[INFO] updating cached repository Tahler/assembler
[INFO] running `"git" "fetch" "--all"`
[INFO] [stdout] Fetching origin
[INFO] [stderr] From git://github.com/Tahler/assembler
[INFO] [stderr]  * branch            HEAD       -> FETCH_HEAD
[INFO] running `"git" "clone" "work/cache/sources/gh/Tahler/assembler" "work/ex/beta-1.37-6/sources/1.36.0/gh/Tahler/assembler"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.37-6/sources/1.36.0/gh/Tahler/assembler'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/Tahler/assembler" "work/ex/beta-1.37-6/sources/beta-2019-07-23/gh/Tahler/assembler"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.37-6/sources/beta-2019-07-23/gh/Tahler/assembler'...
[INFO] [stderr] done.
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] 001775dcea7b8f8165d6d5c95eb479902cb00e3b
[INFO] sha for GitHub repo Tahler/assembler: 001775dcea7b8f8165d6d5c95eb479902cb00e3b
[INFO] validating manifest of Tahler/assembler on toolchain 1.36.0
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+1.36.0" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] validating manifest of Tahler/assembler on toolchain beta-2019-07-23
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+beta-2019-07-23" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started frobbing Tahler/assembler
[INFO] finished frobbing Tahler/assembler
[INFO] frobbed toml for Tahler/assembler written to work/ex/beta-1.37-6/sources/1.36.0/gh/Tahler/assembler/Cargo.toml
[INFO] started frobbing Tahler/assembler
[INFO] finished frobbing Tahler/assembler
[INFO] frobbed toml for Tahler/assembler written to work/ex/beta-1.37-6/sources/beta-2019-07-23/gh/Tahler/assembler/Cargo.toml
[INFO] crate Tahler/assembler already has a lockfile, it will not be regenerated
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+1.36.0" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+beta-2019-07-23" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] testing Tahler/assembler against 1.36.0 for beta-1.37-6
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.37-6/worker-3/1.36.0:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.37-6/sources/1.36.0/gh/Tahler/assembler:/opt/crater/workdir:ro,Z" "-v" "/mnt/big/crater/work/local/cargo-home:/opt/crater/cargo-home:ro,Z" "-v" "/mnt/big/crater/work/local/rustup-home:/opt/crater/rustup-home:ro,Z" "-e" "USER_ID=1000" "-e" "SOURCE_DIR=/opt/crater/workdir" "-e" "MAP_USER_ID=1000" "-e" "CARGO_TARGET_DIR=/opt/crater/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=warn" "-e" "CARGO_HOME=/opt/crater/cargo-home" "-e" "RUSTUP_HOME=/opt/crater/rustup-home" "-w" "/opt/crater/workdir" "-m" "1536M" "--network" "none" "rustops/crates-build-env" "/opt/crater/cargo-home/bin/cargo" "+1.36.0" "build" "--frozen"`
[INFO] [stdout] 74973435918a0afcf90a8a19b914e1091bf4b4cdd00c4a40cf28e3b416cc6890
[INFO] running `"docker" "start" "-a" "74973435918a0afcf90a8a19b914e1091bf4b4cdd00c4a40cf28e3b416cc6890"`
[INFO] [stderr]    Compiling assembler v0.1.0 (/opt/crater/workdir)
[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 `std::result::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 `std::result::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]     Finished dev [unoptimized + debuginfo] target(s) in 0.60s
[INFO] running `"docker" "inspect" "74973435918a0afcf90a8a19b914e1091bf4b4cdd00c4a40cf28e3b416cc6890"`
[INFO] running `"docker" "rm" "-f" "74973435918a0afcf90a8a19b914e1091bf4b4cdd00c4a40cf28e3b416cc6890"`
[INFO] [stdout] 74973435918a0afcf90a8a19b914e1091bf4b4cdd00c4a40cf28e3b416cc6890
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.37-6/worker-3/1.36.0:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.37-6/sources/1.36.0/gh/Tahler/assembler:/opt/crater/workdir:ro,Z" "-v" "/mnt/big/crater/work/local/cargo-home:/opt/crater/cargo-home:ro,Z" "-v" "/mnt/big/crater/work/local/rustup-home:/opt/crater/rustup-home:ro,Z" "-e" "USER_ID=1000" "-e" "SOURCE_DIR=/opt/crater/workdir" "-e" "MAP_USER_ID=1000" "-e" "CARGO_TARGET_DIR=/opt/crater/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=warn" "-e" "CARGO_HOME=/opt/crater/cargo-home" "-e" "RUSTUP_HOME=/opt/crater/rustup-home" "-w" "/opt/crater/workdir" "-m" "1536M" "--network" "none" "rustops/crates-build-env" "/opt/crater/cargo-home/bin/cargo" "+1.36.0" "test" "--frozen" "--no-run"`
[INFO] [stdout] 6bb7c7a2e9463e91b9c4e17be2409f1d9f2f433b0261fc128841185f08610223
[INFO] running `"docker" "start" "-a" "6bb7c7a2e9463e91b9c4e17be2409f1d9f2f433b0261fc128841185f08610223"`
[INFO] [stderr]    Compiling assembler v0.1.0 (/opt/crater/workdir)
[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 `std::result::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 `std::result::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]     Finished dev [unoptimized + debuginfo] target(s) in 0.51s
[INFO] running `"docker" "inspect" "6bb7c7a2e9463e91b9c4e17be2409f1d9f2f433b0261fc128841185f08610223"`
[INFO] running `"docker" "rm" "-f" "6bb7c7a2e9463e91b9c4e17be2409f1d9f2f433b0261fc128841185f08610223"`
[INFO] [stdout] 6bb7c7a2e9463e91b9c4e17be2409f1d9f2f433b0261fc128841185f08610223
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.37-6/worker-3/1.36.0:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.37-6/sources/1.36.0/gh/Tahler/assembler:/opt/crater/workdir:ro,Z" "-v" "/mnt/big/crater/work/local/cargo-home:/opt/crater/cargo-home:ro,Z" "-v" "/mnt/big/crater/work/local/rustup-home:/opt/crater/rustup-home:ro,Z" "-e" "USER_ID=1000" "-e" "SOURCE_DIR=/opt/crater/workdir" "-e" "MAP_USER_ID=1000" "-e" "CARGO_TARGET_DIR=/opt/crater/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=warn" "-e" "CARGO_HOME=/opt/crater/cargo-home" "-e" "RUSTUP_HOME=/opt/crater/rustup-home" "-w" "/opt/crater/workdir" "-m" "1536M" "--network" "none" "rustops/crates-build-env" "/opt/crater/cargo-home/bin/cargo" "+1.36.0" "test" "--frozen"`
[INFO] [stdout] 9a9be83691aa2552160555351280f9cd5c4ac1307bb4af1b65c1894e9227d3e3
[INFO] running `"docker" "start" "-a" "9a9be83691aa2552160555351280f9cd5c4ac1307bb4af1b65c1894e9227d3e3"`
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.02s
[INFO] [stderr]      Running /opt/crater/target/debug/deps/assembler-e0aaa24c7277caaf
[INFO] [stdout] 
[INFO] [stdout] running 0 tests
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 0 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out
[INFO] [stdout] 
[INFO] running `"docker" "inspect" "9a9be83691aa2552160555351280f9cd5c4ac1307bb4af1b65c1894e9227d3e3"`
[INFO] running `"docker" "rm" "-f" "9a9be83691aa2552160555351280f9cd5c4ac1307bb4af1b65c1894e9227d3e3"`
[INFO] [stdout] 9a9be83691aa2552160555351280f9cd5c4ac1307bb4af1b65c1894e9227d3e3