[INFO] updating cached repository Tahler/snoss
[INFO] running `"git" "fetch" "--all"`
[INFO] [stdout] Fetching origin
[INFO] [stderr] From git://github.com/Tahler/snoss
[INFO] [stderr]  * branch            HEAD       -> FETCH_HEAD
[INFO] running `"git" "clone" "work/cache/sources/gh/Tahler/snoss" "work/ex/beta-1.38-1/sources/1.37.0/gh/Tahler/snoss"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.38-1/sources/1.37.0/gh/Tahler/snoss'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/Tahler/snoss" "work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/Tahler/snoss"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/Tahler/snoss'...
[INFO] [stderr] done.
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] d4dca754c3e97fa7119cc71170c5f54a8a3e71d8
[INFO] sha for GitHub repo Tahler/snoss: d4dca754c3e97fa7119cc71170c5f54a8a3e71d8
[INFO] validating manifest of Tahler/snoss on toolchain 1.37.0
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+1.37.0" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] validating manifest of Tahler/snoss on toolchain beta-2019-08-13
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+beta-2019-08-13" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started frobbing Tahler/snoss
[INFO] finished frobbing Tahler/snoss
[INFO] frobbed toml for Tahler/snoss written to work/ex/beta-1.38-1/sources/1.37.0/gh/Tahler/snoss/Cargo.toml
[INFO] started frobbing Tahler/snoss
[INFO] finished frobbing Tahler/snoss
[INFO] frobbed toml for Tahler/snoss written to work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/Tahler/snoss/Cargo.toml
[INFO] crate Tahler/snoss already has a lockfile, it will not be regenerated
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+1.37.0" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+beta-2019-08-13" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] testing Tahler/snoss against beta-2019-08-13 for beta-1.38-1
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.38-1/worker-7/beta-2019-08-13:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/Tahler/snoss:/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" "+beta-2019-08-13" "build" "--frozen"`
[INFO] [stdout] 7de7fcb5a7cbda78e91522d96576311b076e68c38fbf9d9fa9e99efae58273c5
[INFO] running `"docker" "start" "-a" "7de7fcb5a7cbda78e91522d96576311b076e68c38fbf9d9fa9e99efae58273c5"`
[INFO] [stderr]    Compiling gcc v0.3.43
[INFO] [stderr]    Compiling quote v0.3.12
[INFO] [stderr]    Compiling serde v0.9.7
[INFO] [stderr]    Compiling ordered-float v0.4.0
[INFO] [stderr]    Compiling typemap v0.3.3
[INFO] [stderr]    Compiling chrono v0.3.0
[INFO] [stderr]    Compiling syn v0.11.4
[INFO] [stderr]    Compiling miniz-sys v0.1.9
[INFO] [stderr]    Compiling flate2 v0.2.17
[INFO] [stderr]    Compiling serde_codegen_internals v0.13.0
[INFO] [stderr]    Compiling serde_derive v0.9.7
[INFO] [stderr]    Compiling serde-value v0.4.0
[INFO] [stderr]    Compiling serde_json v0.9.6
[INFO] [stderr]    Compiling serde_yaml v0.6.1
[INFO] [stderr]    Compiling log4rs v0.6.1
[INFO] [stderr]    Compiling snoss v0.1.0 (/opt/crater/workdir)
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]    --> src/os/exec.rs:194:13
[INFO] [stderr]     |
[INFO] [stderr] 194 |         let mut stack = pcb.get_stack_mut();
[INFO] [stderr]     |             ----^^^^^
[INFO] [stderr]     |             |
[INFO] [stderr]     |             help: remove this `mut`
[INFO] [stderr]     |
[INFO] [stderr]     = note: `#[warn(unused_mut)]` on by default
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 48.65s
[INFO] running `"docker" "inspect" "7de7fcb5a7cbda78e91522d96576311b076e68c38fbf9d9fa9e99efae58273c5"`
[INFO] running `"docker" "rm" "-f" "7de7fcb5a7cbda78e91522d96576311b076e68c38fbf9d9fa9e99efae58273c5"`
[INFO] [stdout] 7de7fcb5a7cbda78e91522d96576311b076e68c38fbf9d9fa9e99efae58273c5
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.38-1/worker-7/beta-2019-08-13:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/Tahler/snoss:/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" "+beta-2019-08-13" "test" "--frozen" "--no-run"`
[INFO] [stdout] 3efa65d0f8bd34df5008bed7c805912e355d10b4811e017f4ff1dbc347cf5ac2
[INFO] running `"docker" "start" "-a" "3efa65d0f8bd34df5008bed7c805912e355d10b4811e017f4ff1dbc347cf5ac2"`
[INFO] [stderr]    Compiling snoss v0.1.0 (/opt/crater/workdir)
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]    --> src/os/exec.rs:194:13
[INFO] [stderr]     |
[INFO] [stderr] 194 |         let mut stack = pcb.get_stack_mut();
[INFO] [stderr]     |             ----^^^^^
[INFO] [stderr]     |             |
[INFO] [stderr]     |             help: remove this `mut`
[INFO] [stderr]     |
[INFO] [stderr]     = note: `#[warn(unused_mut)]` on by default
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 1.15s
[INFO] running `"docker" "inspect" "3efa65d0f8bd34df5008bed7c805912e355d10b4811e017f4ff1dbc347cf5ac2"`
[INFO] running `"docker" "rm" "-f" "3efa65d0f8bd34df5008bed7c805912e355d10b4811e017f4ff1dbc347cf5ac2"`
[INFO] [stdout] 3efa65d0f8bd34df5008bed7c805912e355d10b4811e017f4ff1dbc347cf5ac2
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.38-1/worker-7/beta-2019-08-13:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/Tahler/snoss:/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" "+beta-2019-08-13" "test" "--frozen"`
[INFO] [stdout] 0a607ba384b649514496b4d9de1acbcd10ed52a35e18956ab24cd5bb562e1de5
[INFO] running `"docker" "start" "-a" "0a607ba384b649514496b4d9de1acbcd10ed52a35e18956ab24cd5bb562e1de5"`
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.03s
[INFO] [stderr]      Running /opt/crater/target/debug/deps/snoss-995de952ea07ecee
[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" "0a607ba384b649514496b4d9de1acbcd10ed52a35e18956ab24cd5bb562e1de5"`
[INFO] running `"docker" "rm" "-f" "0a607ba384b649514496b4d9de1acbcd10ed52a35e18956ab24cd5bb562e1de5"`
[INFO] [stdout] 0a607ba384b649514496b4d9de1acbcd10ed52a35e18956ab24cd5bb562e1de5