[INFO] cloning repository https://github.com/MatheusAThomaz/mem-os
[INFO] running `"git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/MatheusAThomaz/mem-os" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FMatheusAThomaz%2Fmem-os"`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FMatheusAThomaz%2Fmem-os'...
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] 98e50d1ad2646bc55ed12b781054586e6e6e8d66
[INFO] testing MatheusAThomaz/mem-os against 1.44.0 for beta-1.45-1
[INFO] running `"git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FMatheusAThomaz%2Fmem-os" "/workspace/builds/worker-5/source"`
[INFO] [stderr] Cloning into '/workspace/builds/worker-5/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/MatheusAThomaz/mem-os on toolchain 1.44.0
[INFO] running `"/workspace/cargo-home/bin/cargo" "+1.44.0" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started tweaking git repo https://github.com/MatheusAThomaz/mem-os
[INFO] finished tweaking git repo https://github.com/MatheusAThomaz/mem-os
[INFO] tweaked toml for git repo https://github.com/MatheusAThomaz/mem-os written to /workspace/builds/worker-5/source/Cargo.toml
[INFO] crate git repo https://github.com/MatheusAThomaz/mem-os already has a lockfile, it will not be regenerated
[INFO] running `"/workspace/cargo-home/bin/cargo" "+1.44.0" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] running `"docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-5/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5/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" "+1.44.0" "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] 5f9d5d74c26b73f73588f0ee50f4dbe7c099f25adfa6824e977547a25250d91e
[INFO] running `"docker" "start" "-a" "5f9d5d74c26b73f73588f0ee50f4dbe7c099f25adfa6824e977547a25250d91e"`
[INFO] [stderr] sudo: setrlimit(RLIMIT_CORE): Operation not permitted
[INFO] [stderr]    Compiling blog_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/1.44.0-x86_64-unknown-linux-gnu/lib/rustlib/x86_64-unknown-linux-gnu/lib" "/opt/rustwide/target/debug/deps/blog_os-b9d9d2e5d31ae5fa.blog_os.ccpnlzod-cgu.0.rcgu.o" "-o" "/opt/rustwide/target/debug/deps/blog_os-b9d9d2e5d31ae5fa" "-Wl,--gc-sections" "-pie" "-Wl,-zrelro" "-Wl,-znow" "-nodefaultlibs" "-L" "/opt/rustwide/target/debug/deps" "-L" "/opt/rustwide/rustup-home/toolchains/1.44.0-x86_64-unknown-linux-gnu/lib/rustlib/x86_64-unknown-linux-gnu/lib" "-Wl,-Bstatic" "/opt/rustwide/rustup-home/toolchains/1.44.0-x86_64-unknown-linux-gnu/lib/rustlib/x86_64-unknown-linux-gnu/lib/librustc_std_workspace_core-57654524b3e40c00.rlib" "/opt/rustwide/rustup-home/toolchains/1.44.0-x86_64-unknown-linux-gnu/lib/rustlib/x86_64-unknown-linux-gnu/lib/libcore-72180f1527a726a2.rlib" "/opt/rustwide/rustup-home/toolchains/1.44.0-x86_64-unknown-linux-gnu/lib/rustlib/x86_64-unknown-linux-gnu/lib/libcompiler_builtins-990cc8f4a91a3ab4.rlib" "-Wl,-Bdynamic"
[INFO] [stderr]   = note: /usr/bin/ld: /opt/rustwide/target/debug/deps/blog_os-b9d9d2e5d31ae5fa.blog_os.ccpnlzod-cgu.0.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 `blog_os`.
[INFO] [stderr] 
[INFO] [stderr] To learn more, run the command again with --verbose.
[INFO] running `"docker" "inspect" "5f9d5d74c26b73f73588f0ee50f4dbe7c099f25adfa6824e977547a25250d91e"`
[INFO] running `"docker" "rm" "-f" "5f9d5d74c26b73f73588f0ee50f4dbe7c099f25adfa6824e977547a25250d91e"`
[INFO] [stdout] 5f9d5d74c26b73f73588f0ee50f4dbe7c099f25adfa6824e977547a25250d91e