[INFO] cloning repository https://github.com/Nekrolm/rust_fstlib
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/Nekrolm/rust_fstlib" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FNekrolm%2Frust_fstlib", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FNekrolm%2Frust_fstlib'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 217cc41c59c25f93ed0bdf346cf9e1cac9f4f7eb
[INFO] testing Nekrolm/rust_fstlib against 1.49.0 for beta-1.50-1
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FNekrolm%2Frust_fstlib" "/workspace/builds/worker-13/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-13/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/Nekrolm/rust_fstlib on toolchain 1.49.0
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.49.0" "read-manifest" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/Nekrolm/rust_fstlib
[INFO] finished tweaking git repo https://github.com/Nekrolm/rust_fstlib
[INFO] tweaked toml for git repo https://github.com/Nekrolm/rust_fstlib written to /workspace/builds/worker-13/source/Cargo.toml
[INFO] crate git repo https://github.com/Nekrolm/rust_fstlib already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.49.0" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-13/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-13/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" "rustops/crates-build-env@sha256:b8eeb62f26c39b23691079a6cb6de528d8e88b4d71a8f6b1d30f8ba7d9c16de9" "/opt/rustwide/cargo-home/bin/cargo" "+1.49.0" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 6606332e03ea8945a9af7580db1bfa6d5957e395c5b14eceaaf11b0dedea6f6c
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] running `Command { std: "docker" "start" "-a" "6606332e03ea8945a9af7580db1bfa6d5957e395c5b14eceaaf11b0dedea6f6c", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "6606332e03ea8945a9af7580db1bfa6d5957e395c5b14eceaaf11b0dedea6f6c", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "6606332e03ea8945a9af7580db1bfa6d5957e395c5b14eceaaf11b0dedea6f6c", kill_on_drop: false }`
[INFO] [stdout] 6606332e03ea8945a9af7580db1bfa6d5957e395c5b14eceaaf11b0dedea6f6c
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-13/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-13/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" "rustops/crates-build-env@sha256:b8eeb62f26c39b23691079a6cb6de528d8e88b4d71a8f6b1d30f8ba7d9c16de9" "/opt/rustwide/cargo-home/bin/cargo" "+1.49.0" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] c6681b4369fde2d3a5db9d583efec7b8ef37f98a912fa63338b506c18a73afbc
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] running `Command { std: "docker" "start" "-a" "c6681b4369fde2d3a5db9d583efec7b8ef37f98a912fa63338b506c18a73afbc", kill_on_drop: false }`
[INFO] [stderr]    Compiling fstcompose v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused import: `std::error::Error`
[INFO] [stdout]  --> src/fst/generic/const_fst.rs:4:5
[INFO] [stdout]   |
[INFO] [stdout] 4 | use std::error::Error;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `std::io`
[INFO] [stdout]  --> src/fst/generic/const_fst.rs:6:5
[INFO] [stdout]   |
[INFO] [stdout] 6 | use std::io;
[INFO] [stdout]   |     ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused imports: `ErrorKind`, `Error`
[INFO] [stdout]  --> src/fst/std/binary_io.rs:3:28
[INFO] [stdout]   |
[INFO] [stdout] 3 | use std::io::{Read, Write, Error, ErrorKind};
[INFO] [stdout]   |                            ^^^^^  ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `super::ConstFst`
[INFO] [stdout]  --> src/fst/std/binary_io.rs:7:5
[INFO] [stdout]   |
[INFO] [stdout] 7 | use super::ConstFst;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `std::intrinsics::transmute`
[INFO] [stdout]   --> src/fst/std/binary_io.rs:12:5
[INFO] [stdout]    |
[INFO] [stdout] 12 | use std::intrinsics::transmute;
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `state`
[INFO] [stdout]   --> src/fst/std/binary_io.rs:90:18
[INFO] [stdout]    |
[INFO] [stdout] 90 |              for state in 0..num_states {
[INFO] [stdout]    |                  ^^^^^ help: if this is intentional, prefix it with an underscore: `_state`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]   --> src/fst/std/binary_io.rs:65:9
[INFO] [stdout]    |
[INFO] [stdout] 65 |     let mut arcs = vec![Arc::new(0,0,Weight::new(0.),0); num_arcs];
[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: 7 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 1.09s
[INFO] running `Command { std: "docker" "inspect" "c6681b4369fde2d3a5db9d583efec7b8ef37f98a912fa63338b506c18a73afbc", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "c6681b4369fde2d3a5db9d583efec7b8ef37f98a912fa63338b506c18a73afbc", kill_on_drop: false }`
[INFO] [stdout] c6681b4369fde2d3a5db9d583efec7b8ef37f98a912fa63338b506c18a73afbc
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-13/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-13/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" "rustops/crates-build-env@sha256:b8eeb62f26c39b23691079a6cb6de528d8e88b4d71a8f6b1d30f8ba7d9c16de9" "/opt/rustwide/cargo-home/bin/cargo" "+1.49.0" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] dfd93f1bd6bcd4b140bacc0da696cbbfa7c2926bbca18b86c312ab291f1e03e7
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] running `Command { std: "docker" "start" "-a" "dfd93f1bd6bcd4b140bacc0da696cbbfa7c2926bbca18b86c312ab291f1e03e7", kill_on_drop: false }`
[INFO] [stderr]    Compiling fstcompose v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused import: `std::error::Error`
[INFO] [stdout]  --> src/fst/generic/const_fst.rs:4:5
[INFO] [stdout]   |
[INFO] [stdout] 4 | use std::error::Error;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `std::io`
[INFO] [stdout]  --> src/fst/generic/const_fst.rs:6:5
[INFO] [stdout]   |
[INFO] [stdout] 6 | use std::io;
[INFO] [stdout]   |     ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused imports: `ErrorKind`, `Error`
[INFO] [stdout]  --> src/fst/std/binary_io.rs:3:28
[INFO] [stdout]   |
[INFO] [stdout] 3 | use std::io::{Read, Write, Error, ErrorKind};
[INFO] [stdout]   |                            ^^^^^  ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `super::ConstFst`
[INFO] [stdout]  --> src/fst/std/binary_io.rs:7:5
[INFO] [stdout]   |
[INFO] [stdout] 7 | use super::ConstFst;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `std::intrinsics::transmute`
[INFO] [stdout]   --> src/fst/std/binary_io.rs:12:5
[INFO] [stdout]    |
[INFO] [stdout] 12 | use std::intrinsics::transmute;
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `state`
[INFO] [stdout]   --> src/fst/std/binary_io.rs:90:18
[INFO] [stdout]    |
[INFO] [stdout] 90 |              for state in 0..num_states {
[INFO] [stdout]    |                  ^^^^^ help: if this is intentional, prefix it with an underscore: `_state`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]   --> src/fst/std/binary_io.rs:65:9
[INFO] [stdout]    |
[INFO] [stdout] 65 |     let mut arcs = vec![Arc::new(0,0,Weight::new(0.),0); num_arcs];
[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] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 1.03s
[INFO] [stdout] warning: 7 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] running `Command { std: "docker" "inspect" "dfd93f1bd6bcd4b140bacc0da696cbbfa7c2926bbca18b86c312ab291f1e03e7", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "dfd93f1bd6bcd4b140bacc0da696cbbfa7c2926bbca18b86c312ab291f1e03e7", kill_on_drop: false }`
[INFO] [stdout] dfd93f1bd6bcd4b140bacc0da696cbbfa7c2926bbca18b86c312ab291f1e03e7
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-13/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-13/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" "rustops/crates-build-env@sha256:b8eeb62f26c39b23691079a6cb6de528d8e88b4d71a8f6b1d30f8ba7d9c16de9" "/opt/rustwide/cargo-home/bin/cargo" "+1.49.0" "test" "--frozen", kill_on_drop: false }`
[INFO] [stdout] 0935d188bc755a17b41ca457bc9c9a6117ced18e0aa41763a33143d24f7e7661
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] running `Command { std: "docker" "start" "-a" "0935d188bc755a17b41ca457bc9c9a6117ced18e0aa41763a33143d24f7e7661", kill_on_drop: false }`
[INFO] [stdout] 
[INFO] [stderr] warning: unused import: `std::error::Error`
[INFO] [stdout] running 0 tests
[INFO] [stderr]  --> src/fst/generic/const_fst.rs:4:5
[INFO] [stdout] 
[INFO] [stderr]   |
[INFO] [stdout] test result: ok. 0 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out
[INFO] [stderr] 4 | use std::error::Error;
[INFO] [stdout] 
[INFO] [stderr]   |     ^^^^^^^^^^^^^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `std::io`
[INFO] [stderr]  --> src/fst/generic/const_fst.rs:6:5
[INFO] [stderr]   |
[INFO] [stderr] 6 | use std::io;
[INFO] [stderr]   |     ^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused imports: `ErrorKind`, `Error`
[INFO] [stderr]  --> src/fst/std/binary_io.rs:3:28
[INFO] [stderr]   |
[INFO] [stderr] 3 | use std::io::{Read, Write, Error, ErrorKind};
[INFO] [stderr]   |                            ^^^^^  ^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `super::ConstFst`
[INFO] [stderr]  --> src/fst/std/binary_io.rs:7:5
[INFO] [stderr]   |
[INFO] [stderr] 7 | use super::ConstFst;
[INFO] [stderr]   |     ^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `std::intrinsics::transmute`
[INFO] [stderr]   --> src/fst/std/binary_io.rs:12:5
[INFO] [stderr]    |
[INFO] [stderr] 12 | use std::intrinsics::transmute;
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `state`
[INFO] [stderr]   --> src/fst/std/binary_io.rs:90:18
[INFO] [stderr]    |
[INFO] [stderr] 90 |              for state in 0..num_states {
[INFO] [stderr]    |                  ^^^^^ help: if this is intentional, prefix it with an underscore: `_state`
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]   --> src/fst/std/binary_io.rs:65:9
[INFO] [stderr]    |
[INFO] [stderr] 65 |     let mut arcs = vec![Arc::new(0,0,Weight::new(0.),0); num_arcs];
[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] warning: 7 warnings emitted
[INFO] [stderr] 
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 0.02s
[INFO] [stderr]      Running /opt/rustwide/target/debug/deps/fstcompose-62b92e7a3889abc1
[INFO] running `Command { std: "docker" "inspect" "0935d188bc755a17b41ca457bc9c9a6117ced18e0aa41763a33143d24f7e7661", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "0935d188bc755a17b41ca457bc9c9a6117ced18e0aa41763a33143d24f7e7661", kill_on_drop: false }`
[INFO] [stdout] 0935d188bc755a17b41ca457bc9c9a6117ced18e0aa41763a33143d24f7e7661