[INFO] updating cached repository https://github.com/knack-supply/curve-tracer
[INFO] running `"git" "-c" "credential.helper=" "-c" "credential.helper=/mnt/big/crater/work/cargo-home/bin/git-credential-null" "-c" "remote.origin.fetch=refs/heads/*:refs/heads/*" "fetch" "origin" "--force" "--prune"`
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] 286cca22606e8253aa6fec8a967d950d595c7406
[INFO] checking knack-supply/curve-tracer against try#b19afc12c4f781e95f168f2fdea339c972f14ae2 for pr-64327
[INFO] running `"git" "clone" "work/cache/git-repos/https%3A%2F%2Fgithub.com%2Fknack-supply%2Fcurve-tracer" "work/builds/worker-1/source"`
[INFO] [stderr] Cloning into 'work/builds/worker-1/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/knack-supply/curve-tracer on toolchain b19afc12c4f781e95f168f2fdea339c972f14ae2-alt
[INFO] running `"/mnt/big/crater/work/cargo-home/bin/cargo" "+b19afc12c4f781e95f168f2fdea339c972f14ae2-alt" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started tweaking git repo https://github.com/knack-supply/curve-tracer
[INFO] finished tweaking git repo https://github.com/knack-supply/curve-tracer
[INFO] tweaked toml for git repo https://github.com/knack-supply/curve-tracer written to work/builds/worker-1/source/Cargo.toml
[INFO] crate git repo https://github.com/knack-supply/curve-tracer already has a lockfile, it will not be regenerated
[INFO] running `"/mnt/big/crater/work/cargo-home/bin/cargo" "+b19afc12c4f781e95f168f2fdea339c972f14ae2-alt" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/builds/worker-1/target:/opt/rustwide/target:rw,Z" "-v" "/mnt/big/crater/work/builds/worker-1/source:/opt/rustwide/workdir:ro,Z" "-v" "/mnt/big/crater/work/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/mnt/big/crater/work/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "MAP_USER_ID=1000" "-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" "--network" "none" "rustops/crates-build-env" "/opt/rustwide/cargo-home/bin/cargo" "+b19afc12c4f781e95f168f2fdea339c972f14ae2-alt" "check" "--frozen" "--all" "--all-targets"`
[INFO] [stdout] da8a5adb99b7834f92b2739ce070e7647ec99ab5a486cc61ef8597cb1d9d6fd2
[INFO] running `"docker" "start" "-a" "da8a5adb99b7834f92b2739ce070e7647ec99ab5a486cc61ef8597cb1d9d6fd2"`
[INFO] [stderr]    Compiling cairo-rs v0.6.0
[INFO] [stderr]    Compiling cairo-sys-rs v0.8.0
[INFO] [stderr]    Compiling libloading v0.5.0
[INFO] [stderr]     Checking measure_time v0.6.0
[INFO] [stderr]     Checking crc32fast v1.2.0
[INFO] [stderr]     Checking glib-sys v0.8.0
[INFO] [stderr]    Compiling memchr v2.2.0
[INFO] [stderr]    Compiling toml v0.4.10
[INFO] [stderr]     Checking noisy_float v0.1.9
[INFO] [stderr]     Checking autodiff v0.1.5
[INFO] [stderr]    Compiling syn v0.15.27
[INFO] [stderr]    Compiling backtrace v0.3.14
[INFO] [stderr]    Compiling clap v2.32.0
[INFO] [stderr]    Compiling aho-corasick v0.6.10
[INFO] [stderr]    Compiling nom v4.2.2
[INFO] [stderr]     Checking libflate v0.1.20
[INFO] [stderr]     Checking rand v0.6.5
[INFO] [stderr]     Checking chrono v0.4.6
[INFO] [stderr]     Checking alga v0.8.2
[INFO] [stderr]     Checking csv-core v0.1.5
[INFO] [stderr]     Checking gobject-sys v0.8.0
[INFO] [stderr]    Compiling regex v1.1.2
[INFO] [stderr]    Compiling cexpr v0.3.4
[INFO] [stderr]     Checking csv v1.0.5
[INFO] [stderr]    Compiling winres v0.1.8
[INFO] [stderr]     Checking simplelog v0.5.3
[INFO] [stderr]    Compiling gdk-sys v0.8.0
[INFO] [stderr]     Checking gio-sys v0.8.0
[INFO] [stderr]     Checking glib v0.7.1
[INFO] [stderr]     Checking pango-sys v0.8.0
[INFO] [stderr]     Checking atk-sys v0.8.0
[INFO] [stderr]    Compiling clang-sys v0.26.4
[INFO] [stderr]    Compiling env_logger v0.6.0
[INFO] [stderr]    Compiling gtk-sys v0.8.0
[INFO] [stderr]    Compiling gdk v0.10.0
[INFO] [stderr]     Checking nalgebra v0.17.2
[INFO] [stderr]    Compiling gtk v0.6.0
[INFO] [stderr]     Checking gdk-pixbuf-sys v0.8.0
[INFO] [stderr]    Compiling synstructure v0.10.1
[INFO] [stderr]    Compiling relm-gen-widget v0.16.0
[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/rustwide/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=c2218adcc781c5a7 -C extra-filename=-c2218adcc781c5a7 --out-dir /opt/rustwide/target/debug/deps -L dependency=/opt/rustwide/target/debug/deps --extern proc_macro2=/opt/rustwide/target/debug/deps/libproc_macro2-d9e7e7768ce10ba6.rmeta --extern quote=/opt/rustwide/target/debug/deps/libquote-4a70d88bcfb849a4.rmeta --extern unicode_xid=/opt/rustwide/target/debug/deps/libunicode_xid-4998087d4053acf5.rmeta --cap-lints allow --cap-lints=forbid` (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/rustwide/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" "da8a5adb99b7834f92b2739ce070e7647ec99ab5a486cc61ef8597cb1d9d6fd2"`
[INFO] running `"docker" "rm" "-f" "da8a5adb99b7834f92b2739ce070e7647ec99ab5a486cc61ef8597cb1d9d6fd2"`
[INFO] [stdout] da8a5adb99b7834f92b2739ce070e7647ec99ab5a486cc61ef8597cb1d9d6fd2