[INFO] cloning repository https://github.com/cdown/mack
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/cdown/mack" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fcdown%2Fmack", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fcdown%2Fmack'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] ccbedbe899730519f73aa42acc8f792515df6cfa
[INFO] testing cdown/mack against 1.49.0 for beta-1.50-1
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fcdown%2Fmack" "/workspace/builds/worker-9/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-9/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/cdown/mack on toolchain 1.49.0
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.49.0" "read-manifest" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/cdown/mack
[INFO] finished tweaking git repo https://github.com/cdown/mack
[INFO] tweaked toml for git repo https://github.com/cdown/mack written to /workspace/builds/worker-9/source/Cargo.toml
[INFO] crate git repo https://github.com/cdown/mack already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.49.0" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-9/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-9/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" "rustops/crates-build-env@sha256:c8ac004eab7d63a0ad09a2dde3d3353ba464f767bee4de425dc8f74c46a1905e" "/opt/rustwide/cargo-home/bin/cargo" "+1.49.0" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] [stdout] 8f83f11b692637f4173011b42fc9beccc764a55b812e66781c7b16d84d151cc7
[INFO] running `Command { std: "docker" "start" "-a" "8f83f11b692637f4173011b42fc9beccc764a55b812e66781c7b16d84d151cc7", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "8f83f11b692637f4173011b42fc9beccc764a55b812e66781c7b16d84d151cc7", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "8f83f11b692637f4173011b42fc9beccc764a55b812e66781c7b16d84d151cc7", kill_on_drop: false }`
[INFO] [stdout] 8f83f11b692637f4173011b42fc9beccc764a55b812e66781c7b16d84d151cc7
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-9/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-9/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" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--user" "0:0" "--network" "none" "rustops/crates-build-env@sha256:c8ac004eab7d63a0ad09a2dde3d3353ba464f767bee4de425dc8f74c46a1905e" "/opt/rustwide/cargo-home/bin/cargo" "+1.49.0" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 932e7db44a97a968e701ba7a587b29c212585d14041d6bd4d29ced69e577095d
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] running `Command { std: "docker" "start" "-a" "932e7db44a97a968e701ba7a587b29c212585d14041d6bd4d29ced69e577095d", kill_on_drop: false }`
[INFO] [stderr]    Compiling libc v0.2.70
[INFO] [stderr]    Compiling memchr v2.3.3
[INFO] [stderr]    Compiling taglib-sys v1.0.0
[INFO] [stderr]    Compiling unicode-width v0.1.7
[INFO] [stderr]    Compiling regex-syntax v0.6.17
[INFO] [stderr]    Compiling same-file v1.0.6
[INFO] [stderr]    Compiling thread_local v1.0.1
[INFO] [stderr]    Compiling walkdir v2.3.1
[INFO] [stderr]    Compiling textwrap v0.11.0
[INFO] [stderr]    Compiling aho-corasick v0.7.10
[INFO] [stderr]    Compiling atty v0.2.14
[INFO] [stderr]    Compiling clap v2.33.1
[INFO] [stderr]    Compiling taglib v1.0.0
[INFO] [stderr]    Compiling regex v1.3.7
[INFO] [stderr]    Compiling mack v1.0.0 (/opt/rustwide/workdir)
[INFO] [stdout] error: linking with `cc` failed: exit code: 1
[INFO] [stdout]   |
[INFO] [stdout]   = note: "cc" "-Wl,--as-needed" "-Wl,-z,noexecstack" "-m64" "-Wl,--eh-frame-hdr" "-L" "/opt/rustwide/rustup-home/toolchains/1.49.0-x86_64-unknown-linux-gnu/lib/rustlib/x86_64-unknown-linux-gnu/lib" "/opt/rustwide/target/debug/deps/mack-2826bc684f720675.mack.8i3qwyb5-cgu.0.rcgu.o" "/opt/rustwide/target/debug/deps/mack-2826bc684f720675.mack.8i3qwyb5-cgu.1.rcgu.o" "/opt/rustwide/target/debug/deps/mack-2826bc684f720675.mack.8i3qwyb5-cgu.10.rcgu.o" "/opt/rustwide/target/debug/deps/mack-2826bc684f720675.mack.8i3qwyb5-cgu.11.rcgu.o" "/opt/rustwide/target/debug/deps/mack-2826bc684f720675.mack.8i3qwyb5-cgu.12.rcgu.o" "/opt/rustwide/target/debug/deps/mack-2826bc684f720675.mack.8i3qwyb5-cgu.13.rcgu.o" "/opt/rustwide/target/debug/deps/mack-2826bc684f720675.mack.8i3qwyb5-cgu.14.rcgu.o" "/opt/rustwide/target/debug/deps/mack-2826bc684f720675.mack.8i3qwyb5-cgu.15.rcgu.o" "/opt/rustwide/target/debug/deps/mack-2826bc684f720675.mack.8i3qwyb5-cgu.2.rcgu.o" "/opt/rustwide/target/debug/deps/mack-2826bc684f720675.mack.8i3qwyb5-cgu.3.rcgu.o" "/opt/rustwide/target/debug/deps/mack-2826bc684f720675.mack.8i3qwyb5-cgu.4.rcgu.o" "/opt/rustwide/target/debug/deps/mack-2826bc684f720675.mack.8i3qwyb5-cgu.5.rcgu.o" "/opt/rustwide/target/debug/deps/mack-2826bc684f720675.mack.8i3qwyb5-cgu.6.rcgu.o" "/opt/rustwide/target/debug/deps/mack-2826bc684f720675.mack.8i3qwyb5-cgu.7.rcgu.o" "/opt/rustwide/target/debug/deps/mack-2826bc684f720675.mack.8i3qwyb5-cgu.8.rcgu.o" "/opt/rustwide/target/debug/deps/mack-2826bc684f720675.mack.8i3qwyb5-cgu.9.rcgu.o" "-o" "/opt/rustwide/target/debug/deps/mack-2826bc684f720675" "/opt/rustwide/target/debug/deps/mack-2826bc684f720675.3i8tzurk0al2xwuy.rcgu.o" "-Wl,--gc-sections" "-pie" "-Wl,-zrelro" "-Wl,-znow" "-nodefaultlibs" "-L" "/opt/rustwide/target/debug/deps" "-L" "/opt/rustwide/rustup-home/toolchains/1.49.0-x86_64-unknown-linux-gnu/lib/rustlib/x86_64-unknown-linux-gnu/lib" "-Wl,-Bstatic" "/opt/rustwide/target/debug/deps/libtaglib-204370386a3eb055.rlib" "/opt/rustwide/target/debug/deps/libtaglib_sys-74a7f0d58a965fe9.rlib" "/opt/rustwide/target/debug/deps/libregex-6f8416c1b62a7ea4.rlib" "/opt/rustwide/target/debug/deps/libthread_local-76e36b18ae5ab5a5.rlib" "/opt/rustwide/target/debug/deps/libregex_syntax-8ee41e3acf264971.rlib" "/opt/rustwide/target/debug/deps/libaho_corasick-60e11e3c8decf3d4.rlib" "/opt/rustwide/target/debug/deps/libmemchr-68751ffea57ec29e.rlib" "/opt/rustwide/target/debug/deps/liblazy_static-7895c92c6d278491.rlib" "/opt/rustwide/target/debug/deps/libwalkdir-c239aebdeb046bad.rlib" "/opt/rustwide/target/debug/deps/libsame_file-af3c3c7843ff20ed.rlib" "/opt/rustwide/target/debug/deps/libclap-799474bf9bab98ab.rlib" "/opt/rustwide/target/debug/deps/libvec_map-97b2d50686bf36e9.rlib" "/opt/rustwide/target/debug/deps/libtextwrap-9c8afc33c4d7176e.rlib" "/opt/rustwide/target/debug/deps/libunicode_width-382bc28e71ec1b15.rlib" "/opt/rustwide/target/debug/deps/libstrsim-8b805b0832095d99.rlib" "/opt/rustwide/target/debug/deps/libbitflags-de31228f2c0549ed.rlib" "/opt/rustwide/target/debug/deps/libatty-fa9b65a732e41f63.rlib" "/opt/rustwide/target/debug/deps/liblibc-5f544ee7a72d514c.rlib" "/opt/rustwide/target/debug/deps/libansi_term-017778a055950e81.rlib" "-Wl,--start-group" "/opt/rustwide/rustup-home/toolchains/1.49.0-x86_64-unknown-linux-gnu/lib/rustlib/x86_64-unknown-linux-gnu/lib/libstd-e12de7683a34c500.rlib" "/opt/rustwide/rustup-home/toolchains/1.49.0-x86_64-unknown-linux-gnu/lib/rustlib/x86_64-unknown-linux-gnu/lib/libpanic_unwind-446a53c2e468675f.rlib" "/opt/rustwide/rustup-home/toolchains/1.49.0-x86_64-unknown-linux-gnu/lib/rustlib/x86_64-unknown-linux-gnu/lib/libminiz_oxide-86fef9fb252a2d33.rlib" "/opt/rustwide/rustup-home/toolchains/1.49.0-x86_64-unknown-linux-gnu/lib/rustlib/x86_64-unknown-linux-gnu/lib/libadler-3bed9bfd30304751.rlib" "/opt/rustwide/rustup-home/toolchains/1.49.0-x86_64-unknown-linux-gnu/lib/rustlib/x86_64-unknown-linux-gnu/lib/libobject-0e38eeb474a7b386.rlib" "/opt/rustwide/rustup-home/toolchains/1.49.0-x86_64-unknown-linux-gnu/lib/rustlib/x86_64-unknown-linux-gnu/lib/libaddr2line-a846ed547b824740.rlib" "/opt/rustwide/rustup-home/toolchains/1.49.0-x86_64-unknown-linux-gnu/lib/rustlib/x86_64-unknown-linux-gnu/lib/libgimli-c9540f0a4fb9265d.rlib" "/opt/rustwide/rustup-home/toolchains/1.49.0-x86_64-unknown-linux-gnu/lib/rustlib/x86_64-unknown-linux-gnu/lib/librustc_demangle-7d2ca66c92c356eb.rlib" "/opt/rustwide/rustup-home/toolchains/1.49.0-x86_64-unknown-linux-gnu/lib/rustlib/x86_64-unknown-linux-gnu/lib/libhashbrown-147e2c808f949493.rlib" "/opt/rustwide/rustup-home/toolchains/1.49.0-x86_64-unknown-linux-gnu/lib/rustlib/x86_64-unknown-linux-gnu/lib/librustc_std_workspace_alloc-bd2a4369506670e9.rlib" "/opt/rustwide/rustup-home/toolchains/1.49.0-x86_64-unknown-linux-gnu/lib/rustlib/x86_64-unknown-linux-gnu/lib/libunwind-74bfdd0ce7d0ed48.rlib" "/opt/rustwide/rustup-home/toolchains/1.49.0-x86_64-unknown-linux-gnu/lib/rustlib/x86_64-unknown-linux-gnu/lib/libcfg_if-6777f47f1c491841.rlib" "/opt/rustwide/rustup-home/toolchains/1.49.0-x86_64-unknown-linux-gnu/lib/rustlib/x86_64-unknown-linux-gnu/lib/liblibc-b104f1790174f2be.rlib" "/opt/rustwide/rustup-home/toolchains/1.49.0-x86_64-unknown-linux-gnu/lib/rustlib/x86_64-unknown-linux-gnu/lib/liballoc-db37898996f45c13.rlib" "/opt/rustwide/rustup-home/toolchains/1.49.0-x86_64-unknown-linux-gnu/lib/rustlib/x86_64-unknown-linux-gnu/lib/librustc_std_workspace_core-25b7435131fc4938.rlib" "/opt/rustwide/rustup-home/toolchains/1.49.0-x86_64-unknown-linux-gnu/lib/rustlib/x86_64-unknown-linux-gnu/lib/libcore-9d4b6f3c097e876e.rlib" "-Wl,--end-group" "/opt/rustwide/rustup-home/toolchains/1.49.0-x86_64-unknown-linux-gnu/lib/rustlib/x86_64-unknown-linux-gnu/lib/libcompiler_builtins-3f953ad652ab829a.rlib" "-Wl,-Bdynamic" "-ltag_c" "-ltag" "-lutil" "-ldl" "-lutil" "-lgcc_s" "-lutil" "-lrt" "-lpthread" "-lm" "-ldl" "-lc"
[INFO] [stdout]   = note: /usr/bin/ld: cannot find -ltag_c
[INFO] [stdout]           /usr/bin/ld: cannot find -ltag
[INFO] [stdout]           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 `mack`
[INFO] [stderr] 
[INFO] [stderr] To learn more, run the command again with --verbose.
[INFO] running `Command { std: "docker" "inspect" "932e7db44a97a968e701ba7a587b29c212585d14041d6bd4d29ced69e577095d", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "932e7db44a97a968e701ba7a587b29c212585d14041d6bd4d29ced69e577095d", kill_on_drop: false }`
[INFO] [stdout] 932e7db44a97a968e701ba7a587b29c212585d14041d6bd4d29ced69e577095d