[INFO] cloning repository https://github.com/bfollington/note-gene-swapping
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/bfollington/note-gene-swapping" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fbfollington%2Fnote-gene-swapping", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fbfollington%2Fnote-gene-swapping'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] fe704f035b2d350681cb7bcccad4c835eb50bc11
[INFO] checking bfollington/note-gene-swapping against master#385fa9d845dd326c6bbfd58c22244215e431948a for never-type-fallback-to-never
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fbfollington%2Fnote-gene-swapping" "/workspace/builds/worker-3-tc1/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-3-tc1/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/bfollington/note-gene-swapping 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/bfollington/note-gene-swapping
[INFO] finished tweaking git repo https://github.com/bfollington/note-gene-swapping
[INFO] tweaked toml for git repo https://github.com/bfollington/note-gene-swapping written to /workspace/builds/worker-3-tc1/source/Cargo.toml
[INFO] crate git repo https://github.com/bfollington/note-gene-swapping 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-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@sha256:2788e3201cd34a07e3172128adcd8b3090168a8e3bcc40d7c032b9dda1df7d1c" "/opt/rustwide/cargo-home/bin/cargo" "+385fa9d845dd326c6bbfd58c22244215e431948a" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] cf1be16e42e8733952e5d94a7b3da0cbbdad2d1c46afdd68bbe3911260c6cf50
[INFO] running `Command { std: "docker" "start" "-a" "cf1be16e42e8733952e5d94a7b3da0cbbdad2d1c46afdd68bbe3911260c6cf50", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "cf1be16e42e8733952e5d94a7b3da0cbbdad2d1c46afdd68bbe3911260c6cf50", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "cf1be16e42e8733952e5d94a7b3da0cbbdad2d1c46afdd68bbe3911260c6cf50", kill_on_drop: false }`
[INFO] [stdout] cf1be16e42e8733952e5d94a7b3da0cbbdad2d1c46afdd68bbe3911260c6cf50
[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@sha256:2788e3201cd34a07e3172128adcd8b3090168a8e3bcc40d7c032b9dda1df7d1c" "/opt/rustwide/cargo-home/bin/cargo" "+385fa9d845dd326c6bbfd58c22244215e431948a" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] e7b71d8435fca13a878030794f3bd2b9f89fb886dd1fe615b6122ae8eafcf024
[INFO] running `Command { std: "docker" "start" "-a" "e7b71d8435fca13a878030794f3bd2b9f89fb886dd1fe615b6122ae8eafcf024", kill_on_drop: false }`
[INFO] [stderr]    Compiling libc v0.2.135
[INFO] [stderr]    Compiling memchr v2.5.0
[INFO] [stderr]     Checking ppv-lite86 v0.2.16
[INFO] [stderr]     Checking regex-syntax v0.6.27
[INFO] [stderr]     Checking aho-corasick v0.7.19
[INFO] [stderr]     Checking getrandom v0.2.8
[INFO] [stderr]     Checking rand_core v0.6.4
[INFO] [stderr]     Checking rand_chacha v0.3.1
[INFO] [stderr]     Checking rand v0.8.5
[INFO] [stderr]     Checking regex v1.6.0
[INFO] [stderr]     Checking note-gene-swapping v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: function `count_unique_terms` is never used
[INFO] [stdout]   --> src/mutation.rs:28:8
[INFO] [stdout]    |
[INFO] [stdout] 28 | pub fn count_unique_terms(g: &Genome) -> usize {
[INFO] [stdout]    |        ^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `length_factor` is never used
[INFO] [stdout]   --> src/mutation.rs:72:4
[INFO] [stdout]    |
[INFO] [stdout] 72 | fn length_factor(g: &Genome) -> f64 {
[INFO] [stdout]    |    ^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `sort_population_by_fitness` is never used
[INFO] [stdout]   --> src/mutation.rs:76:4
[INFO] [stdout]    |
[INFO] [stdout] 76 | fn sort_population_by_fitness(p: &mut Population) {
[INFO] [stdout]    |    ^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 3 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `count_unique_terms` is never used
[INFO] [stdout]   --> src/mutation.rs:28:8
[INFO] [stdout]    |
[INFO] [stdout] 28 | pub fn count_unique_terms(g: &Genome) -> usize {
[INFO] [stdout]    |        ^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `length_factor` is never used
[INFO] [stdout]   --> src/mutation.rs:72:4
[INFO] [stdout]    |
[INFO] [stdout] 72 | fn length_factor(g: &Genome) -> f64 {
[INFO] [stdout]    |    ^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `sort_population_by_fitness` is never used
[INFO] [stdout]   --> src/mutation.rs:76:4
[INFO] [stdout]    |
[INFO] [stdout] 76 | fn sort_population_by_fitness(p: &mut Population) {
[INFO] [stdout]    |    ^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 3 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 4.24s
[INFO] running `Command { std: "docker" "inspect" "e7b71d8435fca13a878030794f3bd2b9f89fb886dd1fe615b6122ae8eafcf024", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "e7b71d8435fca13a878030794f3bd2b9f89fb886dd1fe615b6122ae8eafcf024", kill_on_drop: false }`
[INFO] [stdout] e7b71d8435fca13a878030794f3bd2b9f89fb886dd1fe615b6122ae8eafcf024
[INFO] checking bfollington/note-gene-swapping against try#2d84f2737f3bd9ebfcb07f75aa198d6cf7c715d2 for never-type-fallback-to-never
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fbfollington%2Fnote-gene-swapping" "/workspace/builds/worker-3-tc2/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-3-tc2/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/bfollington/note-gene-swapping 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/bfollington/note-gene-swapping
[INFO] finished tweaking git repo https://github.com/bfollington/note-gene-swapping
[INFO] tweaked toml for git repo https://github.com/bfollington/note-gene-swapping written to /workspace/builds/worker-3-tc2/source/Cargo.toml
[INFO] crate git repo https://github.com/bfollington/note-gene-swapping 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-3-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-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] 9d71f3641d22f7ced556e8dea129af8b6f8f7a38e0201db5ea6d194f5e07b812
[INFO] running `Command { std: "docker" "start" "-a" "9d71f3641d22f7ced556e8dea129af8b6f8f7a38e0201db5ea6d194f5e07b812", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "9d71f3641d22f7ced556e8dea129af8b6f8f7a38e0201db5ea6d194f5e07b812", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "9d71f3641d22f7ced556e8dea129af8b6f8f7a38e0201db5ea6d194f5e07b812", kill_on_drop: false }`
[INFO] [stdout] 9d71f3641d22f7ced556e8dea129af8b6f8f7a38e0201db5ea6d194f5e07b812
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-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] 0ffae9264263ce8f5fa5cc15a6acd8ca2b75446fe7aa05e22ada84326d8e1e2d
[INFO] running `Command { std: "docker" "start" "-a" "0ffae9264263ce8f5fa5cc15a6acd8ca2b75446fe7aa05e22ada84326d8e1e2d", kill_on_drop: false }`
[INFO] [stderr]    Compiling libc v0.2.135
[INFO] [stderr]    Compiling memchr v2.5.0
[INFO] [stderr]     Checking ppv-lite86 v0.2.16
[INFO] [stderr]     Checking regex-syntax v0.6.27
[INFO] [stderr]     Checking aho-corasick v0.7.19
[INFO] [stderr]     Checking getrandom v0.2.8
[INFO] [stderr]     Checking rand_core v0.6.4
[INFO] [stderr]     Checking rand_chacha v0.3.1
[INFO] [stderr]     Checking rand v0.8.5
[INFO] [stderr]     Checking regex v1.6.0
[INFO] [stderr]     Checking note-gene-swapping v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: function `count_unique_terms` is never used
[INFO] [stdout]   --> src/mutation.rs:28:8
[INFO] [stdout]    |
[INFO] [stdout] 28 | pub fn count_unique_terms(g: &Genome) -> usize {
[INFO] [stdout]    |        ^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `length_factor` is never used
[INFO] [stdout]   --> src/mutation.rs:72:4
[INFO] [stdout]    |
[INFO] [stdout] 72 | fn length_factor(g: &Genome) -> f64 {
[INFO] [stdout]    |    ^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `sort_population_by_fitness` is never used
[INFO] [stdout]   --> src/mutation.rs:76:4
[INFO] [stdout]    |
[INFO] [stdout] 76 | fn sort_population_by_fitness(p: &mut Population) {
[INFO] [stdout]    |    ^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `count_unique_terms` is never used
[INFO] [stdout]   --> src/mutation.rs:28:8
[INFO] [stdout]    |
[INFO] [stdout] 28 | pub fn count_unique_terms(g: &Genome) -> usize {
[INFO] [stdout]    |        ^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `length_factor` is never used
[INFO] [stdout]   --> src/mutation.rs:72:4
[INFO] [stdout]    |
[INFO] [stdout] 72 | fn length_factor(g: &Genome) -> f64 {
[INFO] [stdout]    |    ^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `sort_population_by_fitness` is never used
[INFO] [stdout]   --> src/mutation.rs:76:4
[INFO] [stdout]    |
[INFO] [stdout] 76 | fn sort_population_by_fitness(p: &mut Population) {
[INFO] [stdout]    |    ^^^^^^^^^^^^^^^^^^^^^^^^^^
[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` profile [unoptimized + debuginfo] target(s) in 3.97s
[INFO] running `Command { std: "docker" "inspect" "0ffae9264263ce8f5fa5cc15a6acd8ca2b75446fe7aa05e22ada84326d8e1e2d", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "0ffae9264263ce8f5fa5cc15a6acd8ca2b75446fe7aa05e22ada84326d8e1e2d", kill_on_drop: false }`
[INFO] [stdout] 0ffae9264263ce8f5fa5cc15a6acd8ca2b75446fe7aa05e22ada84326d8e1e2d