[INFO] cloning repository https://github.com/imtsuki/xv7
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/imtsuki/xv7" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fimtsuki%2Fxv7", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fimtsuki%2Fxv7'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] fcc602179520f87c3a380fafa4033b2059a3b44c
[INFO] checking imtsuki/xv7 against try#45d8b6e68beee1c9c1ce92ae258a7e02f8f13aa4 for pr-83744
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fimtsuki%2Fxv7" "/workspace/builds/worker-1/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-1/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/imtsuki/xv7 on toolchain 45d8b6e68beee1c9c1ce92ae258a7e02f8f13aa4
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+45d8b6e68beee1c9c1ce92ae258a7e02f8f13aa4" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] removed /workspace/builds/worker-1/source/rust-toolchain
[INFO] started tweaking git repo https://github.com/imtsuki/xv7
[INFO] finished tweaking git repo https://github.com/imtsuki/xv7
[INFO] tweaked toml for git repo https://github.com/imtsuki/xv7 written to /workspace/builds/worker-1/source/Cargo.toml
[INFO] crate git repo https://github.com/imtsuki/xv7 already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+45d8b6e68beee1c9c1ce92ae258a7e02f8f13aa4" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded raw-cpuid v9.0.0
[INFO] [stderr]   Downloaded tock-registers v0.5.0
[INFO] [stderr]   Downloaded ucs2 v0.3.1
[INFO] [stderr]   Downloaded volatile v0.4.4
[INFO] [stderr]   Downloaded x86_64 v0.14.0
[INFO] [stderr]   Downloaded cortex-a v2.9.0
[INFO] [stderr]   Downloaded vte v0.7.1
[INFO] [stderr]   Downloaded uefi-macros v0.3.3
[INFO] [stderr]   Downloaded embedded-graphics v0.6.2
[INFO] [stderr]   Downloaded register v0.5.1
[INFO] [stderr]   Downloaded bit_field v0.10.0
[INFO] [stderr]   Downloaded goblin v0.4.0
[INFO] [stderr]   Downloaded linked_list_allocator v0.8.11
[INFO] [stderr]   Downloaded uefi v0.8.0
[INFO] [stderr]   Downloaded uefi-services v0.5.0
[INFO] [stderr]   Downloaded spin v0.9.0
[INFO] running `Command { std: "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" "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" "+45d8b6e68beee1c9c1ce92ae258a7e02f8f13aa4" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 002041a87500cac39eb240e65c439cc4f983fe7eb14a26712ad4eaed615ee59e
[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" "002041a87500cac39eb240e65c439cc4f983fe7eb14a26712ad4eaed615ee59e", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "002041a87500cac39eb240e65c439cc4f983fe7eb14a26712ad4eaed615ee59e", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "002041a87500cac39eb240e65c439cc4f983fe7eb14a26712ad4eaed615ee59e", kill_on_drop: false }`
[INFO] [stdout] 002041a87500cac39eb240e65c439cc4f983fe7eb14a26712ad4eaed615ee59e
[INFO] running `Command { std: "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" "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" "+45d8b6e68beee1c9c1ce92ae258a7e02f8f13aa4" "check" "--frozen" "--all" "--all-targets" "--message-format=json", 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] fbcbff0280894831c0b544cb81cba2efdd081a9c0a9b6712a2e586a5223efe76
[INFO] running `Command { std: "docker" "start" "-a" "fbcbff0280894831c0b544cb81cba2efdd081a9c0a9b6712a2e586a5223efe76", kill_on_drop: false }`
[INFO] [stderr]    Compiling unicode-xid v0.2.1
[INFO] [stderr]    Compiling bitflags v1.2.1
[INFO] [stderr]    Compiling syn v1.0.38
[INFO] [stderr]    Compiling log v0.4.11
[INFO] [stderr]    Compiling autocfg v1.0.0
[INFO] [stderr]    Compiling x86_64 v0.13.6
[INFO] [stderr]    Compiling x86_64 v0.14.0
[INFO] [stderr]    Compiling byteorder v1.3.4
[INFO] [stderr]    Compiling memchr v2.3.3
[INFO] [stderr]    Compiling version_check v0.9.2
[INFO] [stderr]     Checking bit_field v0.9.0
[INFO] [stderr]     Checking cfg-if v0.1.10
[INFO] [stderr]     Checking bit_field v0.10.0
[INFO] [stderr]     Checking scopeguard v1.1.0
[INFO] [stderr]     Checking volatile v0.4.4
[INFO] [stderr]     Checking xv7-usyscall v0.1.0 (/opt/rustwide/workdir/xv7-usyscall)
[INFO] [stderr]     Checking plain v0.2.3
[INFO] [stderr]     Checking utf8parse v0.2.0
[INFO] [stderr]     Checking either v1.5.3
[INFO] [stderr]     Checking zeroize v1.1.0
[INFO] [stderr]     Checking arrayvec v0.5.1
[INFO] [stderr]     Checking spin v0.5.2
[INFO] [stderr]     Checking radium v0.3.0
[INFO] [stderr]     Checking cfg-if v1.0.0
[INFO] [stderr]     Checking pc-keyboard v0.5.1
[INFO] [stderr]     Checking ucs2 v0.3.1
[INFO] [stderr]     Checking lock_api v0.3.4
[INFO] [stderr]     Checking lock_api v0.4.3
[INFO] [stderr]     Checking xv7-user v0.1.0 (/opt/rustwide/workdir/xv7-user)
[INFO] [stdout] warning: `extern` fn uses type `fn() -> T`, which is not FFI-safe
[INFO] [stdout]   --> xv7-user/src/rt.rs:21:11
[INFO] [stdout]    |
[INFO] [stdout] 21 |     main: fn() -> T,
[INFO] [stdout]    |           ^^^^^^^^^ not FFI-safe
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(improper_ctypes_definitions)]` on by default
[INFO] [stdout]    = help: consider using an `extern fn(...) -> ...` function pointer instead
[INFO] [stdout]    = note: this function pointer has Rust-specific calling convention
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: `extern` fn uses type `fn() -> T`, which is not FFI-safe
[INFO] [stdout]   --> xv7-user/src/rt.rs:21:11
[INFO] [stdout]    |
[INFO] [stdout] 21 |     main: fn() -> T,
[INFO] [stdout]    |           ^^^^^^^^^ not FFI-safe
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(improper_ctypes_definitions)]` on by default
[INFO] [stdout]    = help: consider using an `extern fn(...) -> ...` function pointer instead
[INFO] [stdout]    = note: this function pointer has Rust-specific calling convention
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Checking lazy_static v1.4.0
[INFO] [stderr]    Compiling proc-macro2 v1.0.19
[INFO] [stderr]     Checking bitvec v0.17.4
[INFO] [stdout] error: duplicate lang item in crate `std` (which `test` depends on): `panic_impl`.
[INFO] [stdout]   |
[INFO] [stdout]   = note: the lang item is first defined in crate `xv7_user` (which `init` depends on)
[INFO] [stdout]   = note: first definition in `xv7_user` loaded from /opt/rustwide/target/debug/deps/libxv7_user-b407318c2d3c4c42.rmeta
[INFO] [stdout]   = note: second definition in `std` loaded from /opt/rustwide/rustup-home/toolchains/45d8b6e68beee1c9c1ce92ae258a7e02f8f13aa4/lib/rustlib/x86_64-unknown-linux-gnu/lib/libstd-61556e43b375c2c0.rlib
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: duplicate lang item in crate `std` (which `test` depends on): `start`.
[INFO] [stdout]   |
[INFO] [stdout]   = note: the lang item is first defined in crate `xv7_user` (which `init` depends on)
[INFO] [stdout]   = note: first definition in `xv7_user` loaded from /opt/rustwide/target/debug/deps/libxv7_user-b407318c2d3c4c42.rmeta
[INFO] [stdout]   = note: second definition in `std` loaded from /opt/rustwide/rustup-home/toolchains/45d8b6e68beee1c9c1ce92ae258a7e02f8f13aa4/lib/rustlib/x86_64-unknown-linux-gnu/lib/libstd-61556e43b375c2c0.rlib
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `xv7-user`
[INFO] [stdout] error: aborting due to 2 previous errors
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr] 
[INFO] [stderr] To learn more, run the command again with --verbose.
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stderr] error: build failed
[INFO] running `Command { std: "docker" "inspect" "fbcbff0280894831c0b544cb81cba2efdd081a9c0a9b6712a2e586a5223efe76", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "fbcbff0280894831c0b544cb81cba2efdd081a9c0a9b6712a2e586a5223efe76", kill_on_drop: false }`
[INFO] [stdout] fbcbff0280894831c0b544cb81cba2efdd081a9c0a9b6712a2e586a5223efe76