[INFO] fetching crate lab_grader 0.11.0...
[INFO] testing lab_grader-0.11.0 against 1.76.0 for beta-1.77-1
[INFO] extracting crate lab_grader 0.11.0 into /workspace/builds/worker-7-tc1/source
[INFO] validating manifest of crates.io crate lab_grader 0.11.0 on toolchain 1.76.0
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+1.76.0" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate lab_grader 0.11.0
[INFO] finished tweaking crates.io crate lab_grader 0.11.0
[INFO] tweaked toml for crates.io crate lab_grader 0.11.0 written to /workspace/builds/worker-7-tc1/source/Cargo.toml
[INFO] crate crates.io crate lab_grader 0.11.0 already has a lockfile, it will not be regenerated
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+1.76.0" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Updating crates.io index
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded universal-hash v0.3.0
[INFO] [stderr]   Downloaded adler32 v1.1.0
[INFO] [stderr]   Downloaded ctor v0.1.15
[INFO] [stderr]   Downloaded ghash v0.2.3
[INFO] [stderr]   Downloaded aead v0.2.0
[INFO] [stderr]   Downloaded polyval v0.3.3
[INFO] [stderr]   Downloaded subtle v2.2.3
[INFO] [stderr]   Downloaded hermit-abi v0.1.14
[INFO] [stderr]   Downloaded zeroize v1.1.0
[INFO] [stderr]   Downloaded block-cipher-trait v0.6.2
[INFO] [stderr]   Downloaded cookie v0.11.3
[INFO] [stderr]   Downloaded cc v1.0.56
[INFO] [stderr]   Downloaded yaml-rust v0.4.4
[INFO] [stderr]   Downloaded rocket v0.4.5
[INFO] [stderr]   Downloaded libc v0.2.71
[INFO] [stderr]   Downloaded bstr v0.2.13
[INFO] [stderr]   Downloaded addr2line v0.12.2
[INFO] [stderr]   Downloaded rocket_http v0.4.5
[INFO] [stderr]   Downloaded backtrace v0.3.49
[INFO] [stderr]   Downloaded aes-soft v0.3.3
[INFO] [stderr]   Downloaded aesni v0.6.0
[INFO] [stderr]   Downloaded aes v0.3.2
[INFO] [stderr]   Downloaded aes-gcm v0.5.0
[INFO] [stderr]   Downloaded serde_yaml v0.8.13
[INFO] [stderr]   Downloaded rocket_contrib v0.4.5
[INFO] [stderr]   Downloaded prettytable-rs v0.8.0
[INFO] [stderr]   Downloaded hkdf v0.8.0
[INFO] [stderr]   Downloaded rocket_codegen v0.4.5
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-tc1/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@sha256:2788e3201cd34a07e3172128adcd8b3090168a8e3bcc40d7c032b9dda1df7d1c" "/opt/rustwide/cargo-home/bin/cargo" "+1.76.0" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 1e8945b5dc328a5691b026b441cd494fbb30d9593c6d19fcf03f32343f05f32d
[INFO] running `Command { std: "docker" "start" "-a" "1e8945b5dc328a5691b026b441cd494fbb30d9593c6d19fcf03f32343f05f32d", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "1e8945b5dc328a5691b026b441cd494fbb30d9593c6d19fcf03f32343f05f32d", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "1e8945b5dc328a5691b026b441cd494fbb30d9593c6d19fcf03f32343f05f32d", kill_on_drop: false }`
[INFO] [stdout] 1e8945b5dc328a5691b026b441cd494fbb30d9593c6d19fcf03f32343f05f32d
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-tc1/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=warn" "-e" "RUSTDOCFLAGS=--cap-lints=warn" "-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@sha256:2788e3201cd34a07e3172128adcd8b3090168a8e3bcc40d7c032b9dda1df7d1c" "/opt/rustwide/cargo-home/bin/cargo" "+1.76.0" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 7e2c44561997775c7ff95b088d12bb36894c58999fee1ea2df816f5292cd5929
[INFO] running `Command { std: "docker" "start" "-a" "7e2c44561997775c7ff95b088d12bb36894c58999fee1ea2df816f5292cd5929", kill_on_drop: false }`
[INFO] [stderr]    Compiling libc v0.2.71
[INFO] [stderr]    Compiling cfg-if v0.1.10
[INFO] [stderr]    Compiling proc-macro2 v1.0.18
[INFO] [stderr]    Compiling autocfg v1.0.0
[INFO] [stderr]    Compiling unicode-xid v0.2.1
[INFO] [stderr]    Compiling syn v1.0.33
[INFO] [stderr]    Compiling typenum v1.12.0
[INFO] [stderr]    Compiling log v0.4.8
[INFO] [stderr]    Compiling version_check v0.9.2
[INFO] [stderr]    Compiling byteorder v1.3.4
[INFO] [stderr]    Compiling memchr v2.3.3
[INFO] [stderr]    Compiling bitflags v1.2.1
[INFO] [stderr]    Compiling serde_derive v1.0.114
[INFO] [stderr]    Compiling proc-macro2 v0.4.30
[INFO] [stderr]    Compiling serde v1.0.114
[INFO] [stderr]    Compiling slab v0.4.2
[INFO] [stderr]    Compiling num_cpus v1.13.0
[INFO] [stderr]    Compiling matches v0.1.8
[INFO] [stderr]    Compiling yansi v0.5.0
[INFO] [stderr]    Compiling quote v1.0.7
[INFO] [stderr]    Compiling unicode-xid v0.1.0
[INFO] [stderr]    Compiling tinyvec v0.3.3
[INFO] [stderr]    Compiling unicode-bidi v0.3.4
[INFO] [stderr]    Compiling iovec v0.1.4
[INFO] [stderr]    Compiling net2 v0.2.34
[INFO] [stderr]    Compiling itoa v0.4.6
[INFO] [stderr]    Compiling unicode-normalization v0.1.13
[INFO] [stderr]    Compiling generic-array v0.12.3
[INFO] [stderr]    Compiling syn v0.15.44
[INFO] [stderr]    Compiling time v0.1.43
[INFO] [stderr]    Compiling quote v0.6.13
[INFO] [stderr]    Compiling mio v0.6.22
[INFO] [stderr]    Compiling indexmap v1.4.0
[INFO] [stderr]    Compiling getrandom v0.1.14
[INFO] [stderr]    Compiling httparse v1.3.4
[INFO] [stderr]    Compiling cc v1.0.56
[INFO] [stderr]    Compiling pkg-config v0.3.17
[INFO] [stderr]    Compiling bytes v0.5.5
[INFO] [stderr]    Compiling futures-core v0.3.5
[INFO] [stderr]    Compiling subtle v2.2.3
[INFO] [stderr]    Compiling universal-hash v0.3.0
[INFO] [stderr]    Compiling block-cipher-trait v0.6.2
[INFO] [stderr]    Compiling digest v0.8.1
[INFO] [stderr]    Compiling subtle v1.0.0
[INFO] [stderr]    Compiling pin-project-internal v0.4.22
[INFO] [stderr]    Compiling version_check v0.1.5
[INFO] [stderr]    Compiling crypto-mac v0.7.0
[INFO] [stderr]    Compiling aes-soft v0.3.3
[INFO] [stderr]    Compiling polyval v0.3.3
[INFO] [stderr]    Compiling rand_core v0.5.1
[INFO] [stderr]    Compiling openssl-sys v0.9.58
[INFO] [stderr]    Compiling unicase v1.4.2
[INFO] [stderr]    Compiling pear_codegen v0.1.4
[INFO] [stderr]    Compiling ppv-lite86 v0.2.8
[INFO] [stderr]    Compiling pin-project-lite v0.1.7
[INFO] [stderr]    Compiling ghash v0.2.3
[INFO] [stderr]    Compiling tokio v0.2.21
[INFO] [stderr]    Compiling aes v0.3.2
[INFO] [stderr]    Compiling hmac v0.7.1
[INFO] [stderr]    Compiling block-buffer v0.7.3
[INFO] [stderr]    Compiling idna v0.1.5
[INFO] [stderr]    Compiling aead v0.2.0
[INFO] [stderr] error: failed to run custom build command for `pear_codegen v0.1.4`
[INFO] [stderr] note: To improve backtraces for build dependencies, set the CARGO_PROFILE_DEV_BUILD_OVERRIDE_DEBUG=true environment variable to enable debug information generation.
[INFO] [stderr] 
[INFO] [stderr] Caused by:
[INFO] [stderr]   process didn't exit successfully: `/opt/rustwide/target/debug/build/pear_codegen-a2887e3fbd4e8eab/build-script-build` (exit status: 101)
[INFO] [stderr]   --- stderr
[INFO] [stderr]   Error: Pear requires a 'dev' or 'nightly' version of rustc.
[INFO] [stderr]   Installed version: 1.76.0 (2024-02-04)
[INFO] [stderr]   Minimum required:  1.31.0-nightly (2018-10-05)
[INFO] [stderr]   thread 'main' panicked at /opt/rustwide/cargo-home/registry/src/index.crates.io-6f17d22bba15001f/pear_codegen-0.1.4/build.rs:24:13:
[INFO] [stderr]   Aborting compilation due to incompatible compiler.
[INFO] [stderr]   stack backtrace:
[INFO] [stderr]      0:     0x5574473c7ac6 - std::backtrace_rs::backtrace::libunwind::trace::hbee8a7973eeb6c93
[INFO] [stderr]                                  at /rustc/07dca489ac2d933c78d3c5158e3f43beefeb02ce/library/std/src/../../backtrace/src/backtrace/libunwind.rs:104:5
[INFO] [stderr]      1:     0x5574473c7ac6 - std::backtrace_rs::backtrace::trace_unsynchronized::hc8ac75eea3aa6899
[INFO] [stderr]                                  at /rustc/07dca489ac2d933c78d3c5158e3f43beefeb02ce/library/std/src/../../backtrace/src/backtrace/mod.rs:66:5
[INFO] [stderr]      2:     0x5574473c7ac6 - std::sys_common::backtrace::_print_fmt::hc7f3e3b5298b1083
[INFO] [stderr]                                  at /rustc/07dca489ac2d933c78d3c5158e3f43beefeb02ce/library/std/src/sys_common/backtrace.rs:68:5
[INFO] [stderr]      3:     0x5574473c7ac6 - <std::sys_common::backtrace::_print::DisplayBacktrace as core::fmt::Display>::fmt::hbb235daedd7c6190
[INFO] [stderr]                                  at /rustc/07dca489ac2d933c78d3c5158e3f43beefeb02ce/library/std/src/sys_common/backtrace.rs:44:22
[INFO] [stderr]      4:     0x5574473ea340 - core::fmt::rt::Argument::fmt::h76c38a80d925a410
[INFO] [stderr]                                  at /rustc/07dca489ac2d933c78d3c5158e3f43beefeb02ce/library/core/src/fmt/rt.rs:142:9
[INFO] [stderr]      5:     0x5574473ea340 - core::fmt::write::h3ed6aeaa977c8e45
[INFO] [stderr]                                  at /rustc/07dca489ac2d933c78d3c5158e3f43beefeb02ce/library/core/src/fmt/mod.rs:1120:17
[INFO] [stderr]      6:     0x5574473c5aff - std::io::Write::write_fmt::h78b18af5775fedb5
[INFO] [stderr]                                  at /rustc/07dca489ac2d933c78d3c5158e3f43beefeb02ce/library/std/src/io/mod.rs:1810:15
[INFO] [stderr]      7:     0x5574473c78a4 - std::sys_common::backtrace::_print::h5d645a07e0fcfdbb
[INFO] [stderr]                                  at /rustc/07dca489ac2d933c78d3c5158e3f43beefeb02ce/library/std/src/sys_common/backtrace.rs:47:5
[INFO] [stderr]      8:     0x5574473c78a4 - std::sys_common::backtrace::print::h85035a511aafe7a8
[INFO] [stderr]                                  at /rustc/07dca489ac2d933c78d3c5158e3f43beefeb02ce/library/std/src/sys_common/backtrace.rs:34:9
[INFO] [stderr]      9:     0x5574473c8e07 - std::panicking::default_hook::{{closure}}::hcce8cea212785a25
[INFO] [stderr]     10:     0x5574473c8b69 - std::panicking::default_hook::hf5fcb0f213fe709a
[INFO] [stderr]                                  at /rustc/07dca489ac2d933c78d3c5158e3f43beefeb02ce/library/std/src/panicking.rs:292:9
[INFO] [stderr]     11:     0x5574473c9298 - std::panicking::rust_panic_with_hook::h095fccf1dc9379ee
[INFO] [stderr]                                  at /rustc/07dca489ac2d933c78d3c5158e3f43beefeb02ce/library/std/src/panicking.rs:779:13
[INFO] [stderr]     12:     0x557447394bee - std::panicking::begin_panic::{{closure}}::h88e5c85b2560be86
[INFO] [stderr]     13:     0x557447394ad6 - std::sys_common::backtrace::__rust_end_short_backtrace::hf4cc24b38104592c
[INFO] [stderr]     14:     0x557447394b77 - std::panicking::begin_panic::h1e6bb8f88565bdd7
[INFO] [stderr]     15:     0x557447397dfc - build_script_build::main::h86b18eaa04711343
[INFO] [stderr]     16:     0x557447394d93 - core::ops::function::FnOnce::call_once::h58395e7eca858f0d
[INFO] [stderr]     17:     0x557447394ae6 - std::sys_common::backtrace::__rust_begin_short_backtrace::h864d1665716f721d
[INFO] [stderr]     18:     0x557447394b39 - std::rt::lang_start::{{closure}}::hc203c8bf50dceca9
[INFO] [stderr]     19:     0x5574473c22b1 - core::ops::function::impls::<impl core::ops::function::FnOnce<A> for &F>::call_once::h37600b1e5eea4ecd
[INFO] [stderr]                                  at /rustc/07dca489ac2d933c78d3c5158e3f43beefeb02ce/library/core/src/ops/function.rs:284:13
[INFO] [stderr]     20:     0x5574473c22b1 - std::panicking::try::do_call::hb4bda49fa13a0c2b
[INFO] [stderr]                                  at /rustc/07dca489ac2d933c78d3c5158e3f43beefeb02ce/library/std/src/panicking.rs:552:40
[INFO] [stderr]     21:     0x5574473c22b1 - std::panicking::try::h8bbf75149211aaaa
[INFO] [stderr]                                  at /rustc/07dca489ac2d933c78d3c5158e3f43beefeb02ce/library/std/src/panicking.rs:516:19
[INFO] [stderr]     22:     0x5574473c22b1 - std::panic::catch_unwind::h8c78ec68ebea34cb
[INFO] [stderr]                                  at /rustc/07dca489ac2d933c78d3c5158e3f43beefeb02ce/library/std/src/panic.rs:142:14
[INFO] [stderr]     23:     0x5574473c22b1 - std::rt::lang_start_internal::{{closure}}::hffdf44a19fd9e220
[INFO] [stderr]                                  at /rustc/07dca489ac2d933c78d3c5158e3f43beefeb02ce/library/std/src/rt.rs:148:48
[INFO] [stderr]     24:     0x5574473c22b1 - std::panicking::try::do_call::hcb3194972c74716d
[INFO] [stderr]                                  at /rustc/07dca489ac2d933c78d3c5158e3f43beefeb02ce/library/std/src/panicking.rs:552:40
[INFO] [stderr]     25:     0x5574473c22b1 - std::panicking::try::hcdc6892c5f0dba4c
[INFO] [stderr]                                  at /rustc/07dca489ac2d933c78d3c5158e3f43beefeb02ce/library/std/src/panicking.rs:516:19
[INFO] [stderr]     26:     0x5574473c22b1 - std::panic::catch_unwind::h4910beb4573f4776
[INFO] [stderr]                                  at /rustc/07dca489ac2d933c78d3c5158e3f43beefeb02ce/library/std/src/panic.rs:142:14
[INFO] [stderr]     27:     0x5574473c22b1 - std::rt::lang_start_internal::h6939038e2873596b
[INFO] [stderr]                                  at /rustc/07dca489ac2d933c78d3c5158e3f43beefeb02ce/library/std/src/rt.rs:148:20
[INFO] [stderr]     28:     0x557447394b17 - std::rt::lang_start::h64e10f93462d9c45
[INFO] [stderr]     29:     0x557447398325 - main
[INFO] [stderr]     30:     0x7fe314118d90 - <unknown>
[INFO] [stderr]     31:     0x7fe314118e40 - __libc_start_main
[INFO] [stderr]     32:     0x557447394925 - _start
[INFO] [stderr]     33:                0x0 - <unknown>
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] running `Command { std: "docker" "inspect" "7e2c44561997775c7ff95b088d12bb36894c58999fee1ea2df816f5292cd5929", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "7e2c44561997775c7ff95b088d12bb36894c58999fee1ea2df816f5292cd5929", kill_on_drop: false }`
[INFO] [stdout] 7e2c44561997775c7ff95b088d12bb36894c58999fee1ea2df816f5292cd5929
