[INFO] updating cached repository https://github.com/babblet/RustyBubbleOS
[INFO] running `"git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "-c" "remote.origin.fetch=refs/heads/*:refs/heads/*" "fetch" "origin" "--force" "--prune"`
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] 2917832ecfa1a0a0d14ad3bb2764dbe02442a043
[INFO] testing babblet/RustyBubbleOS against beta-2020-06-03 for beta-1.45-1
[INFO] running `"git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fbabblet%2FRustyBubbleOS" "/workspace/builds/worker-1/source"`
[INFO] [stderr] Cloning into '/workspace/builds/worker-1/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/babblet/RustyBubbleOS on toolchain beta-2020-06-03
[INFO] running `"/workspace/cargo-home/bin/cargo" "+beta-2020-06-03" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started tweaking git repo https://github.com/babblet/RustyBubbleOS
[INFO] finished tweaking git repo https://github.com/babblet/RustyBubbleOS
[INFO] tweaked toml for git repo https://github.com/babblet/RustyBubbleOS written to /workspace/builds/worker-1/source/Cargo.toml
[INFO] crate git repo https://github.com/babblet/RustyBubbleOS already has a lockfile, it will not be regenerated
[INFO] running `"/workspace/cargo-home/bin/cargo" "+beta-2020-06-03" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] running `"docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1/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" "MAP_USER_ID=0" "-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" "--network" "none" "rustops/crates-build-env" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2020-06-03" "build" "--frozen"`
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] [stdout] 121ae99e75b578faedec7a4e977fa5acb0dd1f1215ebd2b5bd1b273a8f8b08df
[INFO] running `"docker" "start" "-a" "121ae99e75b578faedec7a4e977fa5acb0dd1f1215ebd2b5bd1b273a8f8b08df"`
[INFO] [stderr] sudo: setrlimit(RLIMIT_CORE): Operation not permitted
[INFO] [stderr]    Compiling bootloader v0.8.7
[INFO] [stderr]    Compiling bubble_os v0.1.0 (/opt/rustwide/workdir)
[INFO] [stderr] error: linking with `cc` failed: exit code: 1
[INFO] [stderr]   |
[INFO] [stderr]   = note: "cc" "-Wl,--as-needed" "-Wl,-z,noexecstack" "-m64" "-L" "/opt/rustwide/rustup-home/toolchains/beta-2020-06-03-x86_64-unknown-linux-gnu/lib/rustlib/x86_64-unknown-linux-gnu/lib" "/opt/rustwide/target/debug/deps/bubble_os-82bf53b1eca0c368.bubble_os.9kmwzbh9-cgu.0.rcgu.o" "/opt/rustwide/target/debug/deps/bubble_os-82bf53b1eca0c368.bubble_os.9kmwzbh9-cgu.1.rcgu.o" "/opt/rustwide/target/debug/deps/bubble_os-82bf53b1eca0c368.bubble_os.9kmwzbh9-cgu.2.rcgu.o" "/opt/rustwide/target/debug/deps/bubble_os-82bf53b1eca0c368.bubble_os.9kmwzbh9-cgu.3.rcgu.o" "/opt/rustwide/target/debug/deps/bubble_os-82bf53b1eca0c368.bubble_os.9kmwzbh9-cgu.4.rcgu.o" "/opt/rustwide/target/debug/deps/bubble_os-82bf53b1eca0c368.bubble_os.9kmwzbh9-cgu.5.rcgu.o" "/opt/rustwide/target/debug/deps/bubble_os-82bf53b1eca0c368.bubble_os.9kmwzbh9-cgu.6.rcgu.o" "/opt/rustwide/target/debug/deps/bubble_os-82bf53b1eca0c368.bubble_os.9kmwzbh9-cgu.7.rcgu.o" "-o" "/opt/rustwide/target/debug/deps/bubble_os-82bf53b1eca0c368" "-Wl,--gc-sections" "-pie" "-Wl,-zrelro" "-Wl,-znow" "-nodefaultlibs" "-L" "/opt/rustwide/target/debug/deps" "-L" "/opt/rustwide/rustup-home/toolchains/beta-2020-06-03-x86_64-unknown-linux-gnu/lib/rustlib/x86_64-unknown-linux-gnu/lib" "-Wl,-Bstatic" "/opt/rustwide/rustup-home/toolchains/beta-2020-06-03-x86_64-unknown-linux-gnu/lib/rustlib/x86_64-unknown-linux-gnu/lib/librustc_std_workspace_core-8cdc9d38dd6cd3ce.rlib" "/opt/rustwide/rustup-home/toolchains/beta-2020-06-03-x86_64-unknown-linux-gnu/lib/rustlib/x86_64-unknown-linux-gnu/lib/libcore-336f7d63e72901ef.rlib" "/opt/rustwide/rustup-home/toolchains/beta-2020-06-03-x86_64-unknown-linux-gnu/lib/rustlib/x86_64-unknown-linux-gnu/lib/libcompiler_builtins-57917b1be5233117.rlib" "-Wl,-Bdynamic"
[INFO] [stderr]   = note: /usr/bin/ld: /opt/rustwide/target/debug/deps/bubble_os-82bf53b1eca0c368.bubble_os.9kmwzbh9-cgu.3.rcgu.o: in function `_start':
[INFO] [stderr]           /opt/rustwide/workdir/src/main.rs:14: multiple definition of `_start'; /usr/lib/gcc/x86_64-linux-gnu/9/../../../x86_64-linux-gnu/Scrt1.o:(.text+0x0): first defined here
[INFO] [stderr]           /usr/bin/ld: /usr/lib/gcc/x86_64-linux-gnu/9/../../../x86_64-linux-gnu/Scrt1.o: in function `_start':
[INFO] [stderr]           (.text+0x16): undefined reference to `__libc_csu_fini'
[INFO] [stderr]           /usr/bin/ld: (.text+0x1d): undefined reference to `__libc_csu_init'
[INFO] [stderr]           /usr/bin/ld: (.text+0x24): undefined reference to `main'
[INFO] [stderr]           /usr/bin/ld: (.text+0x2a): undefined reference to `__libc_start_main'
[INFO] [stderr]           collect2: error: ld returned 1 exit status
[INFO] [stderr]           
[INFO] [stderr] 
[INFO] [stderr] error: aborting due to previous error
[INFO] [stderr] 
[INFO] [stderr] error: could not compile `bubble_os`.
[INFO] [stderr] 
[INFO] [stderr] To learn more, run the command again with --verbose.
[INFO] running `"docker" "inspect" "121ae99e75b578faedec7a4e977fa5acb0dd1f1215ebd2b5bd1b273a8f8b08df"`
[INFO] running `"docker" "rm" "-f" "121ae99e75b578faedec7a4e977fa5acb0dd1f1215ebd2b5bd1b273a8f8b08df"`
[INFO] [stdout] 121ae99e75b578faedec7a4e977fa5acb0dd1f1215ebd2b5bd1b273a8f8b08df