[INFO] updating cached repository knack-supply/curve-tracer [INFO] running `"git" "fetch" "--all"` [INFO] [stdout] Fetching origin [INFO] [stderr] From git://github.com/knack-supply/curve-tracer [INFO] [stderr] * branch HEAD -> FETCH_HEAD [INFO] running `"git" "clone" "work/cache/sources/gh/knack-supply/curve-tracer" "work/ex/beta-1.38-1/sources/1.37.0/gh/knack-supply/curve-tracer"` [INFO] [stderr] Cloning into 'work/ex/beta-1.38-1/sources/1.37.0/gh/knack-supply/curve-tracer'... [INFO] [stderr] done. [INFO] running `"git" "clone" "work/cache/sources/gh/knack-supply/curve-tracer" "work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/knack-supply/curve-tracer"` [INFO] [stderr] Cloning into 'work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/knack-supply/curve-tracer'... [INFO] [stderr] done. [INFO] running `"git" "rev-parse" "HEAD"` [INFO] [stdout] 15ff945573a164bb2a851a9731b0e905fe1ee5ed [INFO] sha for GitHub repo knack-supply/curve-tracer: 15ff945573a164bb2a851a9731b0e905fe1ee5ed [INFO] validating manifest of knack-supply/curve-tracer on toolchain 1.37.0 [INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+1.37.0" "read-manifest" "--manifest-path" "Cargo.toml"` [INFO] validating manifest of knack-supply/curve-tracer on toolchain beta-2019-08-13 [INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+beta-2019-08-13" "read-manifest" "--manifest-path" "Cargo.toml"` [INFO] started frobbing knack-supply/curve-tracer [INFO] finished frobbing knack-supply/curve-tracer [INFO] frobbed toml for knack-supply/curve-tracer written to work/ex/beta-1.38-1/sources/1.37.0/gh/knack-supply/curve-tracer/Cargo.toml [INFO] started frobbing knack-supply/curve-tracer [INFO] finished frobbing knack-supply/curve-tracer [INFO] frobbed toml for knack-supply/curve-tracer written to work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/knack-supply/curve-tracer/Cargo.toml [INFO] crate knack-supply/curve-tracer already has a lockfile, it will not be regenerated [INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+1.37.0" "fetch" "--locked" "--manifest-path" "Cargo.toml"` [INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+beta-2019-08-13" "fetch" "--locked" "--manifest-path" "Cargo.toml"` [INFO] testing knack-supply/curve-tracer against beta-2019-08-13 for beta-1.38-1 [INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.38-1/worker-1/beta-2019-08-13:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/knack-supply/curve-tracer:/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=warn" "-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" "+beta-2019-08-13" "build" "--frozen"` [INFO] [stdout] fae9a70f02065024cd9cecbf4f3f7ed69174466508a6e4d511092b160fc91e15 [INFO] running `"docker" "start" "-a" "fae9a70f02065024cd9cecbf4f3f7ed69174466508a6e4d511092b160fc91e15"` [INFO] [stderr] Compiling proc-macro2 v0.4.27 [INFO] [stderr] Compiling cc v1.0.30 [INFO] [stderr] Compiling memchr v2.2.0 [INFO] [stderr] Compiling gio v0.6.0 [INFO] [stderr] Compiling cairo-rs v0.6.0 [INFO] [stderr] Compiling gdk v0.10.0 [INFO] [stderr] Compiling gtk v0.6.0 [INFO] [stderr] Compiling either v1.5.1 [INFO] [stderr] Compiling glib-sys v0.8.0 [INFO] [stderr] Compiling gobject-sys v0.8.0 [INFO] [stderr] Compiling gio-sys v0.8.0 [INFO] [stderr] Compiling backtrace v0.3.14 [INFO] [stderr] Compiling cairo-sys-rs v0.8.0 [INFO] [stderr] Compiling gdk-sys v0.8.0 [INFO] [stderr] Compiling gtk-sys v0.8.0 [INFO] [stderr] Compiling itertools v0.8.0 [INFO] [stderr] Compiling measure_time v0.6.0 [INFO] [stderr] Compiling crc32fast v1.2.0 [INFO] [stderr] Compiling rand_os v0.1.2 [INFO] [stderr] Compiling hashbrown v0.1.8 [INFO] [stderr] Compiling term v0.5.1 [INFO] [stderr] Compiling num-complex v0.2.1 [INFO] [stderr] Compiling approx v0.3.1 [INFO] [stderr] Compiling autodiff v0.1.5 [INFO] [stderr] Compiling noisy_float v0.1.9 [INFO] [stderr] Compiling clap v2.32.0 [INFO] [stderr] Compiling rand v0.6.5 [INFO] [stderr] Compiling libflate v0.1.20 [INFO] [stderr] Compiling winres v0.1.8 [INFO] [stderr] Compiling pango-sys v0.8.0 [INFO] [stderr] Compiling atk-sys v0.8.0 [INFO] [stderr] Compiling alga v0.8.2 [INFO] [stderr] Compiling quote v0.6.11 [INFO] [stderr] Compiling simplelog v0.5.3 [INFO] [stderr] Compiling glib v0.7.1 [INFO] [stderr] Compiling gdk-pixbuf-sys v0.8.0 [INFO] [stderr] Compiling pango v0.6.0 [INFO] [stderr] Compiling backtrace-sys v0.1.28 [INFO] [stderr] Compiling libloading v0.5.0 [INFO] [stderr] Compiling atk v0.6.0 [INFO] [stderr] Compiling syn v0.15.27 [INFO] [stderr] Compiling aho-corasick v0.6.10 [INFO] [stderr] Compiling nom v4.2.2 [INFO] [stderr] Compiling csv-core v0.1.5 [INFO] [stderr] Compiling gdk-pixbuf v0.6.0 [INFO] [stderr] Compiling regex v1.1.2 [INFO] [stderr] Compiling csv v1.0.5 [INFO] [stderr] Compiling nalgebra v0.17.2 [INFO] [stderr] Compiling cexpr v0.3.4 [INFO] [stderr] Compiling clang-sys v0.26.4 [INFO] [stderr] Compiling env_logger v0.6.0 [INFO] [stderr] error: Could not compile `syn`. [INFO] [stderr] [INFO] [stderr] Caused by: [INFO] [stderr] process didn't exit successfully: `rustc --crate-name syn /opt/crater/cargo-home/registry/src/github.com-1ecc6299db9ec823/syn-0.15.27/src/lib.rs --error-format=json --json=diagnostic-rendered-ansi,artifacts --crate-type lib --emit=dep-info,metadata,link -C debuginfo=2 --cfg 'feature="clone-impls"' --cfg 'feature="default"' --cfg 'feature="derive"' --cfg 'feature="extra-traits"' --cfg 'feature="fold"' --cfg 'feature="full"' --cfg 'feature="parsing"' --cfg 'feature="printing"' --cfg 'feature="proc-macro"' --cfg 'feature="quote"' --cfg 'feature="visit"' -C metadata=2371dd6cc96f3f46 -C extra-filename=-2371dd6cc96f3f46 --out-dir /opt/crater/target/debug/deps -L dependency=/opt/crater/target/debug/deps --extern proc_macro2=/opt/crater/target/debug/deps/libproc_macro2-7aff9d42ba8c1421.rmeta --extern quote=/opt/crater/target/debug/deps/libquote-14ad3d6c9f02db6f.rmeta --extern unicode_xid=/opt/crater/target/debug/deps/libunicode_xid-8d0f27a2dfe05cf6.rmeta --cap-lints allow --cap-lints=warn` (signal: 9, SIGKILL: kill) [INFO] [stderr] warning: build failed, waiting for other jobs to finish... [INFO] [stderr] warning[E0502]: cannot borrow `*self` as immutable because it is also borrowed as mutable [INFO] [stderr] --> /opt/crater/cargo-home/registry/src/github.com-1ecc6299db9ec823/nalgebra-0.17.2/src/base/cg.rs:297:44 [INFO] [stderr] | [INFO] [stderr] 297 | self[(j, i)] += shift[j] * self[(D::dim() - 1, i)]; [INFO] [stderr] | ---------------------------^^^^------------------- [INFO] [stderr] | | | [INFO] [stderr] | | immutable borrow occurs here [INFO] [stderr] | mutable borrow occurs here [INFO] [stderr] | mutable borrow later used here [INFO] [stderr] | [INFO] [stderr] = warning: this error has been downgraded to a warning for backwards compatibility with previous releases [INFO] [stderr] = warning: this represents potential undefined behavior in your code and this warning will become a hard error in the future [INFO] [stderr] = note: for more information, try `rustc --explain E0729` [INFO] [stderr] [INFO] [stderr] error: build failed [INFO] running `"docker" "inspect" "fae9a70f02065024cd9cecbf4f3f7ed69174466508a6e4d511092b160fc91e15"` [INFO] running `"docker" "rm" "-f" "fae9a70f02065024cd9cecbf4f3f7ed69174466508a6e4d511092b160fc91e15"` [INFO] [stdout] fae9a70f02065024cd9cecbf4f3f7ed69174466508a6e4d511092b160fc91e15