[INFO] fetching crate ju-tcs-rust-23-29 0.1.0...
[INFO] testing ju-tcs-rust-23-29-0.1.0 against master#562dee4820c458d823175268e41601d4c060588a for pr-154210-1
[INFO] extracting crate ju-tcs-rust-23-29 0.1.0 into /workspace/builds/worker-3-tc1/source
[INFO] removed /workspace/builds/worker-3-tc1/source/rust-toolchain.toml
[INFO] started tweaking crates.io crate ju-tcs-rust-23-29 0.1.0
[INFO] finished tweaking crates.io crate ju-tcs-rust-23-29 0.1.0
[INFO] tweaked toml for crates.io crate ju-tcs-rust-23-29 0.1.0 written to /workspace/builds/worker-3-tc1/source/Cargo.toml
[INFO] validating manifest of crates.io crate ju-tcs-rust-23-29 0.1.0 on toolchain 562dee4820c458d823175268e41601d4c060588a
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+562dee4820c458d823175268e41601d4c060588a" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+562dee4820c458d823175268e41601d4c060588a" "generate-lockfile" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+562dee4820c458d823175268e41601d4c060588a" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-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:d429b63d4308055ea97f60fb1d3dfca48854a00942f1bd2ad806beaf015945ec" "/opt/rustwide/cargo-home/bin/cargo" "+562dee4820c458d823175268e41601d4c060588a" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 16f4db9f10af1234a20998e9de9b1471c62a6cd48c7c4f4b780e82ebcf091cd9
[INFO] running `Command { std: "docker" "start" "-a" "16f4db9f10af1234a20998e9de9b1471c62a6cd48c7c4f4b780e82ebcf091cd9", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "16f4db9f10af1234a20998e9de9b1471c62a6cd48c7c4f4b780e82ebcf091cd9", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "16f4db9f10af1234a20998e9de9b1471c62a6cd48c7c4f4b780e82ebcf091cd9", kill_on_drop: false }`
[INFO] [stdout] 16f4db9f10af1234a20998e9de9b1471c62a6cd48c7c4f4b780e82ebcf091cd9
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-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:d429b63d4308055ea97f60fb1d3dfca48854a00942f1bd2ad806beaf015945ec" "/opt/rustwide/cargo-home/bin/cargo" "+562dee4820c458d823175268e41601d4c060588a" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 2eee9b478d581c023b00978fc1148659e3831407c21239b60ba5a3189d2075c6
[INFO] running `Command { std: "docker" "start" "-a" "2eee9b478d581c023b00978fc1148659e3831407c21239b60ba5a3189d2075c6", kill_on_drop: false }`
[INFO] [stderr]    Compiling ju-tcs-rust-23-29 v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: value assigned to `lines` is never read
[INFO] [stdout]  --> src/lib.rs:5:34
[INFO] [stdout]   |
[INFO] [stdout] 5 |     let mut lines: Vec<String> = Vec::new();
[INFO] [stdout]   |                                  ^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = help: maybe it is overwritten before being read?
[INFO] [stdout]   = note: `#[warn(unused_assignments)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: value assigned to `lines` is never read
[INFO] [stdout]   --> src/lib.rs:17:34
[INFO] [stdout]    |
[INFO] [stdout] 17 |     let mut lines: Vec<String> = Vec::new();
[INFO] [stdout]    |                                  ^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = help: maybe it is overwritten before being read?
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 0.30s
[INFO] running `Command { std: "docker" "inspect" "2eee9b478d581c023b00978fc1148659e3831407c21239b60ba5a3189d2075c6", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "2eee9b478d581c023b00978fc1148659e3831407c21239b60ba5a3189d2075c6", kill_on_drop: false }`
[INFO] [stdout] 2eee9b478d581c023b00978fc1148659e3831407c21239b60ba5a3189d2075c6
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-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:d429b63d4308055ea97f60fb1d3dfca48854a00942f1bd2ad806beaf015945ec" "/opt/rustwide/cargo-home/bin/cargo" "+562dee4820c458d823175268e41601d4c060588a" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] aca254421acdd1dc5dddebb6b11cfba2b8db94ee05496586232cabf55c6e46d4
[INFO] running `Command { std: "docker" "start" "-a" "aca254421acdd1dc5dddebb6b11cfba2b8db94ee05496586232cabf55c6e46d4", kill_on_drop: false }`
[INFO] [stdout] warning: value assigned to `lines` is never read
[INFO] [stdout]  --> src/lib.rs:5:34
[INFO] [stdout]   |
[INFO] [stdout] 5 |     let mut lines: Vec<String> = Vec::new();
[INFO] [stdout]   |                                  ^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = help: maybe it is overwritten before being read?
[INFO] [stdout]   = note: `#[warn(unused_assignments)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]    Compiling ju-tcs-rust-23-29 v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: value assigned to `lines` is never read
[INFO] [stdout]   --> src/lib.rs:17:34
[INFO] [stdout]    |
[INFO] [stdout] 17 |     let mut lines: Vec<String> = Vec::new();
[INFO] [stdout]    |                                  ^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = help: maybe it is overwritten before being read?
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: value assigned to `lines` is never read
[INFO] [stdout]  --> src/lib.rs:5:34
[INFO] [stdout]   |
[INFO] [stdout] 5 |     let mut lines: Vec<String> = Vec::new();
[INFO] [stdout]   |                                  ^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = help: maybe it is overwritten before being read?
[INFO] [stdout]   = note: `#[warn(unused_assignments)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: value assigned to `lines` is never read
[INFO] [stdout]   --> src/lib.rs:17:34
[INFO] [stdout]    |
[INFO] [stdout] 17 |     let mut lines: Vec<String> = Vec::new();
[INFO] [stdout]    |                                  ^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = help: maybe it is overwritten before being read?
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `test` profile [unoptimized + debuginfo] target(s) in 0.30s
[INFO] running `Command { std: "docker" "inspect" "aca254421acdd1dc5dddebb6b11cfba2b8db94ee05496586232cabf55c6e46d4", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "aca254421acdd1dc5dddebb6b11cfba2b8db94ee05496586232cabf55c6e46d4", kill_on_drop: false }`
[INFO] [stdout] aca254421acdd1dc5dddebb6b11cfba2b8db94ee05496586232cabf55c6e46d4
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-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:d429b63d4308055ea97f60fb1d3dfca48854a00942f1bd2ad806beaf015945ec" "/opt/rustwide/cargo-home/bin/cargo" "+562dee4820c458d823175268e41601d4c060588a" "test" "--frozen", kill_on_drop: false }`
[INFO] [stdout] 0e421676e9b75532602362867bcf3d2f8f8289abf551a832c75ef5841682fb12
[INFO] running `Command { std: "docker" "start" "-a" "0e421676e9b75532602362867bcf3d2f8f8289abf551a832c75ef5841682fb12", kill_on_drop: false }`
[INFO] [stderr] warning: value assigned to `lines` is never read
[INFO] [stderr]  --> src/lib.rs:5:34
[INFO] [stderr]   |
[INFO] [stderr] 5 |     let mut lines: Vec<String> = Vec::new();
[INFO] [stderr]   |                                  ^^^^^^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = help: maybe it is overwritten before being read?
[INFO] [stderr]   = note: `#[warn(unused_assignments)]` (part of `#[warn(unused)]`) on by default
[INFO] [stderr] 
[INFO] [stderr] warning: value assigned to `lines` is never read
[INFO] [stderr]   --> src/lib.rs:17:34
[INFO] [stderr]    |
[INFO] [stderr] 17 |     let mut lines: Vec<String> = Vec::new();
[INFO] [stderr]    |                                  ^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = help: maybe it is overwritten before being read?
[INFO] [stderr] 
[INFO] [stderr] warning: `ju-tcs-rust-23-29` (lib) generated 2 warnings
[INFO] [stderr] warning: `ju-tcs-rust-23-29` (lib test) generated 2 warnings (2 duplicates)
[INFO] [stderr]     Finished `test` profile [unoptimized + debuginfo] target(s) in 0.02s
[INFO] [stderr]      Running unittests src/lib.rs (/opt/rustwide/target/debug/deps/ju_tcs_rust_23_29-0771a079203fefde)
[INFO] [stdout] 
[INFO] [stderr]    Doc-tests ju_tcs_rust_23_29
[INFO] [stdout] running 0 tests
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 0 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.00s
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] running 0 tests
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 0 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.00s
[INFO] [stdout] 
[INFO] running `Command { std: "docker" "inspect" "0e421676e9b75532602362867bcf3d2f8f8289abf551a832c75ef5841682fb12", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "0e421676e9b75532602362867bcf3d2f8f8289abf551a832c75ef5841682fb12", kill_on_drop: false }`
[INFO] [stdout] 0e421676e9b75532602362867bcf3d2f8f8289abf551a832c75ef5841682fb12