[INFO] cloning repository https://github.com/luojia65/luojia-os-labs
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/luojia65/luojia-os-labs" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fluojia65%2Fluojia-os-labs", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fluojia65%2Fluojia-os-labs'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] efe6c41bc592847b276d61d60c5436b3db637919
[INFO] checking luojia65/luojia-os-labs against master#0a8629bff642c3c3b84bb644c0099194f063b627 for pr-86231
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fluojia65%2Fluojia-os-labs" "/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/luojia65/luojia-os-labs on toolchain 0a8629bff642c3c3b84bb644c0099194f063b627
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+0a8629bff642c3c3b84bb644c0099194f063b627" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/luojia65/luojia-os-labs
[INFO] finished tweaking git repo https://github.com/luojia65/luojia-os-labs
[INFO] tweaked toml for git repo https://github.com/luojia65/luojia-os-labs written to /workspace/builds/worker-3/source/Cargo.toml
[INFO] crate git repo https://github.com/luojia65/luojia-os-labs already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+0a8629bff642c3c3b84bb644c0099194f063b627" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Blocking waiting for file lock on package cache
[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" "+0a8629bff642c3c3b84bb644c0099194f063b627" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 83fe5421dee705570780a59f257dfce342c4fc089a3fde8d6255d6019e003502
[INFO] running `Command { std: "docker" "start" "-a" "83fe5421dee705570780a59f257dfce342c4fc089a3fde8d6255d6019e003502", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "83fe5421dee705570780a59f257dfce342c4fc089a3fde8d6255d6019e003502", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "83fe5421dee705570780a59f257dfce342c4fc089a3fde8d6255d6019e003502", kill_on_drop: false }`
[INFO] [stdout] 83fe5421dee705570780a59f257dfce342c4fc089a3fde8d6255d6019e003502
[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" "+0a8629bff642c3c3b84bb644c0099194f063b627" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] e9773470e181a0498964a754a8c62cf5f086be3b359e9330eb9437520b79c368
[INFO] running `Command { std: "docker" "start" "-a" "e9773470e181a0498964a754a8c62cf5f086be3b359e9330eb9437520b79c368", kill_on_drop: false }`
[INFO] [stderr]     Checking r0 v1.0.0
[INFO] [stderr]    Compiling memchr v2.3.4
[INFO] [stderr]    Compiling semver-parser v0.7.0
[INFO] [stderr]    Compiling regex-syntax v0.6.23
[INFO] [stderr]    Compiling spin v0.5.2
[INFO] [stderr]    Compiling batch-kernel-user v0.1.0 (/opt/rustwide/workdir/01-batch-kernel/user)
[INFO] [stderr]    Compiling yield-batch-kernel-user v0.1.0 (/opt/rustwide/workdir/01a-yield-batch-kern/user)
[INFO] [stderr]    Compiling magic-return-user v0.1.0 (/opt/rustwide/workdir/01b-magic-return-kern/user)
[INFO] [stderr]    Compiling multi-program-user v0.1.0 (/opt/rustwide/workdir/02-multi-program-kern/user)
[INFO] [stderr]     Checking bit_field v0.10.1
[INFO] [stderr]    Compiling trap-return-user v0.1.0 (/opt/rustwide/workdir/02b-trap-return-kern/user)
[INFO] [stderr]     Checking spin v0.7.1
[INFO] [stderr]    Compiling mmu-user v0.1.0 (/opt/rustwide/workdir/03-mmu-users)
[INFO] [stderr]    Compiling complex-ctx-user v0.1.0 (/opt/rustwide/workdir/02a-complex-ctx-kern/user)
[INFO] [stderr]     Checking scopeguard v1.1.0
[INFO] [stderr]     Checking woke v0.0.2
[INFO] [stderr]    Compiling virt-addr-kern v0.1.0 (/opt/rustwide/workdir/03-virt-addr-kern)
[INFO] [stderr]    Compiling template-kernel v0.1.0 (/opt/rustwide/workdir/00-template-kernel)
[INFO] [stderr]    Compiling magic-return-kern v0.1.0 (/opt/rustwide/workdir/01b-magic-return-kern/kernel)
[INFO] [stderr]    Compiling batch-kernel v0.1.0 (/opt/rustwide/workdir/01-batch-kernel/kernel)
[INFO] [stderr]    Compiling yield-batch-kernel v0.1.0 (/opt/rustwide/workdir/01a-yield-batch-kern/kernel)
[INFO] [stderr]    Compiling va-switch-kern v0.1.0 (/opt/rustwide/workdir/03a-va-switch-kern)
[INFO] [stderr]    Compiling trap-return-kern v0.1.0 (/opt/rustwide/workdir/02b-trap-return-kern/kernel)
[INFO] [stderr]    Compiling multi-program-kern v0.1.0 (/opt/rustwide/workdir/02-multi-program-kern/kernel)
[INFO] [stderr]    Compiling complex-ctx-kern v0.1.0 (/opt/rustwide/workdir/02a-complex-ctx-kern/kernel)
[INFO] [stderr]     Checking bitflags v1.2.1
[INFO] [stderr]     Checking spin v0.9.0
[INFO] [stderr]     Checking lock_api v0.4.4
[INFO] [stderr]    Compiling lazy_static v1.4.0
[INFO] [stderr]    Compiling semver v0.9.0
[INFO] [stderr]     Checking buddy_system_allocator v0.6.0
[INFO] [stderr]     Checking buddy_system_allocator v0.8.0
[INFO] [stderr] error: failed to run custom build command for `trap-return-kern v0.1.0 (/opt/rustwide/workdir/02b-trap-return-kern/kernel)`
[INFO] [stderr] 
[INFO] [stderr] Caused by:
[INFO] [stderr]   process didn't exit successfully: `/opt/rustwide/target/debug/build/trap-return-kern-0e8b86c66ec3e07b/build-script-build` (exit status: 101)
[INFO] [stderr]   --- stdout
[INFO] [stderr]   cargo:rerun-if-changed=build.rs
[INFO] [stderr]   cargo:rerun-if-changed=src/linker64.ld
[INFO] [stderr]   cargo:rustc-link-search=/opt/rustwide/target/debug/build/trap-return-kern-a09558dd8a93ef11/out
[INFO] [stderr]   cargo:rerun-if-changed=../user/src/
[INFO] [stderr] 
[INFO] [stderr]   --- stderr
[INFO] [stderr]   thread 'main' panicked at 'called `Result::unwrap()` on an `Err` value: Os { code: 30, kind: Other, message: "Read-only file system" }', 02b-trap-return-kern/kernel/build.rs:25:48
[INFO] [stderr]   stack backtrace:
[INFO] [stderr]      0:     0x5604e5ca2d60 - std::backtrace_rs::backtrace::libunwind::trace::hfa838fc631229987
[INFO] [stderr]                                  at /rustc/0a8629bff642c3c3b84bb644c0099194f063b627/library/std/src/../../backtrace/src/backtrace/libunwind.rs:90:5
[INFO] [stderr]      1:     0x5604e5ca2d60 - std::backtrace_rs::backtrace::trace_unsynchronized::h93a23e36ec026219
[INFO] [stderr]                                  at /rustc/0a8629bff642c3c3b84bb644c0099194f063b627/library/std/src/../../backtrace/src/backtrace/mod.rs:66:5
[INFO] [stderr]      2:     0x5604e5ca2d60 - std::sys_common::backtrace::_print_fmt::hba56c7f796a4152f
[INFO] [stderr]                                  at /rustc/0a8629bff642c3c3b84bb644c0099194f063b627/library/std/src/sys_common/backtrace.rs:67:5
[INFO] [stderr]      3:     0x5604e5ca2d60 - <std::sys_common::backtrace::_print::DisplayBacktrace as core::fmt::Display>::fmt::h214637f1e26310e1
[INFO] [stderr]                                  at /rustc/0a8629bff642c3c3b84bb644c0099194f063b627/library/std/src/sys_common/backtrace.rs:46:22
[INFO] [stderr]      4:     0x5604e5cbcd0c - core::fmt::write::h7aa6cd0067dca82a
[INFO] [stderr]                                  at /rustc/0a8629bff642c3c3b84bb644c0099194f063b627/library/core/src/fmt/mod.rs:1110:17
[INFO] [stderr]      5:     0x5604e5ca1445 - std::io::Write::write_fmt::heb07fc0616bbd06d
[INFO] [stderr]                                  at /rustc/0a8629bff642c3c3b84bb644c0099194f063b627/library/std/src/io/mod.rs:1588:15
[INFO] [stderr]      6:     0x5604e5ca4acb - std::sys_common::backtrace::_print::h2c2441c37e894fb5
[INFO] [stderr]                                  at /rustc/0a8629bff642c3c3b84bb644c0099194f063b627/library/std/src/sys_common/backtrace.rs:49:5
[INFO] [stderr]      7:     0x5604e5ca4acb - std::sys_common::backtrace::print::h4fb679ac439362ea
[INFO] [stderr]                                  at /rustc/0a8629bff642c3c3b84bb644c0099194f063b627/library/std/src/sys_common/backtrace.rs:36:9
[INFO] [stderr]      8:     0x5604e5ca4acb - std::panicking::default_hook::{{closure}}::h56bbadec2356e5d2
[INFO] [stderr]                                  at /rustc/0a8629bff642c3c3b84bb644c0099194f063b627/library/std/src/panicking.rs:208:50
[INFO] [stderr]      9:     0x5604e5ca45a1 - std::panicking::default_hook::hb25822b45f6fdc4e
[INFO] [stderr]                                  at /rustc/0a8629bff642c3c3b84bb644c0099194f063b627/library/std/src/panicking.rs:225:9
[INFO] [stderr]     10:     0x5604e5ca5194 - std::panicking::rust_panic_with_hook::h4da5578e7277d2d4
[INFO] [stderr]                                  at /rustc/0a8629bff642c3c3b84bb644c0099194f063b627/library/std/src/panicking.rs:622:17
[INFO] [stderr]     11:     0x5604e5ca4c77 - std::panicking::begin_panic_handler::{{closure}}::h003783ddb3cba4e8
[INFO] [stderr]                                  at /rustc/0a8629bff642c3c3b84bb644c0099194f063b627/library/std/src/panicking.rs:519:13
[INFO] [stderr]     12:     0x5604e5ca323c - std::sys_common::backtrace::__rust_end_short_backtrace::hd138d2032731ed21
[INFO] [stderr]                                  at /rustc/0a8629bff642c3c3b84bb644c0099194f063b627/library/std/src/sys_common/backtrace.rs:141:18
[INFO] [stderr]     13:     0x5604e5ca4bd9 - rust_begin_unwind
[INFO] [stderr]                                  at /rustc/0a8629bff642c3c3b84bb644c0099194f063b627/library/std/src/panicking.rs:515:5
[INFO] [stderr]     14:     0x5604e5c84071 - core::panicking::panic_fmt::hbe99dddd3092ba3c
[INFO] [stderr]                                  at /rustc/0a8629bff642c3c3b84bb644c0099194f063b627/library/core/src/panicking.rs:92:14
[INFO] [stderr]     15:     0x5604e5c84103 - core::result::unwrap_failed::hf79563fef9d11ab8
[INFO] [stderr]                                  at /rustc/0a8629bff642c3c3b84bb644c0099194f063b627/library/core/src/result.rs:1355:5
[INFO] [stderr]     16:     0x5604e5c9106e - core::result::Result<T,E>::unwrap::h728c113750673f02
[INFO] [stderr]                                  at /rustc/0a8629bff642c3c3b84bb644c0099194f063b627/library/core/src/result.rs:1037:23
[INFO] [stderr]     17:     0x5604e5c891b4 - build_script_build::insert_app_data::hebc0b86cb833d315
[INFO] [stderr]                                  at /opt/rustwide/workdir/02b-trap-return-kern/kernel/build.rs:25:17
[INFO] [stderr]     18:     0x5604e5c890ee - build_script_build::main::ha25d4c9b1b54efde
[INFO] [stderr]                                  at /opt/rustwide/workdir/02b-trap-return-kern/kernel/build.rs:21:5
[INFO] [stderr]     19:     0x5604e5c8b7db - core::ops::function::FnOnce::call_once::h33ba0191107616e9
[INFO] [stderr]                                  at /rustc/0a8629bff642c3c3b84bb644c0099194f063b627/library/core/src/ops/function.rs:227:5
[INFO] [stderr]     20:     0x5604e5c8d45e - std::sys_common::backtrace::__rust_begin_short_backtrace::h5160c5e11552561f
[INFO] [stderr]                                  at /rustc/0a8629bff642c3c3b84bb644c0099194f063b627/library/std/src/sys_common/backtrace.rs:125:18
[INFO] [stderr]     21:     0x5604e5c8a491 - std::rt::lang_start::{{closure}}::h1aff22bda6b6eb99
[INFO] [stderr]                                  at /rustc/0a8629bff642c3c3b84bb644c0099194f063b627/library/std/src/rt.rs:49:18
[INFO] [stderr]     22:     0x5604e5ca5699 - core::ops::function::impls::<impl core::ops::function::FnOnce<A> for &F>::call_once::hd933294140eb11aa
[INFO] [stderr]                                  at /rustc/0a8629bff642c3c3b84bb644c0099194f063b627/library/core/src/ops/function.rs:259:13
[INFO] [stderr]     23:     0x5604e5ca5699 - std::panicking::try::do_call::h8342fe3d9218b807
[INFO] [stderr]                                  at /rustc/0a8629bff642c3c3b84bb644c0099194f063b627/library/std/src/panicking.rs:401:40
[INFO] [stderr]     24:     0x5604e5ca5699 - std::panicking::try::hcbd73d6d0d58a8f0
[INFO] [stderr]                                  at /rustc/0a8629bff642c3c3b84bb644c0099194f063b627/library/std/src/panicking.rs:365:19
[INFO] [stderr]     25:     0x5604e5ca5699 - std::panic::catch_unwind::hde9cf73f810acfcc
[INFO] [stderr]                                  at /rustc/0a8629bff642c3c3b84bb644c0099194f063b627/library/std/src/panic.rs:434:14
[INFO] [stderr]     26:     0x5604e5ca5699 - std::rt::lang_start_internal::heb39e7ea6e5d6f6f
[INFO] [stderr]                                  at /rustc/0a8629bff642c3c3b84bb644c0099194f063b627/library/std/src/rt.rs:34:21
[INFO] [stderr]     27:     0x5604e5c8a470 - std::rt::lang_start::hb8a8556b40b29d01
[INFO] [stderr]                                  at /rustc/0a8629bff642c3c3b84bb644c0099194f063b627/library/std/src/rt.rs:48:5
[INFO] [stderr]     28:     0x5604e5c8a2ac - main
[INFO] [stderr]     29:     0x7fe8f54eb0b3 - __libc_start_main
[INFO] [stderr]     30:     0x5604e5c8480e - _start
[INFO] [stderr]     31:                0x0 - <unknown>
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stderr] error: build failed
[INFO] running `Command { std: "docker" "inspect" "e9773470e181a0498964a754a8c62cf5f086be3b359e9330eb9437520b79c368", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "e9773470e181a0498964a754a8c62cf5f086be3b359e9330eb9437520b79c368", kill_on_drop: false }`
[INFO] [stdout] e9773470e181a0498964a754a8c62cf5f086be3b359e9330eb9437520b79c368