:31
[INFO] [stdout]    |
[INFO] [stdout] 52 |     fn read_string(&mut self, first_char: char) -> Token {
[INFO] [stdout]    |                               ^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_first_char`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `first`
[INFO] [stdout]   --> src/token.rs:66:35
[INFO] [stdout]    |
[INFO] [stdout] 66 |     fn read_identifier(&mut self, first: char) -> String {
[INFO] [stdout]    |                                   ^^^^^ help: if this is intentional, prefix it with an underscore: `_first`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `i`
[INFO] [stdout]    --> src/token.rs:120:28
[INFO] [stdout]     |
[INFO] [stdout] 120 |             Token::Integer(i) => &binding,
[INFO] [stdout]     |                            ^ help: if this is intentional, prefix it with an underscore: `_i`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `f`
[INFO] [stdout]    --> src/token.rs:121:27
[INFO] [stdout]     |
[INFO] [stdout] 121 |             Token::CFloat(f) => &binding,
[INFO] [stdout]     |                           ^ help: if this is intentional, prefix it with an underscore: `_f`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: value assigned to `file` is never read
[INFO] [stdout]   --> src/main.rs:21:13
[INFO] [stdout]    |
[INFO] [stdout] 21 |     let mut file = String::new();
[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: function `print_s` is never used
[INFO] [stdout]   --> src/main.rs:13:4
[INFO] [stdout]    |
[INFO] [stdout] 13 | fn print_s(msg: &str, i: i32) {
[INFO] [stdout]    |    ^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `print_s_token` is never used
[INFO] [stdout]   --> src/main.rs:16:4
[INFO] [stdout]    |
[INFO] [stdout] 16 | fn print_s_token(msg: &str, token: Token) {
[INFO] [stdout]    |    ^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function `new` is never used
[INFO] [stdout]   --> src/parser.rs:15:12
[INFO] [stdout]    |
[INFO] [stdout] 14 | impl<'a> Parser<'a> {
[INFO] [stdout]    | ------------------- associated function in this implementation
[INFO] [stdout] 15 |     pub fn new(input: &'a str) -> Self {
[INFO] [stdout]    |            ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `test` profile [unoptimized + debuginfo] target(s) in 0.18s
[INFO] running `Command { std: "docker" "inspect" "415c4a53d990d3d84ece16efd073e8b98b2a1bc0efe26e4b58ec4ad2e1497bb9", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "415c4a53d990d3d84ece16efd073e8b98b2a1bc0efe26e4b58ec4ad2e1497bb9", kill_on_drop: false }`
[INFO] [stdout] 415c4a53d990d3d84ece16efd073e8b98b2a1bc0efe26e4b58ec4ad2e1497bb9