[INFO] cloning repository https://github.com/GeertVL/rs-rop-example
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/GeertVL/rs-rop-example" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FGeertVL%2Frs-rop-example", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FGeertVL%2Frs-rop-example'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 42d88d225945b5ac4ac31f970967a99470d8e1e1
[INFO] testing GeertVL/rs-rop-example against beta-2020-07-24 for beta-1.46-1
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FGeertVL%2Frs-rop-example" "/workspace/builds/worker-6/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-6/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/GeertVL/rs-rop-example on toolchain beta-2020-07-24
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2020-07-24" "read-manifest" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/GeertVL/rs-rop-example
[INFO] finished tweaking git repo https://github.com/GeertVL/rs-rop-example
[INFO] tweaked toml for git repo https://github.com/GeertVL/rs-rop-example written to /workspace/builds/worker-6/source/Cargo.toml
[INFO] crate git repo https://github.com/GeertVL/rs-rop-example already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2020-07-24" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[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" "MAP_USER_ID=0" "-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" "--network" "none" "rustops/crates-build-env@sha256:a636fd89d022f18117e1dc8fb37a0a009933cdbbe082814857f0e2024962d47c" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2020-07-24" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] c5a4f16414f2d657f0cfaef4a413b3f79e90568fff35e144f6790b35f4d7fa7a
[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" "c5a4f16414f2d657f0cfaef4a413b3f79e90568fff35e144f6790b35f4d7fa7a", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "c5a4f16414f2d657f0cfaef4a413b3f79e90568fff35e144f6790b35f4d7fa7a", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "c5a4f16414f2d657f0cfaef4a413b3f79e90568fff35e144f6790b35f4d7fa7a", kill_on_drop: false }`
[INFO] [stdout] c5a4f16414f2d657f0cfaef4a413b3f79e90568fff35e144f6790b35f4d7fa7a
[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" "MAP_USER_ID=0" "-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" "--network" "none" "rustops/crates-build-env@sha256:a636fd89d022f18117e1dc8fb37a0a009933cdbbe082814857f0e2024962d47c" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2020-07-24" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] eba49844563decb09d5c739e83b2691128464e0eeb5f44355a0d065da5ca9f25
[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" "eba49844563decb09d5c739e83b2691128464e0eeb5f44355a0d065da5ca9f25", kill_on_drop: false }`
[INFO] [stderr]    Compiling RsRopExample v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] error[E0308]: mismatched types
[INFO] [stdout]   --> src/rop/utils.rs:15:24
[INFO] [stdout]    |
[INFO] [stdout] 15 |     RopResult::Failure(Option::Some(vec![msg]))
[INFO] [stdout]    |                        ^^^^^^^^^^^^^^^^^^^^^^^ expected struct `std::vec::Vec`, found enum `std::option::Option`
[INFO] [stdout]    |
[INFO] [stdout]    = note: expected struct `std::vec::Vec<_>`
[INFO] [stdout]                 found enum `std::option::Option<std::vec::Vec<_>>`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to previous error
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0308`.
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `RsRopExample`.
[INFO] [stderr] 
[INFO] [stderr] To learn more, run the command again with --verbose.
[INFO] running `Command { std: "docker" "inspect" "eba49844563decb09d5c739e83b2691128464e0eeb5f44355a0d065da5ca9f25", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "eba49844563decb09d5c739e83b2691128464e0eeb5f44355a0d065da5ca9f25", kill_on_drop: false }`
[INFO] [stdout] eba49844563decb09d5c739e83b2691128464e0eeb5f44355a0d065da5ca9f25