[INFO] updating cached repository JScearcy/Rust-Koans [INFO] running `"git" "fetch" "--all"` [INFO] [stdout] Fetching origin [INFO] [stderr] From git://github.com/JScearcy/Rust-Koans [INFO] [stderr] * branch HEAD -> FETCH_HEAD [INFO] running `"git" "clone" "work/cache/sources/gh/JScearcy/Rust-Koans" "work/ex/pr-62849/sources/master#435236b8877cdb98c82eaebfb7887782277265c5/gh/JScearcy/Rust-Koans"` [INFO] [stderr] Cloning into 'work/ex/pr-62849/sources/master#435236b8877cdb98c82eaebfb7887782277265c5/gh/JScearcy/Rust-Koans'... [INFO] [stderr] done. [INFO] running `"git" "clone" "work/cache/sources/gh/JScearcy/Rust-Koans" "work/ex/pr-62849/sources/try#b5c7f157c20453dde8d47371abe73b32351b4e7f/gh/JScearcy/Rust-Koans"` [INFO] [stderr] Cloning into 'work/ex/pr-62849/sources/try#b5c7f157c20453dde8d47371abe73b32351b4e7f/gh/JScearcy/Rust-Koans'... [INFO] [stderr] done. [INFO] running `"git" "rev-parse" "HEAD"` [INFO] [stdout] cb4bceeb057657f833916c019f96605c7170382c [INFO] sha for GitHub repo JScearcy/Rust-Koans: cb4bceeb057657f833916c019f96605c7170382c [INFO] validating manifest of JScearcy/Rust-Koans on toolchain master#435236b8877cdb98c82eaebfb7887782277265c5 [INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+435236b8877cdb98c82eaebfb7887782277265c5-alt" "read-manifest" "--manifest-path" "Cargo.toml"` [INFO] validating manifest of JScearcy/Rust-Koans on toolchain try#b5c7f157c20453dde8d47371abe73b32351b4e7f [INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+b5c7f157c20453dde8d47371abe73b32351b4e7f-alt" "read-manifest" "--manifest-path" "Cargo.toml"` [INFO] started frobbing JScearcy/Rust-Koans [INFO] finished frobbing JScearcy/Rust-Koans [INFO] frobbed toml for JScearcy/Rust-Koans written to work/ex/pr-62849/sources/master#435236b8877cdb98c82eaebfb7887782277265c5/gh/JScearcy/Rust-Koans/Cargo.toml [INFO] started frobbing JScearcy/Rust-Koans [INFO] finished frobbing JScearcy/Rust-Koans [INFO] frobbed toml for JScearcy/Rust-Koans written to work/ex/pr-62849/sources/try#b5c7f157c20453dde8d47371abe73b32351b4e7f/gh/JScearcy/Rust-Koans/Cargo.toml [INFO] crate JScearcy/Rust-Koans already has a lockfile, it will not be regenerated [INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+435236b8877cdb98c82eaebfb7887782277265c5-alt" "fetch" "--locked" "--manifest-path" "Cargo.toml"` [INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+b5c7f157c20453dde8d47371abe73b32351b4e7f-alt" "fetch" "--locked" "--manifest-path" "Cargo.toml"` [INFO] checking JScearcy/Rust-Koans against try#b5c7f157c20453dde8d47371abe73b32351b4e7f for pr-62849 [INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/pr-62849/worker-7/try#b5c7f157c20453dde8d47371abe73b32351b4e7f:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/pr-62849/sources/try#b5c7f157c20453dde8d47371abe73b32351b4e7f/gh/JScearcy/Rust-Koans:/opt/crater/workdir:ro,Z" "-v" "/mnt/big/crater/work/local/cargo-home:/opt/crater/cargo-home:ro,Z" "-v" "/mnt/big/crater/work/local/rustup-home:/opt/crater/rustup-home:ro,Z" "-e" "USER_ID=1000" "-e" "SOURCE_DIR=/opt/crater/workdir" "-e" "MAP_USER_ID=1000" "-e" "CARGO_TARGET_DIR=/opt/crater/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=forbid" "-e" "CARGO_HOME=/opt/crater/cargo-home" "-e" "RUSTUP_HOME=/opt/crater/rustup-home" "-w" "/opt/crater/workdir" "-m" "1536M" "--network" "none" "rustops/crates-build-env" "/opt/crater/cargo-home/bin/cargo" "+b5c7f157c20453dde8d47371abe73b32351b4e7f-alt" "check" "--frozen" "--all" "--all-targets"` [INFO] [stdout] ee67051a06106671eb23574199deb1ec4fdd1d6981c7b766b3863a7b4c6dd6e1 [INFO] running `"docker" "start" "-a" "ee67051a06106671eb23574199deb1ec4fdd1d6981c7b766b3863a7b4c6dd6e1"` [INFO] [stderr] Compiling koans v0.2.0 (/opt/crater/workdir) [INFO] [stderr] error: failed to run custom build command for `koans v0.2.0 (/opt/crater/workdir)` [INFO] [stderr] [INFO] [stderr] Caused by: [INFO] [stderr] process didn't exit successfully: `/opt/crater/target/debug/build/koans-6f442fb9653d9d2d/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" }', src/libcore/result.rs:1084:5 [INFO] [stderr] stack backtrace: [INFO] [stderr] 0: 0x56498591dc9b - backtrace::backtrace::libunwind::trace::h80786597adfabf72 [INFO] [stderr] at /cargo/registry/src/github.com-1ecc6299db9ec823/backtrace-0.3.34/src/backtrace/libunwind.rs:88 [INFO] [stderr] 1: 0x56498591dc9b - backtrace::backtrace::trace_unsynchronized::hcac650387ca20819 [INFO] [stderr] at /cargo/registry/src/github.com-1ecc6299db9ec823/backtrace-0.3.34/src/backtrace/mod.rs:66 [INFO] [stderr] 2: 0x56498591dc9b - std::sys_common::backtrace::_print::h1b9354ff68cb5a2b [INFO] [stderr] at src/libstd/sys_common/backtrace.rs:47 [INFO] [stderr] 3: 0x56498591dc9b - std::sys_common::backtrace::print::hee32569be499cf66 [INFO] [stderr] at src/libstd/sys_common/backtrace.rs:36 [INFO] [stderr] 4: 0x56498591dc9b - std::panicking::default_hook::{{closure}}::h57d4a5a18212e6c4 [INFO] [stderr] at src/libstd/panicking.rs:200 [INFO] [stderr] 5: 0x56498591d976 - std::panicking::default_hook::h6b5ac8e0c8ee81de [INFO] [stderr] at src/libstd/panicking.rs:214 [INFO] [stderr] 6: 0x56498591e35d - std::panicking::rust_panic_with_hook::h087293a0d0382d86 [INFO] [stderr] at src/libstd/panicking.rs:477 [INFO] [stderr] 7: 0x56498591dee2 - std::panicking::continue_panic_fmt::h5398c0b14056de59 [INFO] [stderr] at src/libstd/panicking.rs:384 [INFO] [stderr] 8: 0x56498591ddc6 - rust_begin_unwind [INFO] [stderr] at src/libstd/panicking.rs:311 [INFO] [stderr] 9: 0x56498593263d - core::panicking::panic_fmt::hc22ef80bd93ddcf4 [INFO] [stderr] at src/libcore/panicking.rs:85 [INFO] [stderr] 10: 0x564985932737 - core::result::unwrap_failed::h52618310aa6d47ad [INFO] [stderr] at src/libcore/result.rs:1084 [INFO] [stderr] 11: 0x564985916e40 - core::result::Result::unwrap::hf949fdf0ca809845 [INFO] [stderr] at /rustc/b5c7f157c20453dde8d47371abe73b32351b4e7f/src/libcore/result.rs:852 [INFO] [stderr] 12: 0x564985916d61 - build_script_build::main::h47a09f1171e89741 [INFO] [stderr] at /opt/crater/workdir/build.rs:4 [INFO] [stderr] 13: 0x564985916cb0 - std::rt::lang_start::{{closure}}::h9252955002d13ab9 [INFO] [stderr] at /rustc/b5c7f157c20453dde8d47371abe73b32351b4e7f/src/libstd/rt.rs:64 [INFO] [stderr] 14: 0x56498591ddb3 - std::rt::lang_start_internal::{{closure}}::h1a060554ddace6f7 [INFO] [stderr] at src/libstd/rt.rs:49 [INFO] [stderr] 15: 0x56498591ddb3 - std::panicking::try::do_call::h36cfd8d9c1d0d936 [INFO] [stderr] at src/libstd/panicking.rs:296 [INFO] [stderr] 16: 0x56498591fe7a - __rust_maybe_catch_panic [INFO] [stderr] at src/libpanic_unwind/lib.rs:80 [INFO] [stderr] 17: 0x56498591e86d - std::panicking::try::h225224763b892cde [INFO] [stderr] at src/libstd/panicking.rs:275 [INFO] [stderr] 18: 0x56498591e86d - std::panic::catch_unwind::h3043ed737cbd6e8e [INFO] [stderr] at src/libstd/panic.rs:394 [INFO] [stderr] 19: 0x56498591e86d - std::rt::lang_start_internal::h97b8d999a39debed [INFO] [stderr] at src/libstd/rt.rs:48 [INFO] [stderr] 20: 0x564985916c89 - std::rt::lang_start::he5d1c754c805d9f8 [INFO] [stderr] at /rustc/b5c7f157c20453dde8d47371abe73b32351b4e7f/src/libstd/rt.rs:64 [INFO] [stderr] 21: 0x564985916daa - main [INFO] [stderr] 22: 0x7f18f210b2e1 - __libc_start_main [INFO] [stderr] 23: 0x56498591689a - _start [INFO] [stderr] 24: 0x0 - [INFO] [stderr] [INFO] running `"docker" "inspect" "ee67051a06106671eb23574199deb1ec4fdd1d6981c7b766b3863a7b4c6dd6e1"` [INFO] running `"docker" "rm" "-f" "ee67051a06106671eb23574199deb1ec4fdd1d6981c7b766b3863a7b4c6dd6e1"` [INFO] [stdout] ee67051a06106671eb23574199deb1ec4fdd1d6981c7b766b3863a7b4c6dd6e1