[INFO] cloning repository https://github.com/babblet/RustyBubbleOS
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/babblet/RustyBubbleOS" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fbabblet%2FRustyBubbleOS", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fbabblet%2FRustyBubbleOS'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 2917832ecfa1a0a0d14ad3bb2764dbe02442a043
[INFO] testing babblet/RustyBubbleOS against master#99e3aef02079e9c10583638520cd0c134dc3a01d for pr-85530
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fbabblet%2FRustyBubbleOS" "/workspace/builds/worker-3/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-3/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/babblet/RustyBubbleOS on toolchain 99e3aef02079e9c10583638520cd0c134dc3a01d
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+99e3aef02079e9c10583638520cd0c134dc3a01d" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[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-3/source/Cargo.toml
[INFO] crate git repo https://github.com/babblet/RustyBubbleOS already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+99e3aef02079e9c10583638520cd0c134dc3a01d" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3/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@sha256:20528e8c29e4536546f0102ce88568b16ea7538393a33fcca951030f7af10457" "/opt/rustwide/cargo-home/bin/cargo" "+99e3aef02079e9c10583638520cd0c134dc3a01d" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] dc0fda02763d66e93cb837c8a3064ddeaf11562605e6922644c6271e6b435371
[INFO] running `Command { std: "docker" "start" "-a" "dc0fda02763d66e93cb837c8a3064ddeaf11562605e6922644c6271e6b435371", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "dc0fda02763d66e93cb837c8a3064ddeaf11562605e6922644c6271e6b435371", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "dc0fda02763d66e93cb837c8a3064ddeaf11562605e6922644c6271e6b435371", kill_on_drop: false }`
[INFO] [stdout] dc0fda02763d66e93cb837c8a3064ddeaf11562605e6922644c6271e6b435371
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3/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=forbid" "-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@sha256:20528e8c29e4536546f0102ce88568b16ea7538393a33fcca951030f7af10457" "/opt/rustwide/cargo-home/bin/cargo" "+99e3aef02079e9c10583638520cd0c134dc3a01d" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 6d302745ca54c19b8a802eaa551ab3a4b36eaec2399499889eb3a55453279617
[INFO] running `Command { std: "docker" "start" "-a" "6d302745ca54c19b8a802eaa551ab3a4b36eaec2399499889eb3a55453279617", kill_on_drop: false }`
[INFO] [stderr]    Compiling bootloader v0.8.7
[INFO] [stderr]    Compiling bubble_os v0.1.0 (/opt/rustwide/workdir)
[INFO] [stderr] error: could not compile `bubble_os`
[INFO] [stdout] error: linking with `cc` failed: exit status: 1
[INFO] [stdout]   |
[INFO] [stdout]   = note: "cc" "-m64" "-Wl,--eh-frame-hdr" "-Wl,-znoexecstack" "-Wl,--as-needed" "-L" "/opt/rustwide/rustup-home/toolchains/99e3aef02079e9c10583638520cd0c134dc3a01d/lib/rustlib/x86_64-unknown-linux-gnu/lib" "/opt/rustwide/target/debug/deps/bubble_os-baafc3f40aec942c.bubble_os.aogi1xwc-cgu.0.rcgu.o" "/opt/rustwide/target/debug/deps/bubble_os-baafc3f40aec942c.bubble_os.aogi1xwc-cgu.1.rcgu.o" "/opt/rustwide/target/debug/deps/bubble_os-baafc3f40aec942c.bubble_os.aogi1xwc-cgu.2.rcgu.o" "/opt/rustwide/target/debug/deps/bubble_os-baafc3f40aec942c.bubble_os.aogi1xwc-cgu.3.rcgu.o" "/opt/rustwide/target/debug/deps/bubble_os-baafc3f40aec942c.bubble_os.aogi1xwc-cgu.4.rcgu.o" "/opt/rustwide/target/debug/deps/bubble_os-baafc3f40aec942c.bubble_os.aogi1xwc-cgu.5.rcgu.o" "/opt/rustwide/target/debug/deps/bubble_os-baafc3f40aec942c.bubble_os.aogi1xwc-cgu.6.rcgu.o" "/opt/rustwide/target/debug/deps/bubble_os-baafc3f40aec942c.bubble_os.aogi1xwc-cgu.7.rcgu.o" "-o" "/opt/rustwide/target/debug/deps/bubble_os-baafc3f40aec942c" "-Wl,--gc-sections" "-pie" "-Wl,-zrelro" "-Wl,-znow" "-nodefaultlibs" "-L" "/opt/rustwide/target/debug/deps" "-L" "/opt/rustwide/rustup-home/toolchains/99e3aef02079e9c10583638520cd0c134dc3a01d/lib/rustlib/x86_64-unknown-linux-gnu/lib" "-Wl,-Bstatic" "/opt/rustwide/rustup-home/toolchains/99e3aef02079e9c10583638520cd0c134dc3a01d/lib/rustlib/x86_64-unknown-linux-gnu/lib/librustc_std_workspace_core-a1fd7734706d5518.rlib" "/opt/rustwide/rustup-home/toolchains/99e3aef02079e9c10583638520cd0c134dc3a01d/lib/rustlib/x86_64-unknown-linux-gnu/lib/libcore-c8ded1707ad10767.rlib" "/opt/rustwide/rustup-home/toolchains/99e3aef02079e9c10583638520cd0c134dc3a01d/lib/rustlib/x86_64-unknown-linux-gnu/lib/libcompiler_builtins-1eec8756baa5bc24.rlib" "-Wl,-Bdynamic"
[INFO] [stdout]   = note: /usr/bin/ld: /opt/rustwide/target/debug/deps/bubble_os-baafc3f40aec942c.bubble_os.aogi1xwc-cgu.1.rcgu.o: in function `_start':
[INFO] [stdout]           /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] [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] [stderr] 
[INFO] [stdout] error: aborting due to previous error
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr] To learn more, run the command again with --verbose.
[INFO] running `Command { std: "docker" "inspect" "6d302745ca54c19b8a802eaa551ab3a4b36eaec2399499889eb3a55453279617", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "6d302745ca54c19b8a802eaa551ab3a4b36eaec2399499889eb3a55453279617", kill_on_drop: false }`
[INFO] [stdout] 6d302745ca54c19b8a802eaa551ab3a4b36eaec2399499889eb3a55453279617