[INFO] cloning repository https://github.com/tibetsou/collatz
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/tibetsou/collatz" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Ftibetsou%2Fcollatz", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Ftibetsou%2Fcollatz'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 15cd702f9690f24224399f67468131511653f0b4
[INFO] testing tibetsou/collatz against try#fc4ba03ef77ca5018fb78a097d3b924d30f15bfc+target=i686-unknown-linux-musl for musl_upgrade_1_2_take4
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Ftibetsou%2Fcollatz" "/workspace/builds/worker-3/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-3/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/tibetsou/collatz on toolchain fc4ba03ef77ca5018fb78a097d3b924d30f15bfc
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+fc4ba03ef77ca5018fb78a097d3b924d30f15bfc" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/tibetsou/collatz
[INFO] finished tweaking git repo https://github.com/tibetsou/collatz
[INFO] tweaked toml for git repo https://github.com/tibetsou/collatz written to /workspace/builds/worker-3/source/Cargo.toml
[INFO] crate git repo https://github.com/tibetsou/collatz already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+fc4ba03ef77ca5018fb78a097d3b924d30f15bfc" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3/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:bb5b0feb4f87116a4ea905b7ff5bf5b85913db05e9f0fbc1abdd3168928d9075" "/opt/rustwide/cargo-home/bin/cargo" "+fc4ba03ef77ca5018fb78a097d3b924d30f15bfc" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 59f6b69b6b7d07a6e9a7e3ab4025068721174bb2e43cb2c6e39bafb21f6c1091
[INFO] running `Command { std: "docker" "start" "-a" "59f6b69b6b7d07a6e9a7e3ab4025068721174bb2e43cb2c6e39bafb21f6c1091", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "59f6b69b6b7d07a6e9a7e3ab4025068721174bb2e43cb2c6e39bafb21f6c1091", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "59f6b69b6b7d07a6e9a7e3ab4025068721174bb2e43cb2c6e39bafb21f6c1091", kill_on_drop: false }`
[INFO] [stdout] 59f6b69b6b7d07a6e9a7e3ab4025068721174bb2e43cb2c6e39bafb21f6c1091
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3/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:bb5b0feb4f87116a4ea905b7ff5bf5b85913db05e9f0fbc1abdd3168928d9075" "/opt/rustwide/cargo-home/bin/cargo" "+fc4ba03ef77ca5018fb78a097d3b924d30f15bfc" "build" "--frozen" "--message-format=json" "--target" "i686-unknown-linux-musl", kill_on_drop: false }`
[INFO] [stdout] dc14b86523a21a500860ae7cecd04242f343327064333c9907ef8cfc9f68b8a3
[INFO] running `Command { std: "docker" "start" "-a" "dc14b86523a21a500860ae7cecd04242f343327064333c9907ef8cfc9f68b8a3", kill_on_drop: false }`
[INFO] [stderr]    Compiling collatz v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: function `f` is never used
[INFO] [stdout]   --> src/main.rs:21:4
[INFO] [stdout]    |
[INFO] [stdout] 21 | fn f(n: u64) -> u64 {
[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 [unoptimized + debuginfo] target(s) in 0.16s
[INFO] running `Command { std: "docker" "inspect" "dc14b86523a21a500860ae7cecd04242f343327064333c9907ef8cfc9f68b8a3", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "dc14b86523a21a500860ae7cecd04242f343327064333c9907ef8cfc9f68b8a3", kill_on_drop: false }`
[INFO] [stdout] dc14b86523a21a500860ae7cecd04242f343327064333c9907ef8cfc9f68b8a3
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3/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:bb5b0feb4f87116a4ea905b7ff5bf5b85913db05e9f0fbc1abdd3168928d9075" "/opt/rustwide/cargo-home/bin/cargo" "+fc4ba03ef77ca5018fb78a097d3b924d30f15bfc" "test" "--frozen" "--no-run" "--message-format=json" "--target" "i686-unknown-linux-musl", kill_on_drop: false }`
[INFO] [stdout] 66526e3b55847ca8c5f56a1bd91c922d72c55f017433e116d71fb697abeb638c
[INFO] running `Command { std: "docker" "start" "-a" "66526e3b55847ca8c5f56a1bd91c922d72c55f017433e116d71fb697abeb638c", kill_on_drop: false }`
[INFO] [stderr]    Compiling collatz v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: function `f` is never used
[INFO] [stdout]   --> src/main.rs:21:4
[INFO] [stdout]    |
[INFO] [stdout] 21 | fn f(n: u64) -> u64 {
[INFO] [stdout]    |    ^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: linking with `cc` failed: exit status: 1
[INFO] [stdout]   |
[INFO] [stdout]   = note: "cc" "-m32" "-Wl,-melf_i386" "/opt/rustwide/rustup-home/toolchains/fc4ba03ef77ca5018fb78a097d3b924d30f15bfc/lib/rustlib/i686-unknown-linux-musl/lib/self-contained/crt1.o" "/opt/rustwide/rustup-home/toolchains/fc4ba03ef77ca5018fb78a097d3b924d30f15bfc/lib/rustlib/i686-unknown-linux-musl/lib/self-contained/crti.o" "/opt/rustwide/rustup-home/toolchains/fc4ba03ef77ca5018fb78a097d3b924d30f15bfc/lib/rustlib/i686-unknown-linux-musl/lib/self-contained/crtbegin.o" "/tmp/rustcQxD21R/symbols.o" "/opt/rustwide/target/i686-unknown-linux-musl/debug/deps/collatz-f5fef17c299bbc3b.collatz.3c554a6e-cgu.0.rcgu.o" "/opt/rustwide/target/i686-unknown-linux-musl/debug/deps/collatz-f5fef17c299bbc3b.collatz.3c554a6e-cgu.1.rcgu.o" "/opt/rustwide/target/i686-unknown-linux-musl/debug/deps/collatz-f5fef17c299bbc3b.collatz.3c554a6e-cgu.2.rcgu.o" "/opt/rustwide/target/i686-unknown-linux-musl/debug/deps/collatz-f5fef17c299bbc3b.collatz.3c554a6e-cgu.3.rcgu.o" "/opt/rustwide/target/i686-unknown-linux-musl/debug/deps/collatz-f5fef17c299bbc3b.collatz.3c554a6e-cgu.4.rcgu.o" "/opt/rustwide/target/i686-unknown-linux-musl/debug/deps/collatz-f5fef17c299bbc3b.41qryzy3wm201i66.rcgu.o" "-Wl,--as-needed" "-L" "/opt/rustwide/target/i686-unknown-linux-musl/debug/deps" "-L" "/opt/rustwide/target/debug/deps" "-L" "/opt/rustwide/rustup-home/toolchains/fc4ba03ef77ca5018fb78a097d3b924d30f15bfc/lib/rustlib/i686-unknown-linux-musl/lib" "-Wl,-Bstatic" "/opt/rustwide/rustup-home/toolchains/fc4ba03ef77ca5018fb78a097d3b924d30f15bfc/lib/rustlib/i686-unknown-linux-musl/lib/libtest-65f18907fd6ec13b.rlib" "/opt/rustwide/rustup-home/toolchains/fc4ba03ef77ca5018fb78a097d3b924d30f15bfc/lib/rustlib/i686-unknown-linux-musl/lib/libgetopts-a33d703c18d9ee3f.rlib" "/opt/rustwide/rustup-home/toolchains/fc4ba03ef77ca5018fb78a097d3b924d30f15bfc/lib/rustlib/i686-unknown-linux-musl/lib/libunicode_width-811cb533d1b7b40c.rlib" "/opt/rustwide/rustup-home/toolchains/fc4ba03ef77ca5018fb78a097d3b924d30f15bfc/lib/rustlib/i686-unknown-linux-musl/lib/librustc_std_workspace_std-cc9f2e0faaa3ebff.rlib" "/opt/rustwide/rustup-home/toolchains/fc4ba03ef77ca5018fb78a097d3b924d30f15bfc/lib/rustlib/i686-unknown-linux-musl/lib/libstd-38415af07202eec9.rlib" "/opt/rustwide/rustup-home/toolchains/fc4ba03ef77ca5018fb78a097d3b924d30f15bfc/lib/rustlib/i686-unknown-linux-musl/lib/libpanic_unwind-59041d4614967ad3.rlib" "/opt/rustwide/rustup-home/toolchains/fc4ba03ef77ca5018fb78a097d3b924d30f15bfc/lib/rustlib/i686-unknown-linux-musl/lib/libobject-f65a09c55a7a90fc.rlib" "/opt/rustwide/rustup-home/toolchains/fc4ba03ef77ca5018fb78a097d3b924d30f15bfc/lib/rustlib/i686-unknown-linux-musl/lib/libmemchr-bec851b1c7f938e5.rlib" "/opt/rustwide/rustup-home/toolchains/fc4ba03ef77ca5018fb78a097d3b924d30f15bfc/lib/rustlib/i686-unknown-linux-musl/lib/libaddr2line-480dffb0155ffc54.rlib" "/opt/rustwide/rustup-home/toolchains/fc4ba03ef77ca5018fb78a097d3b924d30f15bfc/lib/rustlib/i686-unknown-linux-musl/lib/libgimli-3e0609024918215d.rlib" "/opt/rustwide/rustup-home/toolchains/fc4ba03ef77ca5018fb78a097d3b924d30f15bfc/lib/rustlib/i686-unknown-linux-musl/lib/librustc_demangle-57f849a406d5741e.rlib" "/opt/rustwide/rustup-home/toolchains/fc4ba03ef77ca5018fb78a097d3b924d30f15bfc/lib/rustlib/i686-unknown-linux-musl/lib/libstd_detect-45f2c9a42d38c063.rlib" "/opt/rustwide/rustup-home/toolchains/fc4ba03ef77ca5018fb78a097d3b924d30f15bfc/lib/rustlib/i686-unknown-linux-musl/lib/libhashbrown-9daff9fabf1f47d4.rlib" "/opt/rustwide/rustup-home/toolchains/fc4ba03ef77ca5018fb78a097d3b924d30f15bfc/lib/rustlib/i686-unknown-linux-musl/lib/libminiz_oxide-0b6ae00cb2a9d13c.rlib" "/opt/rustwide/rustup-home/toolchains/fc4ba03ef77ca5018fb78a097d3b924d30f15bfc/lib/rustlib/i686-unknown-linux-musl/lib/libadler-f6e81c474a4c8737.rlib" "/opt/rustwide/rustup-home/toolchains/fc4ba03ef77ca5018fb78a097d3b924d30f15bfc/lib/rustlib/i686-unknown-linux-musl/lib/librustc_std_workspace_alloc-7142bed6e8c61df7.rlib" "/opt/rustwide/rustup-home/toolchains/fc4ba03ef77ca5018fb78a097d3b924d30f15bfc/lib/rustlib/i686-unknown-linux-musl/lib/libunwind-05e5d2116d8ccaed.rlib" "-lunwind" "/opt/rustwide/rustup-home/toolchains/fc4ba03ef77ca5018fb78a097d3b924d30f15bfc/lib/rustlib/i686-unknown-linux-musl/lib/libcfg_if-d5e1e356a795cdbe.rlib" "/opt/rustwide/rustup-home/toolchains/fc4ba03ef77ca5018fb78a097d3b924d30f15bfc/lib/rustlib/i686-unknown-linux-musl/lib/liblibc-0e6d2d8133f34135.rlib" "-lc" "/opt/rustwide/rustup-home/toolchains/fc4ba03ef77ca5018fb78a097d3b924d30f15bfc/lib/rustlib/i686-unknown-linux-musl/lib/liballoc-56bb435a2a7e81be.rlib" "/opt/rustwide/rustup-home/toolchains/fc4ba03ef77ca5018fb78a097d3b924d30f15bfc/lib/rustlib/i686-unknown-linux-musl/lib/librustc_std_workspace_core-6ca2f4ada9976318.rlib" "/opt/rustwide/rustup-home/toolchains/fc4ba03ef77ca5018fb78a097d3b924d30f15bfc/lib/rustlib/i686-unknown-linux-musl/lib/libcore-4e89f6dae500b25b.rlib" "/opt/rustwide/rustup-home/toolchains/fc4ba03ef77ca5018fb78a097d3b924d30f15bfc/lib/rustlib/i686-unknown-linux-musl/lib/libcompiler_builtins-08f6948d0b6c7f83.rlib" "-Wl,-Bdynamic" "-Wl,--eh-frame-hdr" "-Wl,-znoexecstack" "-nostartfiles" "-L" "/opt/rustwide/rustup-home/toolchains/fc4ba03ef77ca5018fb78a097d3b924d30f15bfc/lib/rustlib/i686-unknown-linux-musl/lib" "-L" "/opt/rustwide/rustup-home/toolchains/fc4ba03ef77ca5018fb78a097d3b924d30f15bfc/lib/rustlib/i686-unknown-linux-musl/lib/self-contained" "-o" "/opt/rustwide/target/i686-unknown-linux-musl/debug/deps/collatz-f5fef17c299bbc3b" "-Wl,--gc-sections" "-static" "-no-pie" "-Wl,-zrelro,-znow" "-nodefaultlibs" "/opt/rustwide/rustup-home/toolchains/fc4ba03ef77ca5018fb78a097d3b924d30f15bfc/lib/rustlib/i686-unknown-linux-musl/lib/self-contained/crtend.o" "/opt/rustwide/rustup-home/toolchains/fc4ba03ef77ca5018fb78a097d3b924d30f15bfc/lib/rustlib/i686-unknown-linux-musl/lib/self-contained/crtn.o"
[INFO] [stdout]   = note: collect2: error: ld returned 1 exit status
[INFO] [stdout]           
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to previous error; 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `collatz` due to 2 previous errors; 1 warning emitted
[INFO] running `Command { std: "docker" "inspect" "66526e3b55847ca8c5f56a1bd91c922d72c55f017433e116d71fb697abeb638c", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "66526e3b55847ca8c5f56a1bd91c922d72c55f017433e116d71fb697abeb638c", kill_on_drop: false }`
[INFO] [stdout] 66526e3b55847ca8c5f56a1bd91c922d72c55f017433e116d71fb697abeb638c