[INFO] crate lib_xch 0.13.0 is already in cache
[INFO] extracting crate lib_xch 0.13.0 into work/ex/beta-1.38-1/sources/1.37.0/reg/lib_xch/0.13.0
[INFO] extracting crate lib_xch 0.13.0 into work/ex/beta-1.38-1/sources/beta-2019-08-13/reg/lib_xch/0.13.0
[INFO] validating manifest of lib_xch-0.13.0 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 lib_xch-0.13.0 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 lib_xch-0.13.0
[INFO] finished frobbing lib_xch-0.13.0
[INFO] frobbed toml for lib_xch-0.13.0 written to work/ex/beta-1.38-1/sources/1.37.0/reg/lib_xch/0.13.0/Cargo.toml
[INFO] started frobbing lib_xch-0.13.0
[INFO] finished frobbing lib_xch-0.13.0
[INFO] frobbed toml for lib_xch-0.13.0 written to work/ex/beta-1.38-1/sources/beta-2019-08-13/reg/lib_xch/0.13.0/Cargo.toml
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+1.37.0" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update"`
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+beta-2019-08-13" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update"`
[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 lib_xch-0.13.0 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-0/beta-2019-08-13:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.38-1/sources/beta-2019-08-13/reg/lib_xch/0.13.0:/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] 6a50d701fc93b4deb83e9ac57cdfecd4dbff2047ec0e2ddd233fa8ff8c52c6cb
[INFO] running `"docker" "start" "-a" "6a50d701fc93b4deb83e9ac57cdfecd4dbff2047ec0e2ddd233fa8ff8c52c6cb"`
[INFO] [stderr]    Compiling snowflake v1.3.0
[INFO] [stderr]    Compiling alga v0.7.2
[INFO] [stderr]    Compiling id_tree v1.5.0
[INFO] [stderr]    Compiling nalgebra v0.16.13
[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-0.16.13/src/base/cg.rs:291:44
[INFO] [stderr]     |
[INFO] [stderr] 291 |                 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]    Compiling lib_xch v0.13.0 (/opt/crater/workdir)
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 34.63s
[INFO] running `"docker" "inspect" "6a50d701fc93b4deb83e9ac57cdfecd4dbff2047ec0e2ddd233fa8ff8c52c6cb"`
[INFO] running `"docker" "rm" "-f" "6a50d701fc93b4deb83e9ac57cdfecd4dbff2047ec0e2ddd233fa8ff8c52c6cb"`
[INFO] [stdout] 6a50d701fc93b4deb83e9ac57cdfecd4dbff2047ec0e2ddd233fa8ff8c52c6cb
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.38-1/worker-0/beta-2019-08-13:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.38-1/sources/beta-2019-08-13/reg/lib_xch/0.13.0:/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" "test" "--frozen" "--no-run"`
[INFO] [stdout] ee305877bc9bd757b6ad3e25c08e1c54794ff525a25cf315fb5d98bb8a392c1f
[INFO] running `"docker" "start" "-a" "ee305877bc9bd757b6ad3e25c08e1c54794ff525a25cf315fb5d98bb8a392c1f"`
[INFO] [stderr]    Compiling lib_xch v0.13.0 (/opt/crater/workdir)
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 5.38s
[INFO] running `"docker" "inspect" "ee305877bc9bd757b6ad3e25c08e1c54794ff525a25cf315fb5d98bb8a392c1f"`
[INFO] running `"docker" "rm" "-f" "ee305877bc9bd757b6ad3e25c08e1c54794ff525a25cf315fb5d98bb8a392c1f"`
[INFO] [stdout] ee305877bc9bd757b6ad3e25c08e1c54794ff525a25cf315fb5d98bb8a392c1f
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.38-1/worker-0/beta-2019-08-13:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.38-1/sources/beta-2019-08-13/reg/lib_xch/0.13.0:/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" "test" "--frozen"`
[INFO] [stdout] 9922e75e08bb12474b7b1c9c1e58c9bc82e4c8cfa8b024e3dd2fe95dff73a1ca
[INFO] running `"docker" "start" "-a" "9922e75e08bb12474b7b1c9c1e58c9bc82e4c8cfa8b024e3dd2fe95dff73a1ca"`
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.06s
[INFO] [stderr]      Running /opt/crater/target/debug/deps/lib_xch-d4be46e2ae0cabf1
[INFO] [stdout] 
[INFO] [stdout] running 7 tests
[INFO] [stdout] test public::cell::tests::overflow_test_1 ... ok
[INFO] [stdout] test parser::atomdict::tests::mul_test ... ok
[INFO] [stdout] test public::cell::tests::overflow_test_3 ... ok
[INFO] [stdout] test parser::atomdict::tests::add_test ... ok
[INFO] [stdout] test public::cell::tests::overflow_test_4 ... ok
[INFO] [stdout] test public::cell::tests::overflow_test_2 ... ok
[INFO] [stdout] test parser::ast::treebuilder::tests::parse ... ok
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 7 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out
[INFO] [stdout] 
[INFO] [stderr]      Running /opt/crater/target/debug/deps/integrated_test-1506ba3f62076e4a
[INFO] [stdout] 
[INFO] [stdout] running 2 tests
[INFO] [stdout] test error ... ok
[INFO] [stdout] test solve ... ok
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 2 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out
[INFO] [stdout] 
[INFO] [stderr]    Doc-tests lib_xch
[INFO] [stdout] 
[INFO] [stdout] running 1 test
[INFO] [stdout] test src/lib.rs -  (line 27) ... ok
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 1 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out
[INFO] [stdout] 
[INFO] running `"docker" "inspect" "9922e75e08bb12474b7b1c9c1e58c9bc82e4c8cfa8b024e3dd2fe95dff73a1ca"`
[INFO] running `"docker" "rm" "-f" "9922e75e08bb12474b7b1c9c1e58c9bc82e4c8cfa8b024e3dd2fe95dff73a1ca"`
[INFO] [stdout] 9922e75e08bb12474b7b1c9c1e58c9bc82e4c8cfa8b024e3dd2fe95dff73a1ca