[INFO] cloning repository https://github.com/llamicron/grader_template [INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/llamicron/grader_template" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fllamicron%2Fgrader_template", kill_on_drop: false }` [INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fllamicron%2Fgrader_template'... [INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }` [INFO] [stdout] 28e3f8dd69f4e6cf6ea85140862019299c678017 [INFO] testing llamicron/grader_template against 1.49.0 for beta-1.50-1 [INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fllamicron%2Fgrader_template" "/workspace/builds/worker-7/source", kill_on_drop: false }` [INFO] [stderr] Cloning into '/workspace/builds/worker-7/source'... [INFO] [stderr] done. [INFO] validating manifest of git repo https://github.com/llamicron/grader_template on toolchain 1.49.0 [INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.49.0" "read-manifest" "--manifest-path" "Cargo.toml", kill_on_drop: false }` [INFO] started tweaking git repo https://github.com/llamicron/grader_template [INFO] finished tweaking git repo https://github.com/llamicron/grader_template [INFO] tweaked toml for git repo https://github.com/llamicron/grader_template written to /workspace/builds/worker-7/source/Cargo.toml [INFO] crate git repo https://github.com/llamicron/grader_template already has a lockfile, it will not be regenerated [INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.49.0" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }` [INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7/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" "rustops/crates-build-env@sha256:c8ac004eab7d63a0ad09a2dde3d3353ba464f767bee4de425dc8f74c46a1905e" "/opt/rustwide/cargo-home/bin/cargo" "+1.49.0" "metadata" "--no-deps" "--format-version=1", 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] c1d6c68c51a7992e3f1ec6349c4c5e8755d25b6d3932fe959e1f97b25301509d [INFO] running `Command { std: "docker" "start" "-a" "c1d6c68c51a7992e3f1ec6349c4c5e8755d25b6d3932fe959e1f97b25301509d", kill_on_drop: false }` [INFO] running `Command { std: "docker" "inspect" "c1d6c68c51a7992e3f1ec6349c4c5e8755d25b6d3932fe959e1f97b25301509d", kill_on_drop: false }` [INFO] running `Command { std: "docker" "rm" "-f" "c1d6c68c51a7992e3f1ec6349c4c5e8755d25b6d3932fe959e1f97b25301509d", kill_on_drop: false }` [INFO] [stdout] c1d6c68c51a7992e3f1ec6349c4c5e8755d25b6d3932fe959e1f97b25301509d [INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7/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" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--user" "0:0" "--network" "none" "rustops/crates-build-env@sha256:c8ac004eab7d63a0ad09a2dde3d3353ba464f767bee4de425dc8f74c46a1905e" "/opt/rustwide/cargo-home/bin/cargo" "+1.49.0" "build" "--frozen" "--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] f4ebcc46faa11f0ebf118c83cd935c98c15275090d75bfcd6e203074e3546a89 [INFO] running `Command { std: "docker" "start" "-a" "f4ebcc46faa11f0ebf118c83cd935c98c15275090d75bfcd6e203074e3546a89", kill_on_drop: false }` [INFO] [stderr] Compiling libc v0.2.74 [INFO] [stderr] Compiling autocfg v1.0.0 [INFO] [stderr] Compiling proc-macro2 v1.0.19 [INFO] [stderr] Compiling syn v1.0.38 [INFO] [stderr] Compiling memchr v2.3.3 [INFO] [stderr] Compiling serde_derive v1.0.114 [INFO] [stderr] Compiling serde v1.0.114 [INFO] [stderr] Compiling tinyvec v0.3.3 [INFO] [stderr] Compiling itoa v0.4.6 [INFO] [stderr] Compiling pkg-config v0.3.18 [INFO] [stderr] Compiling getrandom v0.1.14 [INFO] [stderr] Compiling cc v1.0.58 [INFO] [stderr] Compiling fnv v1.0.7 [INFO] [stderr] Compiling bytes v0.5.6 [INFO] [stderr] Compiling futures-core v0.3.5 [INFO] [stderr] Compiling subtle v2.2.3 [INFO] [stderr] Compiling pin-project-internal v0.4.23 [INFO] [stderr] Compiling ppv-lite86 v0.2.8 [INFO] [stderr] Compiling pin-project-lite v0.1.7 [INFO] [stderr] Compiling openssl v0.10.30 [INFO] [stderr] Compiling once_cell v1.4.0 [INFO] [stderr] Compiling zeroize v1.1.0 [INFO] [stderr] Compiling foreign-types-shared v0.1.1 [INFO] [stderr] Compiling futures-sink v0.3.5 [INFO] [stderr] Compiling pin-utils v0.1.0 [INFO] [stderr] Compiling futures-io v0.3.5 [INFO] [stderr] Compiling native-tls v0.2.4 [INFO] [stderr] Compiling serde_json v1.0.57 [INFO] [stderr] Compiling openssl-probe v0.1.2 [INFO] [stderr] Compiling smallvec v1.4.1 [INFO] [stderr] Compiling state v0.4.1 [INFO] [stderr] Compiling try-lock v0.2.3 [INFO] [stderr] Compiling dtoa v0.4.6 [INFO] [stderr] Compiling encoding_rs v0.8.23 [INFO] [stderr] Compiling tower-service v0.3.0 [INFO] [stderr] Compiling lazycell v1.2.1 [INFO] [stderr] Compiling gimli v0.22.0 [INFO] [stderr] Compiling failure_derive v0.1.8 [INFO] [stderr] Compiling object v0.20.0 [INFO] [stderr] Compiling mime v0.3.16 [INFO] [stderr] Compiling linked-hash-map v0.5.3 [INFO] [stderr] Compiling rustc-demangle v0.1.16 [INFO] [stderr] Compiling ipnet v2.3.0 [INFO] [stderr] Compiling encode_unicode v0.3.6 [INFO] [stderr] Compiling regex-syntax v0.6.18 [INFO] [stderr] Compiling unicode-width v0.1.8 [INFO] [stderr] Compiling ansi_term v0.12.1 [INFO] [stderr] Compiling unicase v2.6.0 [INFO] [stderr] Compiling tracing-core v0.1.13 [INFO] [stderr] Compiling rocket_codegen v0.4.5 [INFO] [stderr] Compiling rocket v0.4.5 [INFO] [stderr] Compiling futures-channel v0.3.5 [INFO] [stderr] Compiling unicode-normalization v0.1.13 [INFO] [stderr] Compiling foreign-types v0.3.2 [INFO] [stderr] Compiling http v0.2.1 [INFO] [stderr] Compiling futures-task v0.3.5 [INFO] [stderr] Compiling hashbrown v0.8.2 [INFO] [stderr] Compiling indexmap v1.5.1 [INFO] [stderr] Compiling num-traits v0.2.12 [INFO] [stderr] Compiling num-integer v0.1.43 [INFO] [stderr] Compiling miniz_oxide v0.4.0 [INFO] [stderr] Compiling typenum v1.12.0 [INFO] [stderr] Compiling pear_codegen v0.1.4 [INFO] [stderr] Compiling yaml-rust v0.4.4 [INFO] [stderr] error: failed to run custom build command for `pear_codegen v0.1.4` [INFO] [stderr] [INFO] [stderr] Caused by: [INFO] [stderr] process didn't exit successfully: `/opt/rustwide/target/debug/build/pear_codegen-92914b60b18d1339/build-script-build` (exit code: 101) [INFO] [stderr] --- stderr [INFO] [stderr] Error: Pear requires a 'dev' or 'nightly' version of rustc. [INFO] [stderr] Installed version: 1.49.0 (2020-12-29) [INFO] [stderr] Minimum required: 1.31.0-nightly (2018-10-05) [INFO] [stderr] thread 'main' panicked at 'Aborting compilation due to incompatible compiler.', /opt/rustwide/cargo-home/registry/src/github.com-1ecc6299db9ec823/pear_codegen-0.1.4/build.rs:24:13 [INFO] [stderr] stack backtrace: [INFO] [stderr] 0: 0x560cae357be0 - std::backtrace_rs::backtrace::libunwind::trace::h04d12fdcddff82aa [INFO] [stderr] at /rustc/e1884a8e3c3e813aada8254edfa120e85bf5ffca/library/std/src/../../backtrace/src/backtrace/libunwind.rs:100:5 [INFO] [stderr] 1: 0x560cae357be0 - std::backtrace_rs::backtrace::trace_unsynchronized::h1459b974b6fbe5e1 [INFO] [stderr] at /rustc/e1884a8e3c3e813aada8254edfa120e85bf5ffca/library/std/src/../../backtrace/src/backtrace/mod.rs:66:5 [INFO] [stderr] 2: 0x560cae357be0 - std::sys_common::backtrace::_print_fmt::h9b8396a669123d95 [INFO] [stderr] at /rustc/e1884a8e3c3e813aada8254edfa120e85bf5ffca/library/std/src/sys_common/backtrace.rs:67:5 [INFO] [stderr] 3: 0x560cae357be0 - ::fmt::he009dcaaa75eed60 [INFO] [stderr] at /rustc/e1884a8e3c3e813aada8254edfa120e85bf5ffca/library/std/src/sys_common/backtrace.rs:46:22 [INFO] [stderr] 4: 0x560cae37531c - core::fmt::write::h77b4746b0dea1dd3 [INFO] [stderr] at /rustc/e1884a8e3c3e813aada8254edfa120e85bf5ffca/library/core/src/fmt/mod.rs:1078:17 [INFO] [stderr] 5: 0x560cae3551c2 - std::io::Write::write_fmt::heb7e50902e98831c [INFO] [stderr] at /rustc/e1884a8e3c3e813aada8254edfa120e85bf5ffca/library/std/src/io/mod.rs:1518:15 [INFO] [stderr] 6: 0x560cae359d45 - std::sys_common::backtrace::_print::h2d880c9e69a21be9 [INFO] [stderr] at /rustc/e1884a8e3c3e813aada8254edfa120e85bf5ffca/library/std/src/sys_common/backtrace.rs:49:5 [INFO] [stderr] 7: 0x560cae359d45 - std::sys_common::backtrace::print::h5f02b1bb49f36879 [INFO] [stderr] at /rustc/e1884a8e3c3e813aada8254edfa120e85bf5ffca/library/std/src/sys_common/backtrace.rs:36:9 [INFO] [stderr] 8: 0x560cae359d45 - std::panicking::default_hook::{{closure}}::h658e288a7a809b29 [INFO] [stderr] at /rustc/e1884a8e3c3e813aada8254edfa120e85bf5ffca/library/std/src/panicking.rs:208:50 [INFO] [stderr] 9: 0x560cae3599e8 - std::panicking::default_hook::hb52d73f0da9a4bb8 [INFO] [stderr] at /rustc/e1884a8e3c3e813aada8254edfa120e85bf5ffca/library/std/src/panicking.rs:227:9 [INFO] [stderr] 10: 0x560cae35a481 - std::panicking::rust_panic_with_hook::hfe7e1c684e3e6462 [INFO] [stderr] at /rustc/e1884a8e3c3e813aada8254edfa120e85bf5ffca/library/std/src/panicking.rs:593:17 [INFO] [stderr] 11: 0x560cae326ffa - std::panicking::begin_panic::{{closure}}::ha7ef58b997801243 [INFO] [stderr] at /rustc/e1884a8e3c3e813aada8254edfa120e85bf5ffca/library/std/src/panicking.rs:522:9 [INFO] [stderr] 12: 0x560cae324798 - std::sys_common::backtrace::__rust_end_short_backtrace::hdb01d6570dc6cfb8 [INFO] [stderr] at /rustc/e1884a8e3c3e813aada8254edfa120e85bf5ffca/library/std/src/sys_common/backtrace.rs:141:18 [INFO] [stderr] 13: 0x560cae326f37 - std::panicking::begin_panic::hb2e065bfe68f27a0 [INFO] [stderr] at /rustc/e1884a8e3c3e813aada8254edfa120e85bf5ffca/library/std/src/panicking.rs:521:12 [INFO] [stderr] 14: 0x560cae322832 - build_script_build::main::h07bbcd10bedfcbae [INFO] [stderr] at /opt/rustwide/cargo-home/registry/src/github.com-1ecc6299db9ec823/pear_codegen-0.1.4/build.rs:24:13 [INFO] [stderr] 15: 0x560cae326c0b - core::ops::function::FnOnce::call_once::h81e923573ac7a399 [INFO] [stderr] at /rustc/e1884a8e3c3e813aada8254edfa120e85bf5ffca/library/core/src/ops/function.rs:227:5 [INFO] [stderr] 16: 0x560cae3247ce - std::sys_common::backtrace::__rust_begin_short_backtrace::h8510cee661c1a3fe [INFO] [stderr] at /rustc/e1884a8e3c3e813aada8254edfa120e85bf5ffca/library/std/src/sys_common/backtrace.rs:125:18 [INFO] [stderr] 17: 0x560cae326b31 - std::rt::lang_start::{{closure}}::h14066acb54257453 [INFO] [stderr] at /rustc/e1884a8e3c3e813aada8254edfa120e85bf5ffca/library/std/src/rt.rs:66:18 [INFO] [stderr] 18: 0x560cae35a8a7 - core::ops::function::impls:: for &F>::call_once::h57e2a071d427b24c [INFO] [stderr] at /rustc/e1884a8e3c3e813aada8254edfa120e85bf5ffca/library/core/src/ops/function.rs:259:13 [INFO] [stderr] 19: 0x560cae35a8a7 - std::panicking::try::do_call::h81cbbe0c3b30a28e [INFO] [stderr] at /rustc/e1884a8e3c3e813aada8254edfa120e85bf5ffca/library/std/src/panicking.rs:381:40 [INFO] [stderr] 20: 0x560cae35a8a7 - std::panicking::try::hbeeb95b4e1f0a876 [INFO] [stderr] at /rustc/e1884a8e3c3e813aada8254edfa120e85bf5ffca/library/std/src/panicking.rs:345:19 [INFO] [stderr] 21: 0x560cae35a8a7 - std::panic::catch_unwind::h59c48ccb40a0bf20 [INFO] [stderr] at /rustc/e1884a8e3c3e813aada8254edfa120e85bf5ffca/library/std/src/panic.rs:396:14 [INFO] [stderr] 22: 0x560cae35a8a7 - std::rt::lang_start_internal::ha53ab63f88fee728 [INFO] [stderr] at /rustc/e1884a8e3c3e813aada8254edfa120e85bf5ffca/library/std/src/rt.rs:51:25 [INFO] [stderr] 23: 0x560cae326b07 - std::rt::lang_start::h75eb175e5b7768b9 [INFO] [stderr] at /rustc/e1884a8e3c3e813aada8254edfa120e85bf5ffca/library/std/src/rt.rs:65:5 [INFO] [stderr] 24: 0x560cae322fca - main [INFO] [stderr] 25: 0x7fd29ab6a0b3 - __libc_start_main [INFO] [stderr] 26: 0x560cae3220ae - _start [INFO] [stderr] 27: 0x0 - [INFO] [stderr] warning: build failed, waiting for other jobs to finish... [INFO] [stderr] error: build failed [INFO] running `Command { std: "docker" "inspect" "f4ebcc46faa11f0ebf118c83cd935c98c15275090d75bfcd6e203074e3546a89", kill_on_drop: false }` [INFO] running `Command { std: "docker" "rm" "-f" "f4ebcc46faa11f0ebf118c83cd935c98c15275090d75bfcd6e203074e3546a89", kill_on_drop: false }` [INFO] [stdout] f4ebcc46faa11f0ebf118c83cd935c98c15275090d75bfcd6e203074e3546a89