[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_getrandom_patch_0
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fdrguildo%2Fdailyprogrammer" "/workspace/builds/worker-7-tc1/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-7-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-7-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] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-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] 08c197e76530ce1c0fd9eae96cf77bcf0cbc5d63a7d0b328ebcea0f90348f0a3
[INFO] running `Command { std: "docker" "start" "-a" "08c197e76530ce1c0fd9eae96cf77bcf0cbc5d63a7d0b328ebcea0f90348f0a3", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "08c197e76530ce1c0fd9eae96cf77bcf0cbc5d63a7d0b328ebcea0f90348f0a3", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "08c197e76530ce1c0fd9eae96cf77bcf0cbc5d63a7d0b328ebcea0f90348f0a3", kill_on_drop: false }`
[INFO] [stdout] 08c197e76530ce1c0fd9eae96cf77bcf0cbc5d63a7d0b328ebcea0f90348f0a3
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-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] ccab44330dbf32d51aefbf5b0c7c268e6d9b931fff05de1d6869572bc9ac972c
[INFO] running `Command { std: "docker" "start" "-a" "ccab44330dbf32d51aefbf5b0c7c268e6d9b931fff05de1d6869572bc9ac972c", kill_on_drop: false }`
[INFO] [stderr]    Compiling dailyprogrammer v0.1.0 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 0.11s
[INFO] running `Command { std: "docker" "inspect" "ccab44330dbf32d51aefbf5b0c7c268e6d9b931fff05de1d6869572bc9ac972c", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "ccab44330dbf32d51aefbf5b0c7c268e6d9b931fff05de1d6869572bc9ac972c", kill_on_drop: false }`
[INFO] [stdout] ccab44330dbf32d51aefbf5b0c7c268e6d9b931fff05de1d6869572bc9ac972c
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-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] 3b1ce16f36a9b1626685b4baae49f455cf2b08c386253a9c37b10e7de7bf58f6
[INFO] running `Command { std: "docker" "start" "-a" "3b1ce16f36a9b1626685b4baae49f455cf2b08c386253a9c37b10e7de7bf58f6", 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 1.18s
[INFO] running `Command { std: "docker" "inspect" "3b1ce16f36a9b1626685b4baae49f455cf2b08c386253a9c37b10e7de7bf58f6", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "3b1ce16f36a9b1626685b4baae49f455cf2b08c386253a9c37b10e7de7bf58f6", kill_on_drop: false }`
[INFO] [stdout] 3b1ce16f36a9b1626685b4baae49f455cf2b08c386253a9c37b10e7de7bf58f6
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-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] edd881a69823d3989e2f1938d6e7f42f5d2f1d81cc004ae16933f41bbd00e93d
[INFO] running `Command { std: "docker" "start" "-a" "edd881a69823d3989e2f1938d6e7f42f5d2f1d81cc004ae16933f41bbd00e93d", 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 0.04s
[INFO] [stdout] 
[INFO] [stderr]      Running unittests src/lib.rs (/opt/rustwide/target/x86_64-unknown-linux-musl/debug/deps/dailyprogrammer-273122e30188ee2a)
[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" "edd881a69823d3989e2f1938d6e7f42f5d2f1d81cc004ae16933f41bbd00e93d", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "edd881a69823d3989e2f1938d6e7f42f5d2f1d81cc004ae16933f41bbd00e93d", kill_on_drop: false }`
[INFO] [stdout] edd881a69823d3989e2f1938d6e7f42f5d2f1d81cc004ae16933f41bbd00e93d