[INFO] updating cached repository https://github.com/mrsweaters/nutbutter-os
[INFO] running `Command { std: "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", kill_on_drop: false }`
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] d78c1c4a1180610af9ca2ec10d9a8d300caa792a
[INFO] testing mrsweaters/nutbutter-os against try#03a1ea71b075ab964b5278bc6e74cd6c52c36ee0 for pr-74409
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fmrsweaters%2Fnutbutter-os" "/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/mrsweaters/nutbutter-os on toolchain 03a1ea71b075ab964b5278bc6e74cd6c52c36ee0
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+03a1ea71b075ab964b5278bc6e74cd6c52c36ee0" "read-manifest" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/mrsweaters/nutbutter-os
[INFO] finished tweaking git repo https://github.com/mrsweaters/nutbutter-os
[INFO] tweaked toml for git repo https://github.com/mrsweaters/nutbutter-os written to /workspace/builds/worker-2/source/Cargo.toml
[INFO] crate git repo https://github.com/mrsweaters/nutbutter-os already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+03a1ea71b075ab964b5278bc6e74cd6c52c36ee0" "fetch" "--locked" "--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" "MAP_USER_ID=0" "-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" "--network" "none" "rustops/crates-build-env@sha256:a636fd89d022f18117e1dc8fb37a0a009933cdbbe082814857f0e2024962d47c" "/opt/rustwide/cargo-home/bin/cargo" "+03a1ea71b075ab964b5278bc6e74cd6c52c36ee0" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 99536a21f725e54eb2ac356378ca97586703bad7e4390de7980aa7d98bfd360b
[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" "99536a21f725e54eb2ac356378ca97586703bad7e4390de7980aa7d98bfd360b", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "99536a21f725e54eb2ac356378ca97586703bad7e4390de7980aa7d98bfd360b", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "99536a21f725e54eb2ac356378ca97586703bad7e4390de7980aa7d98bfd360b", kill_on_drop: false }`
[INFO] [stdout] 99536a21f725e54eb2ac356378ca97586703bad7e4390de7980aa7d98bfd360b
[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" "MAP_USER_ID=0" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=forbid" "-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@sha256:a636fd89d022f18117e1dc8fb37a0a009933cdbbe082814857f0e2024962d47c" "/opt/rustwide/cargo-home/bin/cargo" "+03a1ea71b075ab964b5278bc6e74cd6c52c36ee0" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] bc6890ebd682b288d05948279b7ba74ee68398f87ec5c9b2b6ac44256cec8273
[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" "bc6890ebd682b288d05948279b7ba74ee68398f87ec5c9b2b6ac44256cec8273", kill_on_drop: false }`
[INFO] [stderr]    Compiling spin v0.4.9
[INFO] [stderr]    Compiling os_bootinfo v0.2.1
[INFO] [stderr]    Compiling volatile v0.2.4
[INFO] [stderr]    Compiling lazy_static v1.1.0
[INFO] [stderr]    Compiling bootloader_precompiled v0.2.0
[INFO] [stderr]    Compiling nb_os v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: `...` range patterns are deprecated
[INFO] [stdout]   --> src/vga_buffer.rs:82:21
[INFO] [stdout]    |
[INFO] [stdout] 82 |                 0x20...0x7e | b'\n' => self.write_byte(byte),
[INFO] [stdout]    |                     ^^^ help: use `..=` for an inclusive range
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(ellipsis_inclusive_range_patterns)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[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/03a1ea71b075ab964b5278bc6e74cd6c52c36ee0/lib/rustlib/x86_64-unknown-linux-gnu/lib" "/opt/rustwide/target/debug/deps/nb_os-64fb80ccf779d5ce.nb_os.ccimighc-cgu.0.rcgu.o" "/opt/rustwide/target/debug/deps/nb_os-64fb80ccf779d5ce.nb_os.ccimighc-cgu.1.rcgu.o" "/opt/rustwide/target/debug/deps/nb_os-64fb80ccf779d5ce.nb_os.ccimighc-cgu.10.rcgu.o" "/opt/rustwide/target/debug/deps/nb_os-64fb80ccf779d5ce.nb_os.ccimighc-cgu.11.rcgu.o" "/opt/rustwide/target/debug/deps/nb_os-64fb80ccf779d5ce.nb_os.ccimighc-cgu.12.rcgu.o" "/opt/rustwide/target/debug/deps/nb_os-64fb80ccf779d5ce.nb_os.ccimighc-cgu.13.rcgu.o" "/opt/rustwide/target/debug/deps/nb_os-64fb80ccf779d5ce.nb_os.ccimighc-cgu.14.rcgu.o" "/opt/rustwide/target/debug/deps/nb_os-64fb80ccf779d5ce.nb_os.ccimighc-cgu.15.rcgu.o" "/opt/rustwide/target/debug/deps/nb_os-64fb80ccf779d5ce.nb_os.ccimighc-cgu.2.rcgu.o" "/opt/rustwide/target/debug/deps/nb_os-64fb80ccf779d5ce.nb_os.ccimighc-cgu.3.rcgu.o" "/opt/rustwide/target/debug/deps/nb_os-64fb80ccf779d5ce.nb_os.ccimighc-cgu.4.rcgu.o" "/opt/rustwide/target/debug/deps/nb_os-64fb80ccf779d5ce.nb_os.ccimighc-cgu.5.rcgu.o" "/opt/rustwide/target/debug/deps/nb_os-64fb80ccf779d5ce.nb_os.ccimighc-cgu.6.rcgu.o" "/opt/rustwide/target/debug/deps/nb_os-64fb80ccf779d5ce.nb_os.ccimighc-cgu.7.rcgu.o" "/opt/rustwide/target/debug/deps/nb_os-64fb80ccf779d5ce.nb_os.ccimighc-cgu.8.rcgu.o" "/opt/rustwide/target/debug/deps/nb_os-64fb80ccf779d5ce.nb_os.ccimighc-cgu.9.rcgu.o" "-o" "/opt/rustwide/target/debug/deps/nb_os-64fb80ccf779d5ce" "-Wl,--gc-sections" "-pie" "-Wl,-zrelro" "-Wl,-znow" "-nodefaultlibs" "-L" "/opt/rustwide/target/debug/deps" "-L" "/opt/rustwide/rustup-home/toolchains/03a1ea71b075ab964b5278bc6e74cd6c52c36ee0/lib/rustlib/x86_64-unknown-linux-gnu/lib" "-Wl,-Bstatic" "/opt/rustwide/target/debug/deps/libvolatile-32940d97e1f2d256.rlib" "/opt/rustwide/target/debug/deps/libbootloader_precompiled-fe9c3001cb7698ef.rlib" "/opt/rustwide/target/debug/deps/libos_bootinfo-3eabcdf807c97e6a.rlib" "/opt/rustwide/target/debug/deps/liblazy_static-88d867820d45cdf2.rlib" "/opt/rustwide/target/debug/deps/libspin-1099d1050c17fdb8.rlib" "/opt/rustwide/rustup-home/toolchains/03a1ea71b075ab964b5278bc6e74cd6c52c36ee0/lib/rustlib/x86_64-unknown-linux-gnu/lib/librustc_std_workspace_core-68f423c59dc48a40.rlib" "/opt/rustwide/rustup-home/toolchains/03a1ea71b075ab964b5278bc6e74cd6c52c36ee0/lib/rustlib/x86_64-unknown-linux-gnu/lib/libcore-54580c7798bf2225.rlib" "/opt/rustwide/rustup-home/toolchains/03a1ea71b075ab964b5278bc6e74cd6c52c36ee0/lib/rustlib/x86_64-unknown-linux-gnu/lib/libcompiler_builtins-95a4d456339b7385.rlib" "-Wl,-Bdynamic"
[INFO] [stdout]   = note: /usr/bin/ld: /opt/rustwide/target/debug/deps/nb_os-64fb80ccf779d5ce.nb_os.ccimighc-cgu.5.rcgu.o: in function `_start':
[INFO] [stdout]           /opt/rustwide/workdir/src/main.rs:23: multiple definition of `_start'; /usr/lib/gcc/x86_64-linux-gnu/9/../../../x86_64-linux-gnu/Scrt1.o:(.text+0x0): first defined here
[INFO] [stdout]           /usr/bin/ld: /usr/lib/gcc/x86_64-linux-gnu/9/../../../x86_64-linux-gnu/Scrt1.o: in function `_start':
[INFO] [stdout]           (.text+0x16): undefined reference to `__libc_csu_fini'
[INFO] [stdout]           /usr/bin/ld: (.text+0x1d): undefined reference to `__libc_csu_init'
[INFO] [stdout]           /usr/bin/ld: (.text+0x24): undefined reference to `main'
[INFO] [stdout]           /usr/bin/ld: (.text+0x2a): undefined reference to `__libc_start_main'
[INFO] [stdout]           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 `nb_os`.
[INFO] [stderr] 
[INFO] [stderr] To learn more, run the command again with --verbose.
[INFO] running `Command { std: "docker" "inspect" "bc6890ebd682b288d05948279b7ba74ee68398f87ec5c9b2b6ac44256cec8273", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "bc6890ebd682b288d05948279b7ba74ee68398f87ec5c9b2b6ac44256cec8273", kill_on_drop: false }`
[INFO] [stdout] bc6890ebd682b288d05948279b7ba74ee68398f87ec5c9b2b6ac44256cec8273