[INFO] cloning repository https://github.com/21aslade/rando-shuffler
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/21aslade/rando-shuffler" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2F21aslade%2Frando-shuffler", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2F21aslade%2Frando-shuffler'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 43dda7ad76389598a7a610477144de133f8cd492
[INFO] checking 21aslade/rando-shuffler against master#385fa9d845dd326c6bbfd58c22244215e431948a for never-type-fallback-to-never
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2F21aslade%2Frando-shuffler" "/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/21aslade/rando-shuffler 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/21aslade/rando-shuffler
[INFO] finished tweaking git repo https://github.com/21aslade/rando-shuffler
[INFO] tweaked toml for git repo https://github.com/21aslade/rando-shuffler written to /workspace/builds/worker-0-tc1/source/Cargo.toml
[INFO] crate git repo https://github.com/21aslade/rando-shuffler 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] 1044ac472357cfa16be2fbd91cf9a343646a574eb8ec5f583d4becf3635f3b57
[INFO] running `Command { std: "docker" "start" "-a" "1044ac472357cfa16be2fbd91cf9a343646a574eb8ec5f583d4becf3635f3b57", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "1044ac472357cfa16be2fbd91cf9a343646a574eb8ec5f583d4becf3635f3b57", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "1044ac472357cfa16be2fbd91cf9a343646a574eb8ec5f583d4becf3635f3b57", kill_on_drop: false }`
[INFO] [stdout] 1044ac472357cfa16be2fbd91cf9a343646a574eb8ec5f583d4becf3635f3b57
[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] e3abea3517496d428f1a2708131f8df205f70c95a12b3a31e97c5606583dc7a8
[INFO] running `Command { std: "docker" "start" "-a" "e3abea3517496d428f1a2708131f8df205f70c95a12b3a31e97c5606583dc7a8", kill_on_drop: false }`
[INFO] [stderr]    Compiling version_check v0.9.3
[INFO] [stderr]     Checking termcolor v1.1.2
[INFO] [stderr]     Checking fixedbitset v0.2.0
[INFO] [stderr]    Compiling indexmap v1.7.0
[INFO] [stderr]     Checking regex v1.5.4
[INFO] [stderr]     Checking codespan-reporting v0.11.1
[INFO] [stderr]    Compiling nom v7.1.0
[INFO] [stderr]     Checking petgraph v0.5.1
[INFO] [stderr]     Checking rando_parser v0.1.0 (/opt/rustwide/workdir/rando_parser)
[INFO] [stdout] warning: function `ws` is never used
[INFO] [stdout]   --> rando_parser/src/common/parser.rs:86:8
[INFO] [stdout]    |
[INFO] [stdout] 86 | pub fn ws<'a: 'b, 'b, F: 'b, O, E: ParseError<&'a str>>(
[INFO] [stdout]    |        ^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `ws` is never used
[INFO] [stdout]   --> rando_parser/src/common/parser.rs:86:8
[INFO] [stdout]    |
[INFO] [stdout] 86 | pub fn ws<'a: 'b, 'b, F: 'b, O, E: ParseError<&'a str>>(
[INFO] [stdout]    |        ^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[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]     Checking rando_core v0.1.0 (/opt/rustwide/workdir/rando_core)
[INFO] [stdout] warning: the item `DiGraph` is imported redundantly
[INFO] [stdout]  --> rando_core/src/graph.rs:1:5
[INFO] [stdout]   |
[INFO] [stdout] 1 | use petgraph::graph::DiGraph;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 2 | use petgraph::prelude::*;
[INFO] [stdout]   |     -------------------- the item `DiGraph` is already imported here
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `DiGraph` is imported redundantly
[INFO] [stdout]  --> rando_core/src/graph.rs:1:5
[INFO] [stdout]   |
[INFO] [stdout] 1 | use petgraph::graph::DiGraph;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 2 | use petgraph::prelude::*;
[INFO] [stdout]   |     -------------------- the item `DiGraph` is already imported here
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Checking rando_shuffler v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 5.51s
[INFO] running `Command { std: "docker" "inspect" "e3abea3517496d428f1a2708131f8df205f70c95a12b3a31e97c5606583dc7a8", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "e3abea3517496d428f1a2708131f8df205f70c95a12b3a31e97c5606583dc7a8", kill_on_drop: false }`
[INFO] [stdout] e3abea3517496d428f1a2708131f8df205f70c95a12b3a31e97c5606583dc7a8
[INFO] checking 21aslade/rando-shuffler against try#2d84f2737f3bd9ebfcb07f75aa198d6cf7c715d2 for never-type-fallback-to-never
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2F21aslade%2Frando-shuffler" "/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/21aslade/rando-shuffler 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/21aslade/rando-shuffler
[INFO] finished tweaking git repo https://github.com/21aslade/rando-shuffler
[INFO] tweaked toml for git repo https://github.com/21aslade/rando-shuffler written to /workspace/builds/worker-0-tc2/source/Cargo.toml
[INFO] crate git repo https://github.com/21aslade/rando-shuffler 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] 36cfa24da22e4fa2071fd270b938cadd98228189bce9a97a5488e0fd261707e3
[INFO] running `Command { std: "docker" "start" "-a" "36cfa24da22e4fa2071fd270b938cadd98228189bce9a97a5488e0fd261707e3", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "36cfa24da22e4fa2071fd270b938cadd98228189bce9a97a5488e0fd261707e3", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "36cfa24da22e4fa2071fd270b938cadd98228189bce9a97a5488e0fd261707e3", kill_on_drop: false }`
[INFO] [stdout] 36cfa24da22e4fa2071fd270b938cadd98228189bce9a97a5488e0fd261707e3
[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] 7ffaef8148bb2068ad34d43bc55bea0bacc42ae8307000646a2bc44b69fce384
[INFO] running `Command { std: "docker" "start" "-a" "7ffaef8148bb2068ad34d43bc55bea0bacc42ae8307000646a2bc44b69fce384", kill_on_drop: false }`
[INFO] [stderr]    Compiling version_check v0.9.3
[INFO] [stderr]     Checking termcolor v1.1.2
[INFO] [stderr]     Checking fixedbitset v0.2.0
[INFO] [stderr]    Compiling indexmap v1.7.0
[INFO] [stderr]     Checking regex v1.5.4
[INFO] [stderr]     Checking codespan-reporting v0.11.1
[INFO] [stderr]    Compiling nom v7.1.0
[INFO] [stderr]     Checking petgraph v0.5.1
[INFO] [stderr]     Checking rando_parser v0.1.0 (/opt/rustwide/workdir/rando_parser)
[INFO] [stdout] warning: function `ws` is never used
[INFO] [stdout]   --> rando_parser/src/common/parser.rs:86:8
[INFO] [stdout]    |
[INFO] [stdout] 86 | pub fn ws<'a: 'b, 'b, F: 'b, O, E: ParseError<&'a str>>(
[INFO] [stdout]    |        ^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Checking rando_core v0.1.0 (/opt/rustwide/workdir/rando_core)
[INFO] [stdout] warning: the item `DiGraph` is imported redundantly
[INFO] [stdout]  --> rando_core/src/graph.rs:1:5
[INFO] [stdout]   |
[INFO] [stdout] 1 | use petgraph::graph::DiGraph;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 2 | use petgraph::prelude::*;
[INFO] [stdout]   |     -------------------- the item `DiGraph` is already imported here
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `DiGraph` is imported redundantly
[INFO] [stdout]  --> rando_core/src/graph.rs:1:5
[INFO] [stdout]   |
[INFO] [stdout] 1 | use petgraph::graph::DiGraph;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 2 | use petgraph::prelude::*;
[INFO] [stdout]   |     -------------------- the item `DiGraph` is already imported here
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Checking rando_shuffler v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `ws` is never used
[INFO] [stdout]   --> rando_parser/src/common/parser.rs:86:8
[INFO] [stdout]    |
[INFO] [stdout] 86 | pub fn ws<'a: 'b, 'b, F: 'b, O, E: ParseError<&'a str>>(
[INFO] [stdout]    |        ^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 4.98s
[INFO] running `Command { std: "docker" "inspect" "7ffaef8148bb2068ad34d43bc55bea0bacc42ae8307000646a2bc44b69fce384", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "7ffaef8148bb2068ad34d43bc55bea0bacc42ae8307000646a2bc44b69fce384", kill_on_drop: false }`
[INFO] [stdout] 7ffaef8148bb2068ad34d43bc55bea0bacc42ae8307000646a2bc44b69fce384