[INFO] updating cached repository https://github.com/lnenad/image-to-ascii
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "-c" "remote.origin.fetch=refs/heads/*:refs/heads/*" "fetch" "origin" "--force" "--prune", kill_on_drop: false }`
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 3a6cfa6c1e70e7a6a5ed675ca8a61950c5a613b5
[INFO] checking lnenad/image-to-ascii against try#6024cfef3a82f9a7688f07054f1650081bad3af5 for pr-74130
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Flnenad%2Fimage-to-ascii" "/workspace/builds/worker-14/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-14/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/lnenad/image-to-ascii on toolchain 6024cfef3a82f9a7688f07054f1650081bad3af5
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+6024cfef3a82f9a7688f07054f1650081bad3af5" "read-manifest" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/lnenad/image-to-ascii
[INFO] finished tweaking git repo https://github.com/lnenad/image-to-ascii
[INFO] tweaked toml for git repo https://github.com/lnenad/image-to-ascii written to /workspace/builds/worker-14/source/Cargo.toml
[INFO] crate git repo https://github.com/lnenad/image-to-ascii already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+6024cfef3a82f9a7688f07054f1650081bad3af5" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-14/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-14/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@sha256:819119df93c0f5eca3f29186f14981ef29945a311854d7222af07488600a2584" "/opt/rustwide/cargo-home/bin/cargo" "+6024cfef3a82f9a7688f07054f1650081bad3af5" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 55af3bf920b40ce89e19a952796ba41086831a1441f5e14ebabac5e75808ef8b
[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" "55af3bf920b40ce89e19a952796ba41086831a1441f5e14ebabac5e75808ef8b", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "55af3bf920b40ce89e19a952796ba41086831a1441f5e14ebabac5e75808ef8b", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "55af3bf920b40ce89e19a952796ba41086831a1441f5e14ebabac5e75808ef8b", kill_on_drop: false }`
[INFO] [stdout] 55af3bf920b40ce89e19a952796ba41086831a1441f5e14ebabac5e75808ef8b
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-14/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-14/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=forbid" "-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@sha256:819119df93c0f5eca3f29186f14981ef29945a311854d7222af07488600a2584" "/opt/rustwide/cargo-home/bin/cargo" "+6024cfef3a82f9a7688f07054f1650081bad3af5" "check" "--frozen" "--all" "--all-targets" "--message-format=json", 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] b7cf7a00412f9e32f8038c3f48b3bb53493ede30417a588d82ea0960006f98ca
[INFO] running `Command { std: "docker" "start" "-a" "b7cf7a00412f9e32f8038c3f48b3bb53493ede30417a588d82ea0960006f98ca", kill_on_drop: false }`
[INFO] [stderr]     Checking libc v0.2.33
[INFO] [stderr]     Checking scopeguard v0.3.3
[INFO] [stderr]     Checking either v1.3.0
[INFO] [stderr]    Compiling rayon-core v1.3.0
[INFO] [stderr]     Checking lazy_static v0.2.9
[INFO] [stderr]     Checking bitflags v1.0.0
[INFO] [stderr]     Checking color_quant v1.0.0
[INFO] [stderr]     Checking scoped_threadpool v0.1.8
[INFO] [stderr]     Checking inflate v0.3.3
[INFO] [stderr]     Checking num-integer v0.1.35
[INFO] [stderr]     Checking deflate v0.7.17
[INFO] [stderr]     Checking enum_primitive v0.1.1
[INFO] [stderr]     Checking gif v0.9.2
[INFO] [stderr]     Checking coco v0.1.1
[INFO] [stderr]     Checking num-iter v0.1.34
[INFO] [stderr]     Checking num-rational v0.1.40
[INFO] [stderr]     Checking num_cpus v1.7.0
[INFO] [stderr]     Checking rand v0.3.18
[INFO] [stderr]     Checking time v0.1.38
[INFO] [stderr]     Checking rayon v0.8.2
[INFO] [stderr]     Checking png v0.11.0
[INFO] [stderr]     Checking jpeg-decoder v0.1.13
[INFO] [stderr]     Checking image v0.17.0
[INFO] [stderr]     Checking imagetoascii v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/main.rs:68:76
[INFO] [stdout]    |
[INFO] [stdout] 68 | fn write_to_file(file_name: &str, contents: &String) -> Result<String, Box<Error>> {
[INFO] [stdout]    |                                                                            ^^^^^ help: use `dyn`: `dyn Error`
[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:79:79
[INFO] [stdout]    |
[INFO] [stdout] 79 | fn generate_preview(file_name: &str, contents: &String) -> Result<String, Box<Error>> {
[INFO] [stdout]    |                                                                               ^^^^^ help: use `dyn`: `dyn Error`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/main.rs:68:76
[INFO] [stdout]    |
[INFO] [stdout] 68 | fn write_to_file(file_name: &str, contents: &String) -> Result<String, Box<Error>> {
[INFO] [stdout]    |                                                                            ^^^^^ help: use `dyn`: `dyn Error`
[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:79:79
[INFO] [stdout]    |
[INFO] [stdout] 79 | fn generate_preview(file_name: &str, contents: &String) -> Result<String, Box<Error>> {
[INFO] [stdout]    |                                                                               ^^^^^ help: use `dyn`: `dyn Error`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `std::result::Result` that must be used
[INFO] [stdout]   --> src/main.rs:32:9
[INFO] [stdout]    |
[INFO] [stdout] 32 |         generate_preview(&output.replace(".txt", ".html"), &contents);
[INFO] [stdout]    |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_must_use)]` on by default
[INFO] [stdout]    = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `std::result::Result` that must be used
[INFO] [stdout]   --> src/main.rs:32:9
[INFO] [stdout]    |
[INFO] [stdout] 32 |         generate_preview(&output.replace(".txt", ".html"), &contents);
[INFO] [stdout]    |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_must_use)]` on by default
[INFO] [stdout]    = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 3 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 3 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 15.28s
[INFO] running `Command { std: "docker" "inspect" "b7cf7a00412f9e32f8038c3f48b3bb53493ede30417a588d82ea0960006f98ca", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "b7cf7a00412f9e32f8038c3f48b3bb53493ede30417a588d82ea0960006f98ca", kill_on_drop: false }`
[INFO] [stdout] b7cf7a00412f9e32f8038c3f48b3bb53493ede30417a588d82ea0960006f98ca