[INFO] cloning repository https://github.com/tnas/word-ladder
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/tnas/word-ladder" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Ftnas%2Fword-ladder", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Ftnas%2Fword-ladder'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 18eca310fbea5db95951ff4dd398d86ed7564995
[INFO] testing tnas/word-ladder against 1.64.0 for beta-1.65-1
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Ftnas%2Fword-ladder" "/workspace/builds/worker-2/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-2/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/tnas/word-ladder on toolchain 1.64.0
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.64.0" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/tnas/word-ladder
[INFO] finished tweaking git repo https://github.com/tnas/word-ladder
[INFO] tweaked toml for git repo https://github.com/tnas/word-ladder written to /workspace/builds/worker-2/source/Cargo.toml
[INFO] crate git repo https://github.com/tnas/word-ladder already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.64.0" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2/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@sha256:3d1cd00eb6e6ea2a7969240779edeaeff35b24be85036c63b883ba933028a15f" "/opt/rustwide/cargo-home/bin/cargo" "+1.64.0" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 22a39dda45696c1a19bf65f50020e79b8eda5857b71fb2fa566a33245a660bc1
[INFO] running `Command { std: "docker" "start" "-a" "22a39dda45696c1a19bf65f50020e79b8eda5857b71fb2fa566a33245a660bc1", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "22a39dda45696c1a19bf65f50020e79b8eda5857b71fb2fa566a33245a660bc1", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "22a39dda45696c1a19bf65f50020e79b8eda5857b71fb2fa566a33245a660bc1", kill_on_drop: false }`
[INFO] [stdout] 22a39dda45696c1a19bf65f50020e79b8eda5857b71fb2fa566a33245a660bc1
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2/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=warn" "-e" "RUSTDOCFLAGS=--cap-lints=warn" "-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@sha256:3d1cd00eb6e6ea2a7969240779edeaeff35b24be85036c63b883ba933028a15f" "/opt/rustwide/cargo-home/bin/cargo" "+1.64.0" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] ca70884ab618206e2c01dd49892b24489a1b692b34421399700dbcd0f12fd758
[INFO] running `Command { std: "docker" "start" "-a" "ca70884ab618206e2c01dd49892b24489a1b692b34421399700dbcd0f12fd758", kill_on_drop: false }`
[INFO] [stderr]    Compiling autocfg v1.0.1
[INFO] [stderr]    Compiling const_fn v0.4.2
[INFO] [stderr]    Compiling lazy_static v1.4.0
[INFO] [stderr]    Compiling cfg-if v1.0.0
[INFO] [stderr]    Compiling crossbeam-utils v0.8.0
[INFO] [stderr]    Compiling word-ladder v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] error: linking with `cc` failed: exit status: 1
[INFO] [stdout]   |
[INFO] [stdout]   = note: "cc" "-m64" "/tmp/rustcUOfnkA/symbols.o" "/opt/rustwide/target/debug/deps/word_ladder-674f5775e88ba5e3.word_ladder.a7d02c7f-cgu.0.rcgu.o" "/opt/rustwide/target/debug/deps/word_ladder-674f5775e88ba5e3.word_ladder.a7d02c7f-cgu.1.rcgu.o" "/opt/rustwide/target/debug/deps/word_ladder-674f5775e88ba5e3.word_ladder.a7d02c7f-cgu.10.rcgu.o" "/opt/rustwide/target/debug/deps/word_ladder-674f5775e88ba5e3.word_ladder.a7d02c7f-cgu.11.rcgu.o" "/opt/rustwide/target/debug/deps/word_ladder-674f5775e88ba5e3.word_ladder.a7d02c7f-cgu.12.rcgu.o" "/opt/rustwide/target/debug/deps/word_ladder-674f5775e88ba5e3.word_ladder.a7d02c7f-cgu.13.rcgu.o" "/opt/rustwide/target/debug/deps/word_ladder-674f5775e88ba5e3.word_ladder.a7d02c7f-cgu.14.rcgu.o" "/opt/rustwide/target/debug/deps/word_ladder-674f5775e88ba5e3.word_ladder.a7d02c7f-cgu.15.rcgu.o" "/opt/rustwide/target/debug/deps/word_ladder-674f5775e88ba5e3.word_ladder.a7d02c7f-cgu.2.rcgu.o" "/opt/rustwide/target/debug/deps/word_ladder-674f5775e88ba5e3.word_ladder.a7d02c7f-cgu.3.rcgu.o" "/opt/rustwide/target/debug/deps/word_ladder-674f5775e88ba5e3.word_ladder.a7d02c7f-cgu.4.rcgu.o" "/opt/rustwide/target/debug/deps/word_ladder-674f5775e88ba5e3.word_ladder.a7d02c7f-cgu.5.rcgu.o" "/opt/rustwide/target/debug/deps/word_ladder-674f5775e88ba5e3.word_ladder.a7d02c7f-cgu.6.rcgu.o" "/opt/rustwide/target/debug/deps/word_ladder-674f5775e88ba5e3.word_ladder.a7d02c7f-cgu.7.rcgu.o" "/opt/rustwide/target/debug/deps/word_ladder-674f5775e88ba5e3.word_ladder.a7d02c7f-cgu.8.rcgu.o" "/opt/rustwide/target/debug/deps/word_ladder-674f5775e88ba5e3.word_ladder.a7d02c7f-cgu.9.rcgu.o" "/opt/rustwide/target/debug/deps/word_ladder-674f5775e88ba5e3.1iyjxbn1jwx7bsw8.rcgu.o" "-Wl,--as-needed" "-L" "/opt/rustwide/target/debug/deps" "-L" "/opt/rustwide/rustup-home/toolchains/1.64.0-x86_64-unknown-linux-gnu/lib/rustlib/x86_64-unknown-linux-gnu/lib" "-Wl,-Bstatic" "/opt/rustwide/target/debug/deps/libcrossbeam_utils-e021582c677e3b09.rlib" "/opt/rustwide/target/debug/deps/liblazy_static-3a8cd441589d8bb8.rlib" "/opt/rustwide/target/debug/deps/libcfg_if-fa0d38a03582caa4.rlib" "-Wl,--start-group" "/opt/rustwide/rustup-home/toolchains/1.64.0-x86_64-unknown-linux-gnu/lib/rustlib/x86_64-unknown-linux-gnu/lib/libstd-5670385a2fe8b60b.rlib" "/opt/rustwide/rustup-home/toolchains/1.64.0-x86_64-unknown-linux-gnu/lib/rustlib/x86_64-unknown-linux-gnu/lib/libpanic_unwind-fd56ba6dbf7aaecc.rlib" "/opt/rustwide/rustup-home/toolchains/1.64.0-x86_64-unknown-linux-gnu/lib/rustlib/x86_64-unknown-linux-gnu/lib/libobject-b8acf8e5c2e85baa.rlib" "/opt/rustwide/rustup-home/toolchains/1.64.0-x86_64-unknown-linux-gnu/lib/rustlib/x86_64-unknown-linux-gnu/lib/libmemchr-1706edefffdca0a2.rlib" "/opt/rustwide/rustup-home/toolchains/1.64.0-x86_64-unknown-linux-gnu/lib/rustlib/x86_64-unknown-linux-gnu/lib/libaddr2line-f483302e0b13708e.rlib" "/opt/rustwide/rustup-home/toolchains/1.64.0-x86_64-unknown-linux-gnu/lib/rustlib/x86_64-unknown-linux-gnu/lib/libgimli-725b0718fc18e1ed.rlib" "/opt/rustwide/rustup-home/toolchains/1.64.0-x86_64-unknown-linux-gnu/lib/rustlib/x86_64-unknown-linux-gnu/lib/librustc_demangle-de685fcf2157e6fb.rlib" "/opt/rustwide/rustup-home/toolchains/1.64.0-x86_64-unknown-linux-gnu/lib/rustlib/x86_64-unknown-linux-gnu/lib/libstd_detect-f613ac3eda05b9ff.rlib" "/opt/rustwide/rustup-home/toolchains/1.64.0-x86_64-unknown-linux-gnu/lib/rustlib/x86_64-unknown-linux-gnu/lib/libhashbrown-3de98a7d049af6a1.rlib" "/opt/rustwide/rustup-home/toolchains/1.64.0-x86_64-unknown-linux-gnu/lib/rustlib/x86_64-unknown-linux-gnu/lib/libminiz_oxide-c12183655bdce152.rlib" "/opt/rustwide/rustup-home/toolchains/1.64.0-x86_64-unknown-linux-gnu/lib/rustlib/x86_64-unknown-linux-gnu/lib/libadler-0fc7beea925de7e3.rlib" "/opt/rustwide/rustup-home/toolchains/1.64.0-x86_64-unknown-linux-gnu/lib/rustlib/x86_64-unknown-linux-gnu/lib/librustc_std_workspace_alloc-8c34825485bf59dc.rlib" "/opt/rustwide/rustup-home/toolchains/1.64.0-x86_64-unknown-linux-gnu/lib/rustlib/x86_64-unknown-linux-gnu/lib/libunwind-ba5f7e926e729d81.rlib" "/opt/rustwide/rustup-home/toolchains/1.64.0-x86_64-unknown-linux-gnu/lib/rustlib/x86_64-unknown-linux-gnu/lib/libcfg_if-643de0950163a839.rlib" "/opt/rustwide/rustup-home/toolchains/1.64.0-x86_64-unknown-linux-gnu/lib/rustlib/x86_64-unknown-linux-gnu/lib/liblibc-539ea2f72ef89687.rlib" "/opt/rustwide/rustup-home/toolchains/1.64.0-x86_64-unknown-linux-gnu/lib/rustlib/x86_64-unknown-linux-gnu/lib/liballoc-871432094bb4c885.rlib" "/opt/rustwide/rustup-home/toolchains/1.64.0-x86_64-unknown-linux-gnu/lib/rustlib/x86_64-unknown-linux-gnu/lib/librustc_std_workspace_core-ef1a8ee61f2e39bf.rlib" "/opt/rustwide/rustup-home/toolchains/1.64.0-x86_64-unknown-linux-gnu/lib/rustlib/x86_64-unknown-linux-gnu/lib/libcore-f1646747442c1c7b.rlib" "-Wl,--end-group" "/opt/rustwide/rustup-home/toolchains/1.64.0-x86_64-unknown-linux-gnu/lib/rustlib/x86_64-unknown-linux-gnu/lib/libcompiler_builtins-ff283b4bf550fa1c.rlib" "-Wl,-Bdynamic" "-lgcc_s" "-lutil" "-lrt" "-lpthread" "-lm" "-ldl" "-lc" "-Wl,--eh-frame-hdr" "-Wl,-znoexecstack" "-L" "/opt/rustwide/rustup-home/toolchains/1.64.0-x86_64-unknown-linux-gnu/lib/rustlib/x86_64-unknown-linux-gnu/lib" "-o" "/opt/rustwide/target/debug/deps/word_ladder-674f5775e88ba5e3" "-Wl,--gc-sections" "-pie" "-Wl,-zrelro,-znow" "-nodefaultlibs"
[INFO] [stdout]   = note: collect2: error: ld returned 1 exit status
[INFO] [stdout]           
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to previous error
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `word-ladder` due to 2 previous errors
[INFO] running `Command { std: "docker" "inspect" "ca70884ab618206e2c01dd49892b24489a1b692b34421399700dbcd0f12fd758", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "ca70884ab618206e2c01dd49892b24489a1b692b34421399700dbcd0f12fd758", kill_on_drop: false }`
[INFO] [stdout] ca70884ab618206e2c01dd49892b24489a1b692b34421399700dbcd0f12fd758