[INFO] cloning repository https://github.com/drguildo/dailyprogrammer
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/drguildo/dailyprogrammer" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fdrguildo%2Fdailyprogrammer", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fdrguildo%2Fdailyprogrammer'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 6ac12c97b808cff8f6424bd11af4525e5e3dca02
[INFO] testing drguildo/dailyprogrammer against try#8de4c7234dd9b97c9d76b58671343fdbbc9a433e+target=x86_64-unknown-linux-musl for musl_upgrade_1_2_5_with_libc_patch_0
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fdrguildo%2Fdailyprogrammer" "/workspace/builds/worker-3-tc1/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-3-tc1/source'...
[INFO] [stderr] done.
[INFO] started tweaking git repo https://github.com/drguildo/dailyprogrammer
[INFO] finished tweaking git repo https://github.com/drguildo/dailyprogrammer
[INFO] tweaked toml for git repo https://github.com/drguildo/dailyprogrammer written to /workspace/builds/worker-3-tc1/source/Cargo.toml
[INFO] validating manifest of git repo https://github.com/drguildo/dailyprogrammer on toolchain 8de4c7234dd9b97c9d76b58671343fdbbc9a433e
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+8de4c7234dd9b97c9d76b58671343fdbbc9a433e" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate git repo https://github.com/drguildo/dailyprogrammer 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" "+8de4c7234dd9b97c9d76b58671343fdbbc9a433e" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Blocking waiting for file lock on package cache
[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@sha256:90999bfc7ae267e83380e433d8e61a7c072ca6729e92edbae886d3423b3a6f4c" "/opt/rustwide/cargo-home/bin/cargo" "+8de4c7234dd9b97c9d76b58671343fdbbc9a433e" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 837f712fd203f95b6032356e5eba38b2c41d4b2cdf73bda90f5590fe9b3e7b3b
[INFO] running `Command { std: "docker" "start" "-a" "837f712fd203f95b6032356e5eba38b2c41d4b2cdf73bda90f5590fe9b3e7b3b", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "837f712fd203f95b6032356e5eba38b2c41d4b2cdf73bda90f5590fe9b3e7b3b", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "837f712fd203f95b6032356e5eba38b2c41d4b2cdf73bda90f5590fe9b3e7b3b", kill_on_drop: false }`
[INFO] [stdout] 837f712fd203f95b6032356e5eba38b2c41d4b2cdf73bda90f5590fe9b3e7b3b
[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@sha256:90999bfc7ae267e83380e433d8e61a7c072ca6729e92edbae886d3423b3a6f4c" "/opt/rustwide/cargo-home/bin/cargo" "+8de4c7234dd9b97c9d76b58671343fdbbc9a433e" "build" "--frozen" "--message-format=json" "--target" "x86_64-unknown-linux-musl", kill_on_drop: false }`
[INFO] [stdout] daba6c4d8c7d5bfc09baaff43854e8b4f06f9df26ba84e3f078743b5ab8d5f5e
[INFO] running `Command { std: "docker" "start" "-a" "daba6c4d8c7d5bfc09baaff43854e8b4f06f9df26ba84e3f078743b5ab8d5f5e", kill_on_drop: false }`
[INFO] [stderr]    Compiling dailyprogrammer v0.1.0 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 0.06s
[INFO] running `Command { std: "docker" "inspect" "daba6c4d8c7d5bfc09baaff43854e8b4f06f9df26ba84e3f078743b5ab8d5f5e", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "daba6c4d8c7d5bfc09baaff43854e8b4f06f9df26ba84e3f078743b5ab8d5f5e", kill_on_drop: false }`
[INFO] [stdout] daba6c4d8c7d5bfc09baaff43854e8b4f06f9df26ba84e3f078743b5ab8d5f5e
[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@sha256:90999bfc7ae267e83380e433d8e61a7c072ca6729e92edbae886d3423b3a6f4c" "/opt/rustwide/cargo-home/bin/cargo" "+8de4c7234dd9b97c9d76b58671343fdbbc9a433e" "test" "--frozen" "--no-run" "--message-format=json" "--target" "x86_64-unknown-linux-musl", kill_on_drop: false }`
[INFO] [stdout] 112aa83a25dd52fb5e9d93c38ac76d5d033c3066ccbeb24a59d8459b1d63f7fa
[INFO] running `Command { std: "docker" "start" "-a" "112aa83a25dd52fb5e9d93c38ac76d5d033c3066ccbeb24a59d8459b1d63f7fa", kill_on_drop: false }`
[INFO] [stderr]    Compiling dailyprogrammer v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused variable: `word_to_lettersum`
[INFO] [stdout]    --> examples/challenge_399.rs:116:15
[INFO] [stdout]     |
[INFO] [stdout] 116 | fn optional_5(word_to_lettersum: &HashMap<&str, u32>) {
[INFO] [stdout]     |               ^^^^^^^^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_word_to_lettersum`
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `word_to_lettersum`
[INFO] [stdout]    --> examples/challenge_399.rs:125:15
[INFO] [stdout]     |
[INFO] [stdout] 125 | fn optional_6(word_to_lettersum: &HashMap<&str, u32>) {
[INFO] [stdout]     |               ^^^^^^^^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_word_to_lettersum`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `optional_5` is never used
[INFO] [stdout]    --> examples/challenge_399.rs:116:4
[INFO] [stdout]     |
[INFO] [stdout] 116 | fn optional_5(word_to_lettersum: &HashMap<&str, u32>) {
[INFO] [stdout]     |    ^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `optional_6` is never used
[INFO] [stdout]    --> examples/challenge_399.rs:125:4
[INFO] [stdout]     |
[INFO] [stdout] 125 | fn optional_6(word_to_lettersum: &HashMap<&str, u32>) {
[INFO] [stdout]     |    ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `test` profile [unoptimized + debuginfo] target(s) in 1.05s
[INFO] running `Command { std: "docker" "inspect" "112aa83a25dd52fb5e9d93c38ac76d5d033c3066ccbeb24a59d8459b1d63f7fa", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "112aa83a25dd52fb5e9d93c38ac76d5d033c3066ccbeb24a59d8459b1d63f7fa", kill_on_drop: false }`
[INFO] [stdout] 112aa83a25dd52fb5e9d93c38ac76d5d033c3066ccbeb24a59d8459b1d63f7fa
[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@sha256:90999bfc7ae267e83380e433d8e61a7c072ca6729e92edbae886d3423b3a6f4c" "/opt/rustwide/cargo-home/bin/cargo" "+8de4c7234dd9b97c9d76b58671343fdbbc9a433e" "test" "--frozen" "--target" "x86_64-unknown-linux-musl", kill_on_drop: false }`
[INFO] [stdout] 949a21a5b6d3abe385f6e93251cbfb647d52bbe6779a2bf90f6430e4fc94889b
[INFO] running `Command { std: "docker" "start" "-a" "949a21a5b6d3abe385f6e93251cbfb647d52bbe6779a2bf90f6430e4fc94889b", kill_on_drop: false }`
[INFO] [stderr] warning: unused variable: `word_to_lettersum`
[INFO] [stderr]    --> examples/challenge_399.rs:116:15
[INFO] [stderr]     |
[INFO] [stderr] 116 | fn optional_5(word_to_lettersum: &HashMap<&str, u32>) {
[INFO] [stderr]     |               ^^^^^^^^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_word_to_lettersum`
[INFO] [stderr]     |
[INFO] [stderr]     = note: `#[warn(unused_variables)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `word_to_lettersum`
[INFO] [stderr]    --> examples/challenge_399.rs:125:15
[INFO] [stderr]     |
[INFO] [stderr] 125 | fn optional_6(word_to_lettersum: &HashMap<&str, u32>) {
[INFO] [stderr]     |               ^^^^^^^^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_word_to_lettersum`
[INFO] [stderr] 
[INFO] [stderr] warning: function `optional_5` is never used
[INFO] [stderr]    --> examples/challenge_399.rs:116:4
[INFO] [stderr]     |
[INFO] [stderr] 116 | fn optional_5(word_to_lettersum: &HashMap<&str, u32>) {
[INFO] [stderr]     |    ^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: `#[warn(dead_code)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: function `optional_6` is never used
[INFO] [stderr]    --> examples/challenge_399.rs:125:4
[INFO] [stderr]     |
[INFO] [stderr] 125 | fn optional_6(word_to_lettersum: &HashMap<&str, u32>) {
[INFO] [stderr]     |    ^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: `dailyprogrammer` (example "challenge_399") generated 4 warnings
[INFO] [stderr]     Finished `test` profile [unoptimized + debuginfo] target(s) in 0.02s
[INFO] [stderr]      Running unittests src/lib.rs (/opt/rustwide/target/x86_64-unknown-linux-musl/debug/deps/dailyprogrammer-273122e30188ee2a)
[INFO] [stdout] 
[INFO] [stdout] running 1 test
[INFO] [stdout] test tests::test_file_to_matrix ... ok
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 1 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.00s
[INFO] [stdout] 
[INFO] running `Command { std: "docker" "inspect" "949a21a5b6d3abe385f6e93251cbfb647d52bbe6779a2bf90f6430e4fc94889b", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "949a21a5b6d3abe385f6e93251cbfb647d52bbe6779a2bf90f6430e4fc94889b", kill_on_drop: false }`
[INFO] [stdout] 949a21a5b6d3abe385f6e93251cbfb647d52bbe6779a2bf90f6430e4fc94889b