[INFO] cloning repository https://github.com/JScearcy/Rust-Koans [INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/JScearcy/Rust-Koans" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FJScearcy%2FRust-Koans", kill_on_drop: false }` [INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FJScearcy%2FRust-Koans'... [INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }` [INFO] [stdout] cb4bceeb057657f833916c019f96605c7170382c [INFO] checking JScearcy/Rust-Koans against master#0d37dca25a51fb900a402c94c8818ad1c2789e30 for pr-77526 [INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FJScearcy%2FRust-Koans" "/workspace/builds/worker-0/source", kill_on_drop: false }` [INFO] [stderr] Cloning into '/workspace/builds/worker-0/source'... [INFO] [stderr] done. [INFO] validating manifest of git repo https://github.com/JScearcy/Rust-Koans on toolchain 0d37dca25a51fb900a402c94c8818ad1c2789e30 [INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+0d37dca25a51fb900a402c94c8818ad1c2789e30" "read-manifest" "--manifest-path" "Cargo.toml", kill_on_drop: false }` [INFO] started tweaking git repo https://github.com/JScearcy/Rust-Koans [INFO] finished tweaking git repo https://github.com/JScearcy/Rust-Koans [INFO] tweaked toml for git repo https://github.com/JScearcy/Rust-Koans written to /workspace/builds/worker-0/source/Cargo.toml [INFO] crate git repo https://github.com/JScearcy/Rust-Koans already has a lockfile, it will not be regenerated [INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+0d37dca25a51fb900a402c94c8818ad1c2789e30" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }` [INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0/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" "+0d37dca25a51fb900a402c94c8818ad1c2789e30" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }` [INFO] [stdout] 9fc982c7bc4a81dd6b14bf5056dadd36be69c70e949a1d1bb1d622477ced07bb [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" "9fc982c7bc4a81dd6b14bf5056dadd36be69c70e949a1d1bb1d622477ced07bb", kill_on_drop: false }` [INFO] running `Command { std: "docker" "inspect" "9fc982c7bc4a81dd6b14bf5056dadd36be69c70e949a1d1bb1d622477ced07bb", kill_on_drop: false }` [INFO] running `Command { std: "docker" "rm" "-f" "9fc982c7bc4a81dd6b14bf5056dadd36be69c70e949a1d1bb1d622477ced07bb", kill_on_drop: false }` [INFO] [stdout] 9fc982c7bc4a81dd6b14bf5056dadd36be69c70e949a1d1bb1d622477ced07bb [INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0/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" "+0d37dca25a51fb900a402c94c8818ad1c2789e30" "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] ebd6bd7250a5aaddec358c202c0fd7ce82cf8406b8e4aa457727854f64059631 [INFO] running `Command { std: "docker" "start" "-a" "ebd6bd7250a5aaddec358c202c0fd7ce82cf8406b8e4aa457727854f64059631", kill_on_drop: false }` [INFO] [stderr] Compiling koans v0.2.0 (/opt/rustwide/workdir) [INFO] [stderr] error: failed to run custom build command for `koans v0.2.0 (/opt/rustwide/workdir)` [INFO] [stderr] [INFO] [stderr] Caused by: [INFO] [stderr] process didn't exit successfully: `/opt/rustwide/target/debug/build/koans-aacaadd02b453c57/build-script-build` (exit code: 101) [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" }', build.rs:7:10 [INFO] [stderr] stack backtrace: [INFO] [stderr] 0: 0x558235323190 - std::backtrace_rs::backtrace::libunwind::trace::he85dfb3ae4206056 [INFO] [stderr] at /rustc/0d37dca25a51fb900a402c94c8818ad1c2789e30/library/std/src/../../backtrace/src/backtrace/libunwind.rs:96 [INFO] [stderr] 1: 0x558235323190 - std::backtrace_rs::backtrace::trace_unsynchronized::h1ad28094d7b00c21 [INFO] [stderr] at /rustc/0d37dca25a51fb900a402c94c8818ad1c2789e30/library/std/src/../../backtrace/src/backtrace/mod.rs:66 [INFO] [stderr] 2: 0x558235323190 - std::sys_common::backtrace::_print_fmt::h901b54610713cd21 [INFO] [stderr] at /rustc/0d37dca25a51fb900a402c94c8818ad1c2789e30/library/std/src/sys_common/backtrace.rs:79 [INFO] [stderr] 3: 0x558235323190 - ::fmt::hb0ad78ee1571f7e0 [INFO] [stderr] at /rustc/0d37dca25a51fb900a402c94c8818ad1c2789e30/library/std/src/sys_common/backtrace.rs:58 [INFO] [stderr] 4: 0x55823533b70c - core::fmt::write::h1857a60b204f1b6a [INFO] [stderr] at /rustc/0d37dca25a51fb900a402c94c8818ad1c2789e30/library/core/src/fmt/mod.rs:1080 [INFO] [stderr] 5: 0x558235321872 - std::io::Write::write_fmt::hf7b7d7b243f84a36 [INFO] [stderr] at /rustc/0d37dca25a51fb900a402c94c8818ad1c2789e30/library/std/src/io/mod.rs:1516 [INFO] [stderr] 6: 0x5582353252bd - std::sys_common::backtrace::_print::hd093978a5287b8ff [INFO] [stderr] at /rustc/0d37dca25a51fb900a402c94c8818ad1c2789e30/library/std/src/sys_common/backtrace.rs:61 [INFO] [stderr] 7: 0x5582353252bd - std::sys_common::backtrace::print::h20f46787581d56d7 [INFO] [stderr] at /rustc/0d37dca25a51fb900a402c94c8818ad1c2789e30/library/std/src/sys_common/backtrace.rs:48 [INFO] [stderr] 8: 0x5582353252bd - std::panicking::default_hook::{{closure}}::h486cbb4b82ffc357 [INFO] [stderr] at /rustc/0d37dca25a51fb900a402c94c8818ad1c2789e30/library/std/src/panicking.rs:208 [INFO] [stderr] 9: 0x558235324f68 - std::panicking::default_hook::h4190c9e3edd4d591 [INFO] [stderr] at /rustc/0d37dca25a51fb900a402c94c8818ad1c2789e30/library/std/src/panicking.rs:227 [INFO] [stderr] 10: 0x558235325941 - std::panicking::rust_panic_with_hook::h72e78719cdda225c [INFO] [stderr] at /rustc/0d37dca25a51fb900a402c94c8818ad1c2789e30/library/std/src/panicking.rs:577 [INFO] [stderr] 11: 0x5582353254e9 - std::panicking::begin_panic_handler::{{closure}}::h8bd07dbd34150a96 [INFO] [stderr] at /rustc/0d37dca25a51fb900a402c94c8818ad1c2789e30/library/std/src/panicking.rs:484 [INFO] [stderr] 12: 0x55823532361c - std::sys_common::backtrace::__rust_end_short_backtrace::hdb6b3066ad29028a [INFO] [stderr] at /rustc/0d37dca25a51fb900a402c94c8818ad1c2789e30/library/std/src/sys_common/backtrace.rs:153 [INFO] [stderr] 13: 0x5582353254a9 - rust_begin_unwind [INFO] [stderr] at /rustc/0d37dca25a51fb900a402c94c8818ad1c2789e30/library/std/src/panicking.rs:483 [INFO] [stderr] 14: 0x55823533aa21 - core::panicking::panic_fmt::hb15d6f55e8472f62 [INFO] [stderr] at /rustc/0d37dca25a51fb900a402c94c8818ad1c2789e30/library/core/src/panicking.rs:85 [INFO] [stderr] 15: 0x55823533a843 - core::option::expect_none_failed::he492a18657d97593 [INFO] [stderr] at /rustc/0d37dca25a51fb900a402c94c8818ad1c2789e30/library/core/src/option.rs:1234 [INFO] [stderr] 16: 0x558235311b9b - core::result::Result::unwrap::he797a29aada39f4c [INFO] [stderr] at /rustc/0d37dca25a51fb900a402c94c8818ad1c2789e30/library/core/src/result.rs:973 [INFO] [stderr] 17: 0x5582353119c7 - build_script_build::main::h7b22f25aafeebb1d [INFO] [stderr] at /opt/rustwide/workdir/build.rs:4 [INFO] [stderr] 18: 0x5582353116ab - core::ops::function::FnOnce::call_once::h4357ed5d7c9c51d2 [INFO] [stderr] at /rustc/0d37dca25a51fb900a402c94c8818ad1c2789e30/library/core/src/ops/function.rs:227 [INFO] [stderr] 19: 0x5582353115ae - std::sys_common::backtrace::__rust_begin_short_backtrace::he3974144a6019e4b [INFO] [stderr] at /rustc/0d37dca25a51fb900a402c94c8818ad1c2789e30/library/std/src/sys_common/backtrace.rs:137 [INFO] [stderr] 20: 0x558235311921 - std::rt::lang_start::{{closure}}::h8fa635ab02335cc4 [INFO] [stderr] at /rustc/0d37dca25a51fb900a402c94c8818ad1c2789e30/library/std/src/rt.rs:66 [INFO] [stderr] 21: 0x558235325d67 - core::ops::function::impls:: for &F>::call_once::h5e15f43ce28787f7 [INFO] [stderr] at /rustc/0d37dca25a51fb900a402c94c8818ad1c2789e30/library/core/src/ops/function.rs:259 [INFO] [stderr] 22: 0x558235325d67 - std::panicking::try::do_call::h764f1891769113e9 [INFO] [stderr] at /rustc/0d37dca25a51fb900a402c94c8818ad1c2789e30/library/std/src/panicking.rs:381 [INFO] [stderr] 23: 0x558235325d67 - std::panicking::try::h0f2fe4fdd5e0ad19 [INFO] [stderr] at /rustc/0d37dca25a51fb900a402c94c8818ad1c2789e30/library/std/src/panicking.rs:345 [INFO] [stderr] 24: 0x558235325d67 - std::panic::catch_unwind::h1634e40dd3a19f80 [INFO] [stderr] at /rustc/0d37dca25a51fb900a402c94c8818ad1c2789e30/library/std/src/panic.rs:382 [INFO] [stderr] 25: 0x558235325d67 - std::rt::lang_start_internal::h8d4bc7b854bbd5fe [INFO] [stderr] at /rustc/0d37dca25a51fb900a402c94c8818ad1c2789e30/library/std/src/rt.rs:51 [INFO] [stderr] 26: 0x5582353118f7 - std::rt::lang_start::h0f875e5a57cbb8dc [INFO] [stderr] at /rustc/0d37dca25a51fb900a402c94c8818ad1c2789e30/library/std/src/rt.rs:65 [INFO] [stderr] 27: 0x558235311a0a - main [INFO] [stderr] 28: 0x7f7b70b600b3 - __libc_start_main [INFO] [stderr] 29: 0x55823531109e - _start [INFO] [stderr] 30: 0x0 - [INFO] running `Command { std: "docker" "inspect" "ebd6bd7250a5aaddec358c202c0fd7ce82cf8406b8e4aa457727854f64059631", kill_on_drop: false }` [INFO] running `Command { std: "docker" "rm" "-f" "ebd6bd7250a5aaddec358c202c0fd7ce82cf8406b8e4aa457727854f64059631", kill_on_drop: false }` [INFO] [stdout] ebd6bd7250a5aaddec358c202c0fd7ce82cf8406b8e4aa457727854f64059631