[INFO] cloning repository https://github.com/bitcartel/rust-koans-solutions [INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/bitcartel/rust-koans-solutions" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fbitcartel%2Frust-koans-solutions", kill_on_drop: false }` [INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fbitcartel%2Frust-koans-solutions'... [INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }` [INFO] [stdout] fa1cc79b191627ba13abd5c639ffff97f6c9e08a [INFO] checking bitcartel/rust-koans-solutions against master#de32266a1780aa4ef748ce7f6200a1554fad0aca for pr-75585 [INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fbitcartel%2Frust-koans-solutions" "/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/bitcartel/rust-koans-solutions on toolchain de32266a1780aa4ef748ce7f6200a1554fad0aca [INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+de32266a1780aa4ef748ce7f6200a1554fad0aca" "read-manifest" "--manifest-path" "Cargo.toml", kill_on_drop: false }` [INFO] started tweaking git repo https://github.com/bitcartel/rust-koans-solutions [INFO] finished tweaking git repo https://github.com/bitcartel/rust-koans-solutions [INFO] tweaked toml for git repo https://github.com/bitcartel/rust-koans-solutions written to /workspace/builds/worker-7/source/Cargo.toml [INFO] crate git repo https://github.com/bitcartel/rust-koans-solutions already has a lockfile, it will not be regenerated [INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+de32266a1780aa4ef748ce7f6200a1554fad0aca" "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:d92eaeed33fa75130ca1ee6c8a01d1ffb62bac859dfdfb3450e3e5d1c0146529" "/opt/rustwide/cargo-home/bin/cargo" "+de32266a1780aa4ef748ce7f6200a1554fad0aca" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }` [INFO] [stdout] 75addc4250093e39cda47141a26f9f6f7c6a337b50af55b802c0902f790eaf31 [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" "75addc4250093e39cda47141a26f9f6f7c6a337b50af55b802c0902f790eaf31", kill_on_drop: false }` [INFO] running `Command { std: "docker" "inspect" "75addc4250093e39cda47141a26f9f6f7c6a337b50af55b802c0902f790eaf31", kill_on_drop: false }` [INFO] running `Command { std: "docker" "rm" "-f" "75addc4250093e39cda47141a26f9f6f7c6a337b50af55b802c0902f790eaf31", kill_on_drop: false }` [INFO] [stdout] 75addc4250093e39cda47141a26f9f6f7c6a337b50af55b802c0902f790eaf31 [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=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" "rustops/crates-build-env@sha256:d92eaeed33fa75130ca1ee6c8a01d1ffb62bac859dfdfb3450e3e5d1c0146529" "/opt/rustwide/cargo-home/bin/cargo" "+de32266a1780aa4ef748ce7f6200a1554fad0aca" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }` [INFO] [stdout] 550b7132e717b58839ba7a902cb4363a289ea5377eda755008a1c35c6db72279 [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" "550b7132e717b58839ba7a902cb4363a289ea5377eda755008a1c35c6db72279", kill_on_drop: false }` [INFO] [stderr] Compiling koans v0.2.2 (/opt/rustwide/workdir) [INFO] [stderr] error: failed to run custom build command for `koans v0.2.2 (/opt/rustwide/workdir)` [INFO] [stderr] [INFO] [stderr] Caused by: [INFO] [stderr] process didn't exit successfully: `/opt/rustwide/target/debug/build/koans-d9642fd870ee5afc/build-script-build` (exit code: 101) [INFO] [stderr] --- stderr [INFO] [stderr] thread 'main' panicked at 'Read-only file system (os error 30)', build.rs:13:22 [INFO] [stderr] stack backtrace: [INFO] [stderr] 0: 0x55fc41503760 - std::backtrace_rs::backtrace::libunwind::trace::ha1eabb142084ea37 [INFO] [stderr] at /rustc/de32266a1780aa4ef748ce7f6200a1554fad0aca/library/std/src/../../backtrace/src/backtrace/libunwind.rs:96 [INFO] [stderr] 1: 0x55fc41503760 - std::backtrace_rs::backtrace::trace_unsynchronized::hbb8825661d997281 [INFO] [stderr] at /rustc/de32266a1780aa4ef748ce7f6200a1554fad0aca/library/std/src/../../backtrace/src/backtrace/mod.rs:66 [INFO] [stderr] 2: 0x55fc41503760 - std::sys_common::backtrace::_print_fmt::h26d850e2f7183914 [INFO] [stderr] at /rustc/de32266a1780aa4ef748ce7f6200a1554fad0aca/library/std/src/sys_common/backtrace.rs:79 [INFO] [stderr] 3: 0x55fc41503760 - ::fmt::h3834b06f68a2b012 [INFO] [stderr] at /rustc/de32266a1780aa4ef748ce7f6200a1554fad0aca/library/std/src/sys_common/backtrace.rs:58 [INFO] [stderr] 4: 0x55fc4151cc2c - core::fmt::write::h3a043650ba7bf668 [INFO] [stderr] at /rustc/de32266a1780aa4ef748ce7f6200a1554fad0aca/library/core/src/fmt/mod.rs:1117 [INFO] [stderr] 5: 0x55fc41502095 - std::io::Write::write_fmt::h9c0c8944a1898139 [INFO] [stderr] at /rustc/de32266a1780aa4ef748ce7f6200a1554fad0aca/library/std/src/io/mod.rs:1510 [INFO] [stderr] 6: 0x55fc415058e0 - std::sys_common::backtrace::_print::h693c0c2cc41d4d10 [INFO] [stderr] at /rustc/de32266a1780aa4ef748ce7f6200a1554fad0aca/library/std/src/sys_common/backtrace.rs:61 [INFO] [stderr] 7: 0x55fc415058e0 - std::sys_common::backtrace::print::h213be73e5670b8ea [INFO] [stderr] at /rustc/de32266a1780aa4ef748ce7f6200a1554fad0aca/library/std/src/sys_common/backtrace.rs:48 [INFO] [stderr] 8: 0x55fc415058e0 - std::panicking::default_hook::{{closure}}::h2d49a3361cc4e7ea [INFO] [stderr] at /rustc/de32266a1780aa4ef748ce7f6200a1554fad0aca/library/std/src/panicking.rs:200 [INFO] [stderr] 9: 0x55fc4150562c - std::panicking::default_hook::hd41fbdeba93207ba [INFO] [stderr] at /rustc/de32266a1780aa4ef748ce7f6200a1554fad0aca/library/std/src/panicking.rs:219 [INFO] [stderr] 10: 0x55fc41505f43 - std::panicking::rust_panic_with_hook::hcab398664b4bd473 [INFO] [stderr] at /rustc/de32266a1780aa4ef748ce7f6200a1554fad0aca/library/std/src/panicking.rs:569 [INFO] [stderr] 11: 0x55fc41505b19 - std::panicking::begin_panic_handler::{{closure}}::h7512c6f2998ba93d [INFO] [stderr] at /rustc/de32266a1780aa4ef748ce7f6200a1554fad0aca/library/std/src/panicking.rs:476 [INFO] [stderr] 12: 0x55fc41503bcc - std::sys_common::backtrace::__rust_end_short_backtrace::h1a25d7e7e1864d3d [INFO] [stderr] at /rustc/de32266a1780aa4ef748ce7f6200a1554fad0aca/library/std/src/sys_common/backtrace.rs:153 [INFO] [stderr] 13: 0x55fc41505ad9 - rust_begin_unwind [INFO] [stderr] at /rustc/de32266a1780aa4ef748ce7f6200a1554fad0aca/library/std/src/panicking.rs:475 [INFO] [stderr] 14: 0x55fc41505a8b - std::panicking::begin_panic_fmt::h8af3eb0f50edc2d0 [INFO] [stderr] at /rustc/de32266a1780aa4ef748ce7f6200a1554fad0aca/library/std/src/panicking.rs:429 [INFO] [stderr] 15: 0x55fc414ee9a6 - build_script_build::main::h84c7fa4f8c6a7801 [INFO] [stderr] at /opt/rustwide/workdir/build.rs:13 [INFO] [stderr] 16: 0x55fc414f06ab - core::ops::function::FnOnce::call_once::h6f68b5d7497a0135 [INFO] [stderr] at /rustc/de32266a1780aa4ef748ce7f6200a1554fad0aca/library/core/src/ops/function.rs:233 [INFO] [stderr] 17: 0x55fc414eda5e - std::sys_common::backtrace::__rust_begin_short_backtrace::h7108fd1d47626de1 [INFO] [stderr] at /rustc/de32266a1780aa4ef748ce7f6200a1554fad0aca/library/std/src/sys_common/backtrace.rs:137 [INFO] [stderr] 18: 0x55fc414eeb91 - std::rt::lang_start::{{closure}}::h4f4268c7eaf507a3 [INFO] [stderr] at /rustc/de32266a1780aa4ef748ce7f6200a1554fad0aca/library/std/src/rt.rs:66 [INFO] [stderr] 19: 0x55fc41506352 - core::ops::function::impls:: for &F>::call_once::hde9814ae740a85dc [INFO] [stderr] at /rustc/de32266a1780aa4ef748ce7f6200a1554fad0aca/library/core/src/ops/function.rs:265 [INFO] [stderr] 20: 0x55fc41506352 - std::panicking::try::do_call::h3026bab8cd7540d7 [INFO] [stderr] at /rustc/de32266a1780aa4ef748ce7f6200a1554fad0aca/library/std/src/panicking.rs:373 [INFO] [stderr] 21: 0x55fc41506352 - std::panicking::try::h852bb5e5a66f7f84 [INFO] [stderr] at /rustc/de32266a1780aa4ef748ce7f6200a1554fad0aca/library/std/src/panicking.rs:337 [INFO] [stderr] 22: 0x55fc41506352 - std::panic::catch_unwind::hfeb0f3dddf7c6a72 [INFO] [stderr] at /rustc/de32266a1780aa4ef748ce7f6200a1554fad0aca/library/std/src/panic.rs:394 [INFO] [stderr] 23: 0x55fc41506352 - std::rt::lang_start_internal::h32f0ac6e87476559 [INFO] [stderr] at /rustc/de32266a1780aa4ef748ce7f6200a1554fad0aca/library/std/src/rt.rs:51 [INFO] [stderr] 24: 0x55fc414eeb67 - std::rt::lang_start::h1a33e54b955dd772 [INFO] [stderr] at /rustc/de32266a1780aa4ef748ce7f6200a1554fad0aca/library/std/src/rt.rs:65 [INFO] [stderr] 25: 0x55fc414eea7a - main [INFO] [stderr] 26: 0x7f5dc522d0b3 - __libc_start_main [INFO] [stderr] 27: 0x55fc414ec0ae - _start [INFO] [stderr] 28: 0x0 - [INFO] running `Command { std: "docker" "inspect" "550b7132e717b58839ba7a902cb4363a289ea5377eda755008a1c35c6db72279", kill_on_drop: false }` [INFO] running `Command { std: "docker" "rm" "-f" "550b7132e717b58839ba7a902cb4363a289ea5377eda755008a1c35c6db72279", kill_on_drop: false }` [INFO] [stdout] 550b7132e717b58839ba7a902cb4363a289ea5377eda755008a1c35c6db72279