[INFO] cloning repository https://github.com/Tahler/assembler
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/Tahler/assembler" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FTahler%2Fassembler", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FTahler%2Fassembler'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 001775dcea7b8f8165d6d5c95eb479902cb00e3b
[INFO] testing Tahler/assembler against 1.55.0 for beta-1.56-1
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FTahler%2Fassembler" "/workspace/builds/worker-2/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-2/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/Tahler/assembler on toolchain 1.55.0
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.55.0" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/Tahler/assembler
[INFO] finished tweaking git repo https://github.com/Tahler/assembler
[INFO] tweaked toml for git repo https://github.com/Tahler/assembler written to /workspace/builds/worker-2/source/Cargo.toml
[INFO] crate git repo https://github.com/Tahler/assembler already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.55.0" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2/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:a89201d6b5b9fd45c15d5952ece0a0129e7e80cb26ec023fd59cf09bc26f1604" "/opt/rustwide/cargo-home/bin/cargo" "+1.55.0" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 1e46e2cf108c9460d0824af9d02e5d2dde6dab933925a8ab3ec9a058cd08e268
[INFO] running `Command { std: "docker" "start" "-a" "1e46e2cf108c9460d0824af9d02e5d2dde6dab933925a8ab3ec9a058cd08e268", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "1e46e2cf108c9460d0824af9d02e5d2dde6dab933925a8ab3ec9a058cd08e268", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "1e46e2cf108c9460d0824af9d02e5d2dde6dab933925a8ab3ec9a058cd08e268", kill_on_drop: false }`
[INFO] [stdout] 1e46e2cf108c9460d0824af9d02e5d2dde6dab933925a8ab3ec9a058cd08e268
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2/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=warn" "-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:a89201d6b5b9fd45c15d5952ece0a0129e7e80cb26ec023fd59cf09bc26f1604" "/opt/rustwide/cargo-home/bin/cargo" "+1.55.0" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 0bbb8bcc1b8e3e8298d33691a605ea33ebb3d235e5f148a29525178042c09943
[INFO] running `Command { std: "docker" "start" "-a" "0bbb8bcc1b8e3e8298d33691a605ea33ebb3d235e5f148a29525178042c09943", kill_on_drop: false }`
[INFO] [stderr]    Compiling assembler v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]    --> src/main.rs:102:45
[INFO] [stdout]     |
[INFO] [stdout] 102 |     let instruction_type: InstructionType = try!(InstructionType::decode(instruction));
[INFO] [stdout]     |                                             ^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(deprecated)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `fs` is imported redundantly
[INFO] [stdout]    --> src/main.rs:127:9
[INFO] [stdout]     |
[INFO] [stdout] 1   | use std::{fs, io};
[INFO] [stdout]     |           -- the item `fs` is already imported here
[INFO] [stdout] ...
[INFO] [stdout] 127 |     use std::fs;
[INFO] [stdout]     |         ^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `Result` that must be used
[INFO] [stdout]    --> src/main.rs:133:9
[INFO] [stdout]     |
[INFO] [stdout] 133 |         fs::remove_file(out_path);
[INFO] [stdout]     |         ^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_must_use)]` on by default
[INFO] [stdout]     = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `Result` that must be used
[INFO] [stdout]    --> src/main.rs:143:21
[INFO] [stdout]     |
[INFO] [stdout] 143 |                     out_file.write_all(&instruction_bytes);
[INFO] [stdout]     |                     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 4 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 1.62s
[INFO] running `Command { std: "docker" "inspect" "0bbb8bcc1b8e3e8298d33691a605ea33ebb3d235e5f148a29525178042c09943", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "0bbb8bcc1b8e3e8298d33691a605ea33ebb3d235e5f148a29525178042c09943", kill_on_drop: false }`
[INFO] [stdout] 0bbb8bcc1b8e3e8298d33691a605ea33ebb3d235e5f148a29525178042c09943
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2/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=warn" "-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:a89201d6b5b9fd45c15d5952ece0a0129e7e80cb26ec023fd59cf09bc26f1604" "/opt/rustwide/cargo-home/bin/cargo" "+1.55.0" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 7cc2bf13f1c6ad435305d91d6fa3f2e7894c80ad51525496493bfa70cb19fe65
[INFO] running `Command { std: "docker" "start" "-a" "7cc2bf13f1c6ad435305d91d6fa3f2e7894c80ad51525496493bfa70cb19fe65", kill_on_drop: false }`
[INFO] [stderr]    Compiling assembler v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]    --> src/main.rs:102:45
[INFO] [stdout]     |
[INFO] [stdout] 102 |     let instruction_type: InstructionType = try!(InstructionType::decode(instruction));
[INFO] [stdout]     |                                             ^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(deprecated)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `fs` is imported redundantly
[INFO] [stdout]    --> src/main.rs:127:9
[INFO] [stdout]     |
[INFO] [stdout] 1   | use std::{fs, io};
[INFO] [stdout]     |           -- the item `fs` is already imported here
[INFO] [stdout] ...
[INFO] [stdout] 127 |     use std::fs;
[INFO] [stdout]     |         ^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `Result` that must be used
[INFO] [stdout]    --> src/main.rs:133:9
[INFO] [stdout]     |
[INFO] [stdout] 133 |         fs::remove_file(out_path);
[INFO] [stdout]     |         ^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_must_use)]` on by default
[INFO] [stdout]     = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `Result` that must be used
[INFO] [stdout]    --> src/main.rs:143:21
[INFO] [stdout]     |
[INFO] [stdout] 143 |                     out_file.write_all(&instruction_bytes);
[INFO] [stdout]     |                     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 0.72s
[INFO] [stdout] warning: 4 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] running `Command { std: "docker" "inspect" "7cc2bf13f1c6ad435305d91d6fa3f2e7894c80ad51525496493bfa70cb19fe65", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "7cc2bf13f1c6ad435305d91d6fa3f2e7894c80ad51525496493bfa70cb19fe65", kill_on_drop: false }`
[INFO] [stdout] 7cc2bf13f1c6ad435305d91d6fa3f2e7894c80ad51525496493bfa70cb19fe65
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2/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=warn" "-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:a89201d6b5b9fd45c15d5952ece0a0129e7e80cb26ec023fd59cf09bc26f1604" "/opt/rustwide/cargo-home/bin/cargo" "+1.55.0" "test" "--frozen", kill_on_drop: false }`
[INFO] [stdout] a3e6f69846bde006b3a3b1cb69cc4c254db7fb1909c8c3384a5e7817ffad8749
[INFO] running `Command { std: "docker" "start" "-a" "a3e6f69846bde006b3a3b1cb69cc4c254db7fb1909c8c3384a5e7817ffad8749", kill_on_drop: false }`
[INFO] [stdout] 
[INFO] [stderr] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout] running 0 tests
[INFO] [stderr]    --> src/main.rs:102:45
[INFO] [stdout] 
[INFO] [stderr]     |
[INFO] [stdout] test result: ok. 0 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.00s
[INFO] [stderr] 102 |     let instruction_type: InstructionType = try!(InstructionType::decode(instruction));
[INFO] [stdout] 
[INFO] [stderr]     |                                             ^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: `#[warn(deprecated)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: the item `fs` is imported redundantly
[INFO] [stderr]    --> src/main.rs:127:9
[INFO] [stderr]     |
[INFO] [stderr] 1   | use std::{fs, io};
[INFO] [stderr]     |           -- the item `fs` is already imported here
[INFO] [stderr] ...
[INFO] [stderr] 127 |     use std::fs;
[INFO] [stderr]     |         ^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: `#[warn(unused_imports)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused `Result` that must be used
[INFO] [stderr]    --> src/main.rs:133:9
[INFO] [stderr]     |
[INFO] [stderr] 133 |         fs::remove_file(out_path);
[INFO] [stderr]     |         ^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: `#[warn(unused_must_use)]` on by default
[INFO] [stderr]     = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stderr] 
[INFO] [stderr] warning: unused `Result` that must be used
[INFO] [stderr]    --> src/main.rs:143:21
[INFO] [stderr]     |
[INFO] [stderr] 143 |                     out_file.write_all(&instruction_bytes);
[INFO] [stderr]     |                     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stderr] 
[INFO] [stderr] warning: `assembler` (bin "assembler" test) generated 4 warnings
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 0.01s
[INFO] [stderr]      Running unittests (/opt/rustwide/target/debug/deps/assembler-059aa2adedd1e86d)
[INFO] running `Command { std: "docker" "inspect" "a3e6f69846bde006b3a3b1cb69cc4c254db7fb1909c8c3384a5e7817ffad8749", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "a3e6f69846bde006b3a3b1cb69cc4c254db7fb1909c8c3384a5e7817ffad8749", kill_on_drop: false }`
[INFO] [stdout] a3e6f69846bde006b3a3b1cb69cc4c254db7fb1909c8c3384a5e7817ffad8749