[INFO] cloning repository https://github.com/Techno-coder/calculator
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/Techno-coder/calculator" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FTechno-coder%2Fcalculator", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FTechno-coder%2Fcalculator'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] e65b59fdec94b8c9898a19439dce9d7712280f16
[INFO] building Techno-coder/calculator 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%2FTechno-coder%2Fcalculator" "/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/Techno-coder/calculator 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/Techno-coder/calculator
[INFO] finished tweaking git repo https://github.com/Techno-coder/calculator
[INFO] tweaked toml for git repo https://github.com/Techno-coder/calculator written to /workspace/builds/worker-6-tc1/source/Cargo.toml
[INFO] crate git repo https://github.com/Techno-coder/calculator 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]     Updating crates.io index
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded crossterm_input v0.5.0
[INFO] [stderr]   Downloaded crossterm_cursor v0.4.0
[INFO] [stderr]   Downloaded crossterm_winapi v0.3.0
[INFO] [stderr]   Downloaded crossterm_screen v0.3.2
[INFO] [stderr]   Downloaded crossterm_utils v0.4.0
[INFO] [stderr]   Downloaded crossterm_style v0.5.2
[INFO] [stderr]   Downloaded crossterm_terminal v0.3.2
[INFO] [stderr]   Downloaded crossterm v0.12.0
[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] ccfc6839d9c118fa35d2f1e339f15673b554d831447e4f7c544e81d722035c7d
[INFO] running `Command { std: "docker" "start" "-a" "ccfc6839d9c118fa35d2f1e339f15673b554d831447e4f7c544e81d722035c7d", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "ccfc6839d9c118fa35d2f1e339f15673b554d831447e4f7c544e81d722035c7d", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "ccfc6839d9c118fa35d2f1e339f15673b554d831447e4f7c544e81d722035c7d", kill_on_drop: false }`
[INFO] [stdout] ccfc6839d9c118fa35d2f1e339f15673b554d831447e4f7c544e81d722035c7d
[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] be47b68e5c15f94a6eaa5e3a8032f8236f8df8bda45c6cf89a81ad8b2fd97714
[INFO] running `Command { std: "docker" "start" "-a" "be47b68e5c15f94a6eaa5e3a8032f8236f8df8bda45c6cf89a81ad8b2fd97714", kill_on_drop: false }`
[INFO] [stderr]    Compiling libc v0.2.65
[INFO] [stderr]    Compiling lazy_static v1.4.0
[INFO] [stderr]    Compiling log v0.4.8
[INFO] [stderr]    Compiling cfg-if v0.1.10
[INFO] [stderr]    Compiling slab v0.4.2
[INFO] [stderr]    Compiling crossterm_utils v0.4.0
[INFO] [stderr]    Compiling iovec v0.1.4
[INFO] [stderr]    Compiling net2 v0.2.33
[INFO] [stderr]    Compiling crossterm_screen v0.3.2
[INFO] [stderr]    Compiling crossterm_style v0.5.2
[INFO] [stderr]    Compiling mio v0.6.19
[INFO] [stderr]    Compiling crossterm_input v0.5.0
[INFO] [stderr]    Compiling crossterm_cursor v0.4.0
[INFO] [stderr]    Compiling crossterm_terminal v0.3.2
[INFO] [stderr]    Compiling crossterm v0.12.0
[INFO] [stderr]    Compiling calculator v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: elided lifetime has a name
[INFO] [stdout]   --> src/lexer.rs:18:33
[INFO] [stdout]    |
[INFO] [stdout] 17 | impl<'a> Lexer<'a> {
[INFO] [stdout]    |      -- lifetime `'a` declared here
[INFO] [stdout] 18 |     pub fn new(string: &'a str) -> Lexer {
[INFO] [stdout]    |                                    ^^^^^ this elided lifetime gets resolved as `'a`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(elided_named_lifetimes)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `evaluate`
[INFO] [stdout]  --> src/interface/mod.rs:1:24
[INFO] [stdout]   |
[INFO] [stdout] 1 | pub use basic::{basic, evaluate, evaluate_direct};
[INFO] [stdout]   |                        ^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `last_coalesce` is never read
[INFO] [stdout]   --> src/lexer.rs:13:2
[INFO] [stdout]    |
[INFO] [stdout] 10 | pub struct Lexer<'a> {
[INFO] [stdout]    |            ----- field in this struct
[INFO] [stdout] ...
[INFO] [stdout] 13 |     last_coalesce: bool,
[INFO] [stdout]    |     ^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `Lexer` has derived impls for the traits `Clone` and `Debug`, but these are intentionally ignored during dead code analysis
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 1.53s
[INFO] running `Command { std: "docker" "inspect" "be47b68e5c15f94a6eaa5e3a8032f8236f8df8bda45c6cf89a81ad8b2fd97714", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "be47b68e5c15f94a6eaa5e3a8032f8236f8df8bda45c6cf89a81ad8b2fd97714", kill_on_drop: false }`
[INFO] [stdout] be47b68e5c15f94a6eaa5e3a8032f8236f8df8bda45c6cf89a81ad8b2fd97714
[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] fcc6e2a417f6895b23397e24f58998a3988f25b250ba0b452ee54435f347f00d
[INFO] running `Command { std: "docker" "start" "-a" "fcc6e2a417f6895b23397e24f58998a3988f25b250ba0b452ee54435f347f00d", kill_on_drop: false }`
[INFO] [stderr]    Compiling calculator v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: elided lifetime has a name
[INFO] [stdout]   --> src/lexer.rs:18:33
[INFO] [stdout]    |
[INFO] [stdout] 17 | impl<'a> Lexer<'a> {
[INFO] [stdout]    |      -- lifetime `'a` declared here
[INFO] [stdout] 18 |     pub fn new(string: &'a str) -> Lexer {
[INFO] [stdout]    |                                    ^^^^^ this elided lifetime gets resolved as `'a`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(elided_named_lifetimes)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]   --> src/tests/evaluation.rs:40:6
[INFO] [stdout]    |
[INFO] [stdout] 40 |     let mut context = &mut Context::default();
[INFO] [stdout]    |         ----^^^^^^^
[INFO] [stdout]    |         |
[INFO] [stdout]    |         help: remove this `mut`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_mut)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `last_coalesce` is never read
[INFO] [stdout]   --> src/lexer.rs:13:2
[INFO] [stdout]    |
[INFO] [stdout] 10 | pub struct Lexer<'a> {
[INFO] [stdout]    |            ----- field in this struct
[INFO] [stdout] ...
[INFO] [stdout] 13 |     last_coalesce: bool,
[INFO] [stdout]    |     ^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `Lexer` has derived impls for the traits `Clone` and `Debug`, but these are intentionally ignored during dead code analysis
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `test` profile [unoptimized + debuginfo] target(s) in 0.56s
[INFO] running `Command { std: "docker" "inspect" "fcc6e2a417f6895b23397e24f58998a3988f25b250ba0b452ee54435f347f00d", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "fcc6e2a417f6895b23397e24f58998a3988f25b250ba0b452ee54435f347f00d", kill_on_drop: false }`
[INFO] [stdout] fcc6e2a417f6895b23397e24f58998a3988f25b250ba0b452ee54435f347f00d