[INFO] fetching crate tacoda_grrs 0.1.3...
[INFO] building tacoda_grrs-0.1.3 against master#c7f6aa2869acdbf014d094c6e427e554e160b6db for pr-146237-2
[INFO] extracting crate tacoda_grrs 0.1.3 into /workspace/builds/worker-1-tc1/source
[INFO] started tweaking crates.io crate tacoda_grrs 0.1.3
[INFO] finished tweaking crates.io crate tacoda_grrs 0.1.3
[INFO] tweaked toml for crates.io crate tacoda_grrs 0.1.3 written to /workspace/builds/worker-1-tc1/source/Cargo.toml
[INFO] validating manifest of crates.io crate tacoda_grrs 0.1.3 on toolchain c7f6aa2869acdbf014d094c6e427e554e160b6db
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+c7f6aa2869acdbf014d094c6e427e554e160b6db" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate crates.io crate tacoda_grrs 0.1.3 already has a lockfile, it will not be regenerated
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+c7f6aa2869acdbf014d094c6e427e554e160b6db" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
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[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-tc1/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" "ghcr.io/rust-lang/crates-build-env/linux@sha256:e90291280db7d1fac5b66fc6dad9f9662629e7365a55743daf9bdf73ebc4ea79" "/opt/rustwide/cargo-home/bin/cargo" "+c7f6aa2869acdbf014d094c6e427e554e160b6db" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 997621b5a09d715d02aaece4cacbbbe3507588ea59ea8a4a699f401d0a51d8c5
[INFO] running `Command { std: "docker" "start" "-a" "997621b5a09d715d02aaece4cacbbbe3507588ea59ea8a4a699f401d0a51d8c5", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "997621b5a09d715d02aaece4cacbbbe3507588ea59ea8a4a699f401d0a51d8c5", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "997621b5a09d715d02aaece4cacbbbe3507588ea59ea8a4a699f401d0a51d8c5", kill_on_drop: false }`
[INFO] [stdout] 997621b5a09d715d02aaece4cacbbbe3507588ea59ea8a4a699f401d0a51d8c5
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-tc1/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" "RUSTDOCFLAGS=--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" "ghcr.io/rust-lang/crates-build-env/linux@sha256:e90291280db7d1fac5b66fc6dad9f9662629e7365a55743daf9bdf73ebc4ea79" "/opt/rustwide/cargo-home/bin/cargo" "+c7f6aa2869acdbf014d094c6e427e554e160b6db" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 5042054e9787094ae2513c3d54a0998c3219dcbd14c9ea37c683056e9e0e7f47
[INFO] running `Command { std: "docker" "start" "-a" "5042054e9787094ae2513c3d54a0998c3219dcbd14c9ea37c683056e9e0e7f47", kill_on_drop: false }`
[INFO] [stderr]    Compiling libc v0.2.66
[INFO] [stderr]    Compiling syn v0.15.36
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[INFO] [stderr]    Compiling serde v1.0.92
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[INFO] [stderr]    Compiling ryu v0.2.8
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[INFO] [stderr]    Compiling ucd-util v0.1.3
[INFO] [stderr]    Compiling failure_derive v0.1.5
[INFO] [stderr]    Compiling regex v1.1.7
[INFO] [stderr]    Compiling ppv-lite86 v0.2.6
[INFO] [stderr]    Compiling quote v0.6.12
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[INFO] [stderr]    Compiling thread_local v0.3.6
[INFO] [stderr]    Compiling itoa v0.4.4
[INFO] [stderr]    Compiling regex-syntax v0.6.7
[INFO] [stderr]    Compiling predicates-core v1.0.0
[INFO] [stderr]    Compiling unicode-width v0.1.5
[INFO] [stderr]    Compiling rustc-demangle v0.1.15
[INFO] [stderr]    Compiling c2-chacha v0.2.3
[INFO] [stderr]    Compiling utf8-ranges v1.0.3
[INFO] [stderr]    Compiling unicode-segmentation v1.3.0
[INFO] [stderr]    Compiling textwrap v0.11.0
[INFO] [stderr]    Compiling log v0.4.6
[INFO] [stderr]    Compiling normalize-line-endings v0.2.2
[INFO] [stderr]    Compiling vec_map v0.8.1
[INFO] [stderr]    Compiling ansi_term v0.11.0
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[INFO] [stderr]    Compiling aho-corasick v0.7.3
[INFO] [stderr]    Compiling atty v0.2.11
[INFO] [stderr]    Compiling rand_core v0.5.1
[INFO] [stderr]    Compiling heck v0.3.1
[INFO] [stderr]    Compiling treeline v0.1.0
[INFO] [stderr]    Compiling clap v2.33.0
[INFO] [stderr]    Compiling remove_dir_all v0.5.2
[INFO] [stderr]    Compiling predicates-tree v1.0.0
[INFO] [stderr]    Compiling backtrace-sys v0.1.28
[INFO] [stderr]    Compiling rand_chacha v0.2.1
[INFO] [stderr]    Compiling rand v0.7.2
[INFO] [stderr]    Compiling tempfile v3.1.0
[INFO] [stderr]    Compiling float-cmp v0.4.0
[INFO] [stderr]    Compiling synstructure v0.10.2
[INFO] [stderr]    Compiling serde_derive v1.0.92
[INFO] [stderr]    Compiling structopt-derive v0.2.16
[INFO] [stderr]    Compiling failure v0.1.5
[INFO] [stderr]    Compiling exitfailure v0.5.1
[INFO] [stderr]    Compiling structopt v0.2.16
[INFO] [stderr]    Compiling predicates v1.0.1
[INFO] [stderr]    Compiling serde_json v1.0.39
[INFO] [stderr]    Compiling assert_cmd v0.11.1
[INFO] [stderr]    Compiling tacoda_grrs v0.1.3 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused `Result` that must be used
[INFO] [stdout]   --> src/lib.rs:12:13
[INFO] [stdout]    |
[INFO] [stdout] 12 |             writeln!(writer, "{}", line);
[INFO] [stdout]    |             ^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout]    = note: `#[warn(unused_must_use)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] help: use `let _ = ...` to ignore the resulting value
[INFO] [stdout]    |
[INFO] [stdout] 12 |             let _ = writeln!(writer, "{}", line);
[INFO] [stdout]    |             +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 19.31s
[INFO] running `Command { std: "docker" "inspect" "5042054e9787094ae2513c3d54a0998c3219dcbd14c9ea37c683056e9e0e7f47", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "5042054e9787094ae2513c3d54a0998c3219dcbd14c9ea37c683056e9e0e7f47", kill_on_drop: false }`
[INFO] [stdout] 5042054e9787094ae2513c3d54a0998c3219dcbd14c9ea37c683056e9e0e7f47
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-tc1/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" "RUSTDOCFLAGS=--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" "ghcr.io/rust-lang/crates-build-env/linux@sha256:e90291280db7d1fac5b66fc6dad9f9662629e7365a55743daf9bdf73ebc4ea79" "/opt/rustwide/cargo-home/bin/cargo" "+c7f6aa2869acdbf014d094c6e427e554e160b6db" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] ce9873d61c1c998248099e97d9b7708d8267c437f9055e065f63a22e5a5d432c
[INFO] running `Command { std: "docker" "start" "-a" "ce9873d61c1c998248099e97d9b7708d8267c437f9055e065f63a22e5a5d432c", kill_on_drop: false }`
[INFO] [stderr]    Compiling tacoda_grrs v0.1.3 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused `Result` that must be used
[INFO] [stdout]   --> src/lib.rs:12:13
[INFO] [stdout]    |
[INFO] [stdout] 12 |             writeln!(writer, "{}", line);
[INFO] [stdout]    |             ^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout]    = note: `#[warn(unused_must_use)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] help: use `let _ = ...` to ignore the resulting value
[INFO] [stdout]    |
[INFO] [stdout] 12 |             let _ = writeln!(writer, "{}", line);
[INFO] [stdout]    |             +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `Result` that must be used
[INFO] [stdout]   --> src/lib.rs:12:13
[INFO] [stdout]    |
[INFO] [stdout] 12 |             writeln!(writer, "{}", line);
[INFO] [stdout]    |             ^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout]    = note: `#[warn(unused_must_use)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] help: use `let _ = ...` to ignore the resulting value
[INFO] [stdout]    |
[INFO] [stdout] 12 |             let _ = writeln!(writer, "{}", line);
[INFO] [stdout]    |             +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `self`
[INFO] [stdout]  --> tests/cli.rs:5:15
[INFO] [stdout]   |
[INFO] [stdout] 5 | use std::io::{self, Write};
[INFO] [stdout]   |               ^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]  --> tests/cli.rs:8:42
[INFO] [stdout]   |
[INFO] [stdout] 8 | fn file_doesnt_exist() -> Result<(), Box<std::error::Error>> {
[INFO] [stdout]   |                                          ^^^^^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = warning: this is accepted in the current edition (Rust 2018) but is a hard error in Rust 2021!
[INFO] [stdout]   = note: for more information, see <https://doc.rust-lang.org/edition-guide/rust-2021/warnings-promoted-to-error.html>
[INFO] [stdout]   = note: `#[warn(bare_trait_objects)]` (part of `#[warn(rust_2021_compatibility)]`) on by default
[INFO] [stdout] help: if this is a dyn-compatible trait, use `dyn`
[INFO] [stdout]   |
[INFO] [stdout] 8 | fn file_doesnt_exist() -> Result<(), Box<dyn std::error::Error>> {
[INFO] [stdout]   |                                          +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> tests/cli.rs:20:45
[INFO] [stdout]    |
[INFO] [stdout] 20 | fn find_content_in_file() -> Result<(), Box<std::error::Error>> {
[INFO] [stdout]    |                                             ^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = warning: this is accepted in the current edition (Rust 2018) but is a hard error in Rust 2021!
[INFO] [stdout]    = note: for more information, see <https://doc.rust-lang.org/edition-guide/rust-2021/warnings-promoted-to-error.html>
[INFO] [stdout] help: if this is a dyn-compatible trait, use `dyn`
[INFO] [stdout]    |
[INFO] [stdout] 20 | fn find_content_in_file() -> Result<(), Box<dyn std::error::Error>> {
[INFO] [stdout]    |                                             +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `test` profile [unoptimized + debuginfo] target(s) in 0.82s
[INFO] running `Command { std: "docker" "inspect" "ce9873d61c1c998248099e97d9b7708d8267c437f9055e065f63a22e5a5d432c", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "ce9873d61c1c998248099e97d9b7708d8267c437f9055e065f63a22e5a5d432c", kill_on_drop: false }`
[INFO] [stdout] ce9873d61c1c998248099e97d9b7708d8267c437f9055e065f63a22e5a5d432c
