[INFO] fetching crate cargo-mutagen 0.1.2...
[INFO] checking cargo-mutagen-0.1.2 against try#b1cc2963e8346ba1f5afb1edb86dbcf3f9ef0c5f for pr-76104
[INFO] extracting crate cargo-mutagen 0.1.2 into /workspace/builds/worker-6/source
[INFO] validating manifest of crates.io crate cargo-mutagen 0.1.2 on toolchain b1cc2963e8346ba1f5afb1edb86dbcf3f9ef0c5f
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+b1cc2963e8346ba1f5afb1edb86dbcf3f9ef0c5f" "read-manifest" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] started tweaking crates.io crate cargo-mutagen 0.1.2
[INFO] finished tweaking crates.io crate cargo-mutagen 0.1.2
[INFO] tweaked toml for crates.io crate cargo-mutagen 0.1.2 written to /workspace/builds/worker-6/source/Cargo.toml
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+b1cc2963e8346ba1f5afb1edb86dbcf3f9ef0c5f" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update", kill_on_drop: false }`
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+b1cc2963e8346ba1f5afb1edb86dbcf3f9ef0c5f" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded wait-timeout v0.1.5
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6/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:d92eaeed33fa75130ca1ee6c8a01d1ffb62bac859dfdfb3450e3e5d1c0146529" "/opt/rustwide/cargo-home/bin/cargo" "+b1cc2963e8346ba1f5afb1edb86dbcf3f9ef0c5f" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] [stdout] 77c21639ee4db82a6c2458691ade65aa1d2da70b870ab926fce80b85cab24fd1
[INFO] running `Command { std: "docker" "start" "-a" "77c21639ee4db82a6c2458691ade65aa1d2da70b870ab926fce80b85cab24fd1", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "77c21639ee4db82a6c2458691ade65aa1d2da70b870ab926fce80b85cab24fd1", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "77c21639ee4db82a6c2458691ade65aa1d2da70b870ab926fce80b85cab24fd1", kill_on_drop: false }`
[INFO] [stdout] 77c21639ee4db82a6c2458691ade65aa1d2da70b870ab926fce80b85cab24fd1
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6/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" "-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:d92eaeed33fa75130ca1ee6c8a01d1ffb62bac859dfdfb3450e3e5d1c0146529" "/opt/rustwide/cargo-home/bin/cargo" "+b1cc2963e8346ba1f5afb1edb86dbcf3f9ef0c5f" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 77a99c28207daabac8efc54bc58b4fa6e32a67fb4de14f2097969717870ab7f9
[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" "77a99c28207daabac8efc54bc58b4fa6e32a67fb4de14f2097969717870ab7f9", kill_on_drop: false }`
[INFO] [stderr]    Compiling proc-macro2 v1.0.21
[INFO] [stderr]    Compiling unicode-xid v0.2.1
[INFO] [stderr]    Compiling autocfg v1.0.1
[INFO] [stderr]    Compiling syn v1.0.41
[INFO] [stderr]     Checking adler v0.2.3
[INFO] [stderr]    Compiling failure_derive v0.1.8
[INFO] [stderr]     Checking gimli v0.22.0
[INFO] [stderr]     Checking rustc-demangle v0.1.16
[INFO] [stderr]     Checking cfg-if v0.1.10
[INFO] [stderr]     Checking object v0.20.0
[INFO] [stderr]     Checking json v0.11.15
[INFO] [stderr]     Checking wait-timeout v0.1.5
[INFO] [stderr]    Compiling miniz_oxide v0.4.2
[INFO] [stderr]    Compiling quote v1.0.7
[INFO] [stderr]     Checking addr2line v0.13.0
[INFO] [stderr]     Checking backtrace v0.3.50
[INFO] [stderr]    Compiling synstructure v0.12.4
[INFO] [stderr]     Checking failure v0.1.8
[INFO] [stderr]     Checking cargo-mutagen v0.1.2 (/opt/rustwide/workdir)
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/main.rs:48:31
[INFO] [stdout]    |
[INFO] [stdout] 48 | fn run_mutations(runner: &mut Runner, list: &[String]) -> Result<()> {
[INFO] [stdout]    |                               ^^^^^^ help: use `dyn`: `dyn Runner`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(bare_trait_objects)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]    --> src/main.rs:161:26
[INFO] [stdout]     |
[INFO] [stdout] 161 |         let runner: &mut Runner = if with_coverage {
[INFO] [stdout]     |                          ^^^^^^ help: use `dyn`: `dyn Runner`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/main.rs:48:31
[INFO] [stdout]    |
[INFO] [stdout] 48 | fn run_mutations(runner: &mut Runner, list: &[String]) -> Result<()> {
[INFO] [stdout]    |                               ^^^^^^ help: use `dyn`: `dyn Runner`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(bare_trait_objects)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]    --> src/main.rs:161:26
[INFO] [stdout]     |
[INFO] [stdout] 161 |         let runner: &mut Runner = if with_coverage {
[INFO] [stdout]     |                          ^^^^^^ help: use `dyn`: `dyn Runner`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 2 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 2 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 27.17s
[INFO] running `Command { std: "docker" "inspect" "77a99c28207daabac8efc54bc58b4fa6e32a67fb4de14f2097969717870ab7f9", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "77a99c28207daabac8efc54bc58b4fa6e32a67fb4de14f2097969717870ab7f9", kill_on_drop: false }`
[INFO] [stdout] 77a99c28207daabac8efc54bc58b4fa6e32a67fb4de14f2097969717870ab7f9