[INFO] fetching crate dynagrad 0.4.1...
[INFO] checking dynagrad-0.4.1 against try#4662032ab74cd44d423120d08d251dfead4914a0 for pr-72788
[INFO] extracting crate dynagrad 0.4.1 into /workspace/builds/worker-6/source
[INFO] validating manifest of crates.io crate dynagrad 0.4.1 on toolchain 4662032ab74cd44d423120d08d251dfead4914a0
[INFO] running `"/workspace/cargo-home/bin/cargo" "+4662032ab74cd44d423120d08d251dfead4914a0" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started tweaking crates.io crate dynagrad 0.4.1
[INFO] finished tweaking crates.io crate dynagrad 0.4.1
[INFO] tweaked toml for crates.io crate dynagrad 0.4.1 written to /workspace/builds/worker-6/source/Cargo.toml
[INFO] crate crates.io crate dynagrad 0.4.1 already has a lockfile, it will not be regenerated
[INFO] running `"/workspace/cargo-home/bin/cargo" "+4662032ab74cd44d423120d08d251dfead4914a0" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] [stderr] warning: file found to be present in multiple build targets: /workspace/builds/worker-6/source/examples/simple.rs
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded gnuplot v0.0.32
[INFO] running `"docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6/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" "MAP_USER_ID=0" "-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" "+4662032ab74cd44d423120d08d251dfead4914a0" "check" "--frozen" "--all" "--all-targets"`
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] [stdout] 7e5e947b43c1bd9ced8cb50f2768989ac836edaa9ac63083adb624ba77ad7ab5
[INFO] running `"docker" "start" "-a" "7e5e947b43c1bd9ced8cb50f2768989ac836edaa9ac63083adb624ba77ad7ab5"`
[INFO] [stderr] sudo: setrlimit(RLIMIT_CORE): Operation not permitted
[INFO] [stderr] warning: file found to be present in multiple build targets: /opt/rustwide/workdir/examples/simple.rs
[INFO] [stderr]    Compiling matrixmultiply v0.1.15
[INFO] [stderr]     Checking rawpointer v0.1.0
[INFO] [stderr]     Checking either v1.5.2
[INFO] [stderr]    Compiling num-traits v0.2.8
[INFO] [stderr]    Compiling num-complex v0.2.3
[INFO] [stderr]     Checking gnuplot v0.0.32
[INFO] [stderr]     Checking itertools v0.7.11
[INFO] [stderr]     Checking ndarray v0.12.1
[INFO] [stderr]     Checking dynagrad v0.4.1 (/opt/rustwide/workdir)
[INFO] [stderr]     Checking ndarray-rand v0.9.0
[INFO] [stderr] error[E0599]: no function or associated item named `as_raw` found for struct `std::rc::Weak<_>` in the current scope
[INFO] [stderr]   --> src/core.rs:22:16
[INFO] [stderr]    |
[INFO] [stderr] 22 |         (Weak::as_raw(&p) as usize).hash(state);
[INFO] [stderr]    |                ^^^^^^ function or associated item not found in `std::rc::Weak<_>`
[INFO] [stderr] 
[INFO] [stderr] error: aborting due to previous error
[INFO] [stderr] 
[INFO] [stderr] For more information about this error, try `rustc --explain E0599`.
[INFO] [stderr] error: could not compile `dynagrad`.
[INFO] [stderr] 
[INFO] [stderr] To learn more, run the command again with --verbose.
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stderr] error[E0599]: no function or associated item named `as_raw` found for struct `std::rc::Weak<_>` in the current scope
[INFO] [stderr]   --> src/core.rs:22:16
[INFO] [stderr]    |
[INFO] [stderr] 22 |         (Weak::as_raw(&p) as usize).hash(state);
[INFO] [stderr]    |                ^^^^^^ function or associated item not found in `std::rc::Weak<_>`
[INFO] [stderr] 
[INFO] [stderr] error: aborting due to previous error
[INFO] [stderr] 
[INFO] [stderr] For more information about this error, try `rustc --explain E0599`.
[INFO] [stderr] error: build failed
[INFO] running `"docker" "inspect" "7e5e947b43c1bd9ced8cb50f2768989ac836edaa9ac63083adb624ba77ad7ab5"`
[INFO] running `"docker" "rm" "-f" "7e5e947b43c1bd9ced8cb50f2768989ac836edaa9ac63083adb624ba77ad7ab5"`
[INFO] [stdout] 7e5e947b43c1bd9ced8cb50f2768989ac836edaa9ac63083adb624ba77ad7ab5