[INFO] cloning repository https://github.com/pieri93/rust_assembly
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/pieri93/rust_assembly" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fpieri93%2Frust_assembly", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fpieri93%2Frust_assembly'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 4e23df0eda0f66c09741ecae5a32b223ff09fdea
[INFO] building pieri93/rust_assembly 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%2Fpieri93%2Frust_assembly" "/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/pieri93/rust_assembly 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/pieri93/rust_assembly
[INFO] finished tweaking git repo https://github.com/pieri93/rust_assembly
[INFO] tweaked toml for git repo https://github.com/pieri93/rust_assembly written to /workspace/builds/worker-6-tc1/source/Cargo.toml
[INFO] crate git repo https://github.com/pieri93/rust_assembly 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] 78917df64761e5c7af239439fbc045551c248c7ce0a5fd689c3321dd8d29b155
[INFO] running `Command { std: "docker" "start" "-a" "78917df64761e5c7af239439fbc045551c248c7ce0a5fd689c3321dd8d29b155", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "78917df64761e5c7af239439fbc045551c248c7ce0a5fd689c3321dd8d29b155", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "78917df64761e5c7af239439fbc045551c248c7ce0a5fd689c3321dd8d29b155", kill_on_drop: false }`
[INFO] [stdout] 78917df64761e5c7af239439fbc045551c248c7ce0a5fd689c3321dd8d29b155
[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] 667483a5bbd7f714a3f1a391d96e9e9c58762d27ea2d43c9ebb15487bc91df77
[INFO] running `Command { std: "docker" "start" "-a" "667483a5bbd7f714a3f1a391d96e9e9c58762d27ea2d43c9ebb15487bc91df77", kill_on_drop: false }`
[INFO] [stderr]    Compiling rust_assembly v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: type `instr` should have an upper camel case name
[INFO] [stdout]   --> src/main.rs:58:6
[INFO] [stdout]    |
[INFO] [stdout] 58 | enum instr {
[INFO] [stdout]    |      ^^^^^ help: convert the identifier to upper camel case (notice the capitalization): `Instr`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(non_camel_case_types)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary parentheses around `return` value
[INFO] [stdout]    --> src/main.rs:121:16
[INFO] [stdout]     |
[INFO] [stdout] 121 |         return (format!(""));
[INFO] [stdout]     |                ^           ^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_parens)]` on by default
[INFO] [stdout] help: remove these parentheses
[INFO] [stdout]     |
[INFO] [stdout] 121 -         return (format!(""));
[INFO] [stdout] 121 +         return format!("");
[INFO] [stdout]     |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary parentheses around `return` value
[INFO] [stdout]    --> src/main.rs:123:16
[INFO] [stdout]     |
[INFO] [stdout] 123 |         return (format!(" + {value}"));
[INFO] [stdout]     |                ^                     ^
[INFO] [stdout]     |
[INFO] [stdout] help: remove these parentheses
[INFO] [stdout]     |
[INFO] [stdout] 123 -         return (format!(" + {value}"));
[INFO] [stdout] 123 +         return format!(" + {value}");
[INFO] [stdout]     |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]  --> src/main.rs:9:17
[INFO] [stdout]   |
[INFO] [stdout] 9 |             let mut reg = get_reg(w, (buffer[1] >> 3) & 0b00000111).to_string();
[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: variable does not need to be mutable
[INFO] [stdout]   --> src/main.rs:10:17
[INFO] [stdout]    |
[INFO] [stdout] 10 |             let mut rm = match mod_ {
[INFO] [stdout]    |                 ----^^
[INFO] [stdout]    |                 |
[INFO] [stdout]    |                 help: remove this `mut`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]    --> src/main.rs:174:9
[INFO] [stdout]     |
[INFO] [stdout] 174 |     let mut read_bytes = file.read_to_end(&mut buffer).expect("unable to read file");
[INFO] [stdout]     |         ----^^^^^^^^^^
[INFO] [stdout]     |         |
[INFO] [stdout]     |         help: remove this `mut`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `get_dw` is never used
[INFO] [stdout]   --> src/main.rs:78:4
[INFO] [stdout]    |
[INFO] [stdout] 78 | fn get_dw(buffer: u8) -> u8 {
[INFO] [stdout]    |    ^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 0.35s
[INFO] running `Command { std: "docker" "inspect" "667483a5bbd7f714a3f1a391d96e9e9c58762d27ea2d43c9ebb15487bc91df77", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "667483a5bbd7f714a3f1a391d96e9e9c58762d27ea2d43c9ebb15487bc91df77", kill_on_drop: false }`
[INFO] [stdout] 667483a5bbd7f714a3f1a391d96e9e9c58762d27ea2d43c9ebb15487bc91df77
[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] 86a4137dad139509f5370fd889b26a78c09b31d9c5f06dd26480026236d8e73e
[INFO] running `Command { std: "docker" "start" "-a" "86a4137dad139509f5370fd889b26a78c09b31d9c5f06dd26480026236d8e73e", kill_on_drop: false }`
[INFO] [stderr]    Compiling rust_assembly v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: type `instr` should have an upper camel case name
[INFO] [stdout]   --> src/main.rs:58:6
[INFO] [stdout]    |
[INFO] [stdout] 58 | enum instr {
[INFO] [stdout]    |      ^^^^^ help: convert the identifier to upper camel case (notice the capitalization): `Instr`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(non_camel_case_types)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary parentheses around `return` value
[INFO] [stdout]    --> src/main.rs:121:16
[INFO] [stdout]     |
[INFO] [stdout] 121 |         return (format!(""));
[INFO] [stdout]     |                ^           ^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_parens)]` on by default
[INFO] [stdout] help: remove these parentheses
[INFO] [stdout]     |
[INFO] [stdout] 121 -         return (format!(""));
[INFO] [stdout] 121 +         return format!("");
[INFO] [stdout]     |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary parentheses around `return` value
[INFO] [stdout]    --> src/main.rs:123:16
[INFO] [stdout]     |
[INFO] [stdout] 123 |         return (format!(" + {value}"));
[INFO] [stdout]     |                ^                     ^
[INFO] [stdout]     |
[INFO] [stdout] help: remove these parentheses
[INFO] [stdout]     |
[INFO] [stdout] 123 -         return (format!(" + {value}"));
[INFO] [stdout] 123 +         return format!(" + {value}");
[INFO] [stdout]     |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]  --> src/main.rs:9:17
[INFO] [stdout]   |
[INFO] [stdout] 9 |             let mut reg = get_reg(w, (buffer[1] >> 3) & 0b00000111).to_string();
[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: variable does not need to be mutable
[INFO] [stdout]   --> src/main.rs:10:17
[INFO] [stdout]    |
[INFO] [stdout] 10 |             let mut rm = match mod_ {
[INFO] [stdout]    |                 ----^^
[INFO] [stdout]    |                 |
[INFO] [stdout]    |                 help: remove this `mut`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]    --> src/main.rs:174:9
[INFO] [stdout]     |
[INFO] [stdout] 174 |     let mut read_bytes = file.read_to_end(&mut buffer).expect("unable to read file");
[INFO] [stdout]     |         ----^^^^^^^^^^
[INFO] [stdout]     |         |
[INFO] [stdout]     |         help: remove this `mut`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `get_dw` is never used
[INFO] [stdout]   --> src/main.rs:78:4
[INFO] [stdout]    |
[INFO] [stdout] 78 | fn get_dw(buffer: u8) -> u8 {
[INFO] [stdout]    |    ^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `test` profile [unoptimized + debuginfo] target(s) in 0.29s
[INFO] running `Command { std: "docker" "inspect" "86a4137dad139509f5370fd889b26a78c09b31d9c5f06dd26480026236d8e73e", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "86a4137dad139509f5370fd889b26a78c09b31d9c5f06dd26480026236d8e73e", kill_on_drop: false }`
[INFO] [stdout] 86a4137dad139509f5370fd889b26a78c09b31d9c5f06dd26480026236d8e73e