[INFO] cloning repository https://github.com/otrho/regalloc-poc
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/otrho/regalloc-poc" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fotrho%2Fregalloc-poc", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fotrho%2Fregalloc-poc'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] d51145843bbaab1f99c22108c9f1b2919cc44975
[INFO] testing otrho/regalloc-poc 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%2Fotrho%2Fregalloc-poc" "/workspace/builds/worker-6-tc1/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-6-tc1/source'...
[INFO] [stderr] done.
[INFO] started tweaking git repo https://github.com/otrho/regalloc-poc
[INFO] finished tweaking git repo https://github.com/otrho/regalloc-poc
[INFO] tweaked toml for git repo https://github.com/otrho/regalloc-poc written to /workspace/builds/worker-6-tc1/source/Cargo.toml
[INFO] validating manifest of git repo https://github.com/otrho/regalloc-poc 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/otrho/regalloc-poc 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-6-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-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] 322c28be8604969526fdf0d69bac763de3d4ec740abc3db28eac2964f442b9a3
[INFO] running `Command { std: "docker" "start" "-a" "322c28be8604969526fdf0d69bac763de3d4ec740abc3db28eac2964f442b9a3", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "322c28be8604969526fdf0d69bac763de3d4ec740abc3db28eac2964f442b9a3", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "322c28be8604969526fdf0d69bac763de3d4ec740abc3db28eac2964f442b9a3", kill_on_drop: false }`
[INFO] [stdout] 322c28be8604969526fdf0d69bac763de3d4ec740abc3db28eac2964f442b9a3
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-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] 426c191b52e9b8cfd86e1f1a716b942ed95c0fa6bef3e3163cd3d26cc6676ce8
[INFO] running `Command { std: "docker" "start" "-a" "426c191b52e9b8cfd86e1f1a716b942ed95c0fa6bef3e3163cd3d26cc6676ce8", kill_on_drop: false }`
[INFO] [stderr]    Compiling libc v0.2.140
[INFO] [stderr]    Compiling ppv-lite86 v0.2.17
[INFO] [stderr]    Compiling slice-group-by v0.3.0
[INFO] [stderr]    Compiling smallvec v1.10.0
[INFO] [stderr]    Compiling regalloc2 v0.6.1
[INFO] [stderr]    Compiling getrandom v0.2.8
[INFO] [stderr]    Compiling rand_core v0.6.4
[INFO] [stderr]    Compiling rand_chacha v0.3.1
[INFO] [stderr]    Compiling rand v0.8.5
[INFO] [stderr]    Compiling experimenting-with-a-lisp-to-evaluate-cranelift-register-allocator v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: field `0` is never read
[INFO] [stdout]    --> src/main.rs:157:14
[INFO] [stdout]     |
[INFO] [stdout] 157 |     Argument(BlockIdx),
[INFO] [stdout]     |     -------- ^^^^^^^^
[INFO] [stdout]     |     |
[INFO] [stdout]     |     field in this variant
[INFO] [stdout]     |
[INFO] [stdout]     = note: `Value` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stdout]     = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] help: consider changing the field to be of unit type to suppress this warning while preserving the field numbering, or remove the field
[INFO] [stdout]     |
[INFO] [stdout] 157 -     Argument(BlockIdx),
[INFO] [stdout] 157 +     Argument(()),
[INFO] [stdout]     |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: lifetime flowing from input to output with different syntax can be confusing
[INFO] [stdout]    --> src/main.rs:783:18
[INFO] [stdout]     |
[INFO] [stdout] 783 |     fn new(asm: &'a mut Asm) -> AsmRegAllocator {
[INFO] [stdout]     |                  ^^             --------------- the lifetime gets resolved as `'a`
[INFO] [stdout]     |                  |
[INFO] [stdout]     |                  this lifetime flows to the output
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(mismatched_lifetime_syntaxes)]` on by default
[INFO] [stdout] help: one option is to consistently use `'a`
[INFO] [stdout]     |
[INFO] [stdout] 783 |     fn new(asm: &'a mut Asm) -> AsmRegAllocator<'a> {
[INFO] [stdout]     |                                                ++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 6.42s
[INFO] running `Command { std: "docker" "inspect" "426c191b52e9b8cfd86e1f1a716b942ed95c0fa6bef3e3163cd3d26cc6676ce8", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "426c191b52e9b8cfd86e1f1a716b942ed95c0fa6bef3e3163cd3d26cc6676ce8", kill_on_drop: false }`
[INFO] [stdout] 426c191b52e9b8cfd86e1f1a716b942ed95c0fa6bef3e3163cd3d26cc6676ce8
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-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] 392fa1fc114af59d12f3ec79c0df4a8de69f42878b5b95cd68e4b9b2999c6835
[INFO] running `Command { std: "docker" "start" "-a" "392fa1fc114af59d12f3ec79c0df4a8de69f42878b5b95cd68e4b9b2999c6835", kill_on_drop: false }`
[INFO] [stderr]    Compiling experimenting-with-a-lisp-to-evaluate-cranelift-register-allocator v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: field `0` is never read
[INFO] [stdout]    --> src/main.rs:157:14
[INFO] [stdout]     |
[INFO] [stdout] 157 |     Argument(BlockIdx),
[INFO] [stdout]     |     -------- ^^^^^^^^
[INFO] [stdout]     |     |
[INFO] [stdout]     |     field in this variant
[INFO] [stdout]     |
[INFO] [stdout]     = note: `Value` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stdout]     = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] help: consider changing the field to be of unit type to suppress this warning while preserving the field numbering, or remove the field
[INFO] [stdout]     |
[INFO] [stdout] 157 -     Argument(BlockIdx),
[INFO] [stdout] 157 +     Argument(()),
[INFO] [stdout]     |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: lifetime flowing from input to output with different syntax can be confusing
[INFO] [stdout]    --> src/main.rs:783:18
[INFO] [stdout]     |
[INFO] [stdout] 783 |     fn new(asm: &'a mut Asm) -> AsmRegAllocator {
[INFO] [stdout]     |                  ^^             --------------- the lifetime gets resolved as `'a`
[INFO] [stdout]     |                  |
[INFO] [stdout]     |                  this lifetime flows to the output
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(mismatched_lifetime_syntaxes)]` on by default
[INFO] [stdout] help: one option is to consistently use `'a`
[INFO] [stdout]     |
[INFO] [stdout] 783 |     fn new(asm: &'a mut Asm) -> AsmRegAllocator<'a> {
[INFO] [stdout]     |                                                ++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `test` profile [unoptimized + debuginfo] target(s) in 0.75s
[INFO] running `Command { std: "docker" "inspect" "392fa1fc114af59d12f3ec79c0df4a8de69f42878b5b95cd68e4b9b2999c6835", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "392fa1fc114af59d12f3ec79c0df4a8de69f42878b5b95cd68e4b9b2999c6835", kill_on_drop: false }`
[INFO] [stdout] 392fa1fc114af59d12f3ec79c0df4a8de69f42878b5b95cd68e4b9b2999c6835
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-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] 4e0b3d92998b5ea068168a62f720288110ca20d5903dabc13d0dfc68ba071635
[INFO] running `Command { std: "docker" "start" "-a" "4e0b3d92998b5ea068168a62f720288110ca20d5903dabc13d0dfc68ba071635", kill_on_drop: false }`
[INFO] [stderr] warning: field `0` is never read
[INFO] [stderr]    --> src/main.rs:157:14
[INFO] [stderr]     |
[INFO] [stderr] 157 |     Argument(BlockIdx),
[INFO] [stderr]     |     -------- ^^^^^^^^
[INFO] [stderr]     |     |
[INFO] [stderr]     |     field in this variant
[INFO] [stderr]     |
[INFO] [stderr]     = note: `Value` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stderr]     = note: `#[warn(dead_code)]` on by default
[INFO] [stderr] help: consider changing the field to be of unit type to suppress this warning while preserving the field numbering, or remove the field
[INFO] [stderr]     |
[INFO] [stderr] 157 -     Argument(BlockIdx),
[INFO] [stderr] 157 +     Argument(()),
[INFO] [stderr]     |
[INFO] [stderr] 
[INFO] [stderr] warning: lifetime flowing from input to output with different syntax can be confusing
[INFO] [stderr]    --> src/main.rs:783:18
[INFO] [stderr]     |
[INFO] [stderr] 783 |     fn new(asm: &'a mut Asm) -> AsmRegAllocator {
[INFO] [stderr]     |                  ^^             --------------- the lifetime gets resolved as `'a`
[INFO] [stderr]     |                  |
[INFO] [stderr]     |                  this lifetime flows to the output
[INFO] [stderr]     |
[INFO] [stderr]     = note: `#[warn(mismatched_lifetime_syntaxes)]` on by default
[INFO] [stderr] help: one option is to consistently use `'a`
[INFO] [stderr]     |
[INFO] [stderr] 783 |     fn new(asm: &'a mut Asm) -> AsmRegAllocator<'a> {
[INFO] [stderr]     |                                                ++++
[INFO] [stderr] 
[INFO] [stderr] warning: `experimenting-with-a-lisp-to-evaluate-cranelift-register-allocator` (bin "experimenting-with-a-lisp-to-evaluate-cranelift-register-allocator" test) generated 2 warnings (run `cargo fix --bin "experimenting-with-a-lisp-to-evaluate-cranelift-register-allocator" --tests` to apply 1 suggestion)
[INFO] [stderr]     Finished `test` profile [unoptimized + debuginfo] target(s) in 0.05s
[INFO] [stderr]      Running unittests src/main.rs (/opt/rustwide/target/x86_64-unknown-linux-musl/debug/deps/experimenting_with_a_lisp_to_evaluate_cranelift_register_allocator-b4400ae223c43de6)
[INFO] [stdout] 
[INFO] [stdout] running 0 tests
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 0 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.00s
[INFO] [stdout] 
[INFO] running `Command { std: "docker" "inspect" "4e0b3d92998b5ea068168a62f720288110ca20d5903dabc13d0dfc68ba071635", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "4e0b3d92998b5ea068168a62f720288110ca20d5903dabc13d0dfc68ba071635", kill_on_drop: false }`
[INFO] [stdout] 4e0b3d92998b5ea068168a62f720288110ca20d5903dabc13d0dfc68ba071635