[INFO] cloning repository https://github.com/landon-thull/grrs
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/landon-thull/grrs" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Flandon-thull%2Fgrrs", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Flandon-thull%2Fgrrs'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] b28c0ff46f0ae5ba7e4852fd6b9d854fa5b74b35
[INFO] checking landon-thull/grrs against master#385fa9d845dd326c6bbfd58c22244215e431948a for never-type-fallback-to-never
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Flandon-thull%2Fgrrs" "/workspace/builds/worker-0-tc1/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-0-tc1/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/landon-thull/grrs on toolchain 385fa9d845dd326c6bbfd58c22244215e431948a
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+385fa9d845dd326c6bbfd58c22244215e431948a" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/landon-thull/grrs
[INFO] finished tweaking git repo https://github.com/landon-thull/grrs
[INFO] tweaked toml for git repo https://github.com/landon-thull/grrs written to /workspace/builds/worker-0-tc1/source/Cargo.toml
[INFO] crate git repo https://github.com/landon-thull/grrs 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" "+385fa9d845dd326c6bbfd58c22244215e431948a" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-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@sha256:2788e3201cd34a07e3172128adcd8b3090168a8e3bcc40d7c032b9dda1df7d1c" "/opt/rustwide/cargo-home/bin/cargo" "+385fa9d845dd326c6bbfd58c22244215e431948a" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 07a068389e78186b18f344bf4c7652a96b0147e85ed09af06ac4ff2d06ec0f9f
[INFO] running `Command { std: "docker" "start" "-a" "07a068389e78186b18f344bf4c7652a96b0147e85ed09af06ac4ff2d06ec0f9f", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "07a068389e78186b18f344bf4c7652a96b0147e85ed09af06ac4ff2d06ec0f9f", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "07a068389e78186b18f344bf4c7652a96b0147e85ed09af06ac4ff2d06ec0f9f", kill_on_drop: false }`
[INFO] [stdout] 07a068389e78186b18f344bf4c7652a96b0147e85ed09af06ac4ff2d06ec0f9f
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-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@sha256:2788e3201cd34a07e3172128adcd8b3090168a8e3bcc40d7c032b9dda1df7d1c" "/opt/rustwide/cargo-home/bin/cargo" "+385fa9d845dd326c6bbfd58c22244215e431948a" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 30954e49d9c4691a1e9f75305b19949848e65fd59ad02ede97835b63f0b5dfed
[INFO] running `Command { std: "docker" "start" "-a" "30954e49d9c4691a1e9f75305b19949848e65fd59ad02ede97835b63f0b5dfed", kill_on_drop: false }`
[INFO] [stderr]     Checking memchr v2.7.1
[INFO] [stderr]     Checking regex-syntax v0.8.2
[INFO] [stderr]    Compiling autocfg v1.1.0
[INFO] [stderr]     Checking anstyle v1.0.6
[INFO] [stderr]    Compiling crossbeam-utils v0.8.19
[INFO] [stderr]    Compiling proc-macro2 v1.0.78
[INFO] [stderr]    Compiling unicode-ident v1.0.12
[INFO] [stderr]     Checking utf8parse v0.2.1
[INFO] [stderr]     Checking anstyle-parse v0.2.3
[INFO] [stderr]     Checking anstyle-query v1.0.2
[INFO] [stderr]     Checking same-file v1.0.6
[INFO] [stderr]    Compiling doc-comment v0.3.3
[INFO] [stderr]    Compiling libc v0.2.153
[INFO] [stderr]     Checking predicates-core v1.0.6
[INFO] [stderr]     Checking log v0.4.21
[INFO] [stderr]     Checking aho-corasick v1.1.2
[INFO] [stderr]    Compiling num-traits v0.2.18
[INFO] [stderr]     Checking colorchoice v1.0.0
[INFO] [stderr]    Compiling rustix v0.38.31
[INFO] [stderr]     Checking bitflags v2.4.2
[INFO] [stderr]     Checking anstream v0.6.13
[INFO] [stderr]     Checking walkdir v2.5.0
[INFO] [stderr]     Checking crossbeam-epoch v0.9.18
[INFO] [stderr]     Checking termtree v0.4.1
[INFO] [stderr]     Checking normalize-line-endings v0.3.0
[INFO] [stderr]     Checking strsim v0.11.0
[INFO] [stderr]    Compiling quote v1.0.35
[INFO] [stderr]     Checking difflib v0.4.0
[INFO] [stderr]    Compiling heck v0.4.1
[INFO] [stderr]    Compiling anyhow v1.0.80
[INFO] [stderr]     Checking crossbeam-deque v0.8.5
[INFO] [stderr]    Compiling syn v2.0.52
[INFO] [stderr]     Checking linux-raw-sys v0.4.13
[INFO] [stderr]     Checking clap_lex v0.7.0
[INFO] [stderr]     Checking predicates-tree v1.0.9
[INFO] [stderr]     Checking clap_builder v4.5.1
[INFO] [stderr]    Compiling assert_cmd v2.0.14
[INFO] [stderr]     Checking cfg-if v1.0.0
[INFO] [stderr]     Checking fastrand v2.0.1
[INFO] [stderr]     Checking float-cmp v0.9.0
[INFO] [stderr]     Checking wait-timeout v0.2.0
[INFO] [stderr]     Checking regex-automata v0.4.5
[INFO] [stderr]     Checking tempfile v3.10.1
[INFO] [stderr]    Compiling clap_derive v4.5.0
[INFO] [stderr]     Checking bstr v1.9.1
[INFO] [stderr]     Checking regex v1.10.3
[INFO] [stderr]     Checking predicates v3.1.0
[INFO] [stderr]     Checking globset v0.4.14
[INFO] [stderr]     Checking ignore v0.4.22
[INFO] [stderr]     Checking globwalk v0.9.1
[INFO] [stderr]     Checking assert_fs v1.1.1
[INFO] [stderr]     Checking clap v4.5.1
[INFO] [stderr]     Checking grrs v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused `Result` that must be used
[INFO] [stdout]   --> src/main.rs:27:13
[INFO] [stdout]    |
[INFO] [stdout] 27 |             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)]` on by default
[INFO] [stdout]    = note: this warning originates in the macro `writeln` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `Result` that must be used
[INFO] [stdout]   --> src/main.rs:27:13
[INFO] [stdout]    |
[INFO] [stdout] 27 |             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)]` on by default
[INFO] [stdout]    = note: this warning originates in the macro `writeln` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 24.11s
[INFO] running `Command { std: "docker" "inspect" "30954e49d9c4691a1e9f75305b19949848e65fd59ad02ede97835b63f0b5dfed", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "30954e49d9c4691a1e9f75305b19949848e65fd59ad02ede97835b63f0b5dfed", kill_on_drop: false }`
[INFO] [stdout] 30954e49d9c4691a1e9f75305b19949848e65fd59ad02ede97835b63f0b5dfed
[INFO] checking landon-thull/grrs against try#2d84f2737f3bd9ebfcb07f75aa198d6cf7c715d2 for never-type-fallback-to-never
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Flandon-thull%2Fgrrs" "/workspace/builds/worker-0-tc2/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-0-tc2/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/landon-thull/grrs on toolchain 2d84f2737f3bd9ebfcb07f75aa198d6cf7c715d2
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+2d84f2737f3bd9ebfcb07f75aa198d6cf7c715d2" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/landon-thull/grrs
[INFO] finished tweaking git repo https://github.com/landon-thull/grrs
[INFO] tweaked toml for git repo https://github.com/landon-thull/grrs written to /workspace/builds/worker-0-tc2/source/Cargo.toml
[INFO] crate git repo https://github.com/landon-thull/grrs 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" "+2d84f2737f3bd9ebfcb07f75aa198d6cf7c715d2" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc2/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@sha256:2788e3201cd34a07e3172128adcd8b3090168a8e3bcc40d7c032b9dda1df7d1c" "/opt/rustwide/cargo-home/bin/cargo" "+2d84f2737f3bd9ebfcb07f75aa198d6cf7c715d2" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] f1de78cacc4a6ace59a1071f7527390ef1782e2ca5983b2280aa109a4e496b7d
[INFO] running `Command { std: "docker" "start" "-a" "f1de78cacc4a6ace59a1071f7527390ef1782e2ca5983b2280aa109a4e496b7d", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "f1de78cacc4a6ace59a1071f7527390ef1782e2ca5983b2280aa109a4e496b7d", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "f1de78cacc4a6ace59a1071f7527390ef1782e2ca5983b2280aa109a4e496b7d", kill_on_drop: false }`
[INFO] [stdout] f1de78cacc4a6ace59a1071f7527390ef1782e2ca5983b2280aa109a4e496b7d
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc2/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@sha256:2788e3201cd34a07e3172128adcd8b3090168a8e3bcc40d7c032b9dda1df7d1c" "/opt/rustwide/cargo-home/bin/cargo" "+2d84f2737f3bd9ebfcb07f75aa198d6cf7c715d2" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 1ade17a9fc68bdf7824adc2c8c3bf25698db66e87c7e16ef43800a62c963538c
[INFO] running `Command { std: "docker" "start" "-a" "1ade17a9fc68bdf7824adc2c8c3bf25698db66e87c7e16ef43800a62c963538c", kill_on_drop: false }`
[INFO] [stderr]     Checking memchr v2.7.1
[INFO] [stderr]     Checking regex-syntax v0.8.2
[INFO] [stderr]     Checking anstyle v1.0.6
[INFO] [stderr]    Compiling proc-macro2 v1.0.78
[INFO] [stderr]    Compiling crossbeam-utils v0.8.19
[INFO] [stderr]    Compiling autocfg v1.1.0
[INFO] [stderr]    Compiling unicode-ident v1.0.12
[INFO] [stderr]     Checking utf8parse v0.2.1
[INFO] [stderr]     Checking anstyle-parse v0.2.3
[INFO] [stderr]     Checking predicates-core v1.0.6
[INFO] [stderr]     Checking bitflags v2.4.2
[INFO] [stderr]     Checking same-file v1.0.6
[INFO] [stderr]    Compiling doc-comment v0.3.3
[INFO] [stderr]     Checking colorchoice v1.0.0
[INFO] [stderr]     Checking anstyle-query v1.0.2
[INFO] [stderr]    Compiling libc v0.2.153
[INFO] [stderr]     Checking log v0.4.21
[INFO] [stderr]    Compiling num-traits v0.2.18
[INFO] [stderr]    Compiling rustix v0.38.31
[INFO] [stderr]     Checking aho-corasick v1.1.2
[INFO] [stderr]     Checking anstream v0.6.13
[INFO] [stderr]     Checking walkdir v2.5.0
[INFO] [stderr]    Compiling heck v0.4.1
[INFO] [stderr]     Checking crossbeam-epoch v0.9.18
[INFO] [stderr]    Compiling quote v1.0.35
[INFO] [stderr]     Checking termtree v0.4.1
[INFO] [stderr]     Checking crossbeam-deque v0.8.5
[INFO] [stderr]     Checking difflib v0.4.0
[INFO] [stderr]    Compiling syn v2.0.52
[INFO] [stderr]    Compiling anyhow v1.0.80
[INFO] [stderr]     Checking linux-raw-sys v0.4.13
[INFO] [stderr]     Checking clap_lex v0.7.0
[INFO] [stderr]     Checking normalize-line-endings v0.3.0
[INFO] [stderr]     Checking strsim v0.11.0
[INFO] [stderr]     Checking predicates-tree v1.0.9
[INFO] [stderr]     Checking clap_builder v4.5.1
[INFO] [stderr]     Checking float-cmp v0.9.0
[INFO] [stderr]     Checking fastrand v2.0.1
[INFO] [stderr]     Checking cfg-if v1.0.0
[INFO] [stderr]    Compiling assert_cmd v2.0.14
[INFO] [stderr]     Checking wait-timeout v0.2.0
[INFO] [stderr]     Checking regex-automata v0.4.5
[INFO] [stderr]     Checking tempfile v3.10.1
[INFO] [stderr]    Compiling clap_derive v4.5.0
[INFO] [stderr]     Checking bstr v1.9.1
[INFO] [stderr]     Checking regex v1.10.3
[INFO] [stderr]     Checking predicates v3.1.0
[INFO] [stderr]     Checking globset v0.4.14
[INFO] [stderr]     Checking ignore v0.4.22
[INFO] [stderr]     Checking clap v4.5.1
[INFO] [stderr]     Checking grrs v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused `Result` that must be used
[INFO] [stdout]   --> src/main.rs:27:13
[INFO] [stdout]    |
[INFO] [stdout] 27 |             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)]` on by default
[INFO] [stdout]    = note: this warning originates in the macro `writeln` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Checking globwalk v0.9.1
[INFO] [stderr]     Checking assert_fs v1.1.1
[INFO] [stdout] warning: unused `Result` that must be used
[INFO] [stdout]   --> src/main.rs:27:13
[INFO] [stdout]    |
[INFO] [stdout] 27 |             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)]` on by default
[INFO] [stdout]    = note: this warning originates in the macro `writeln` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 20.72s
[INFO] running `Command { std: "docker" "inspect" "1ade17a9fc68bdf7824adc2c8c3bf25698db66e87c7e16ef43800a62c963538c", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "1ade17a9fc68bdf7824adc2c8c3bf25698db66e87c7e16ef43800a62c963538c", kill_on_drop: false }`
[INFO] [stdout] 1ade17a9fc68bdf7824adc2c8c3bf25698db66e87c7e16ef43800a62c963538c