[INFO] updating cached repository https://github.com/arnasjozonis/lz78
[INFO] running `"git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/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] 873537bb7077881db9baf4021864d7a785efaa24
[INFO] testing arnasjozonis/lz78 against try#41997647ba6a77908f6ef64401414feb00bccf16 for pr-71274
[INFO] running `"git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Farnasjozonis%2Flz78" "/workspace/builds/worker-4/source"`
[INFO] [stderr] Cloning into '/workspace/builds/worker-4/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/arnasjozonis/lz78 on toolchain 41997647ba6a77908f6ef64401414feb00bccf16
[INFO] running `"/workspace/cargo-home/bin/cargo" "+41997647ba6a77908f6ef64401414feb00bccf16" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started tweaking git repo https://github.com/arnasjozonis/lz78
[INFO] finished tweaking git repo https://github.com/arnasjozonis/lz78
[INFO] tweaked toml for git repo https://github.com/arnasjozonis/lz78 written to /workspace/builds/worker-4/source/Cargo.toml
[INFO] crate git repo https://github.com/arnasjozonis/lz78 already has a lockfile, it will not be regenerated
[INFO] running `"/workspace/cargo-home/bin/cargo" "+41997647ba6a77908f6ef64401414feb00bccf16" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] running `"docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/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" "+41997647ba6a77908f6ef64401414feb00bccf16" "build" "--frozen"`
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] [stdout] faa6498a6774ad60bb46a20da3f2be2ef327fdd51062fc0946be20f5c72823f2
[INFO] running `"docker" "start" "-a" "faa6498a6774ad60bb46a20da3f2be2ef327fdd51062fc0946be20f5c72823f2"`
[INFO] [stderr]    Compiling lz78 v0.1.0 (/opt/rustwide/workdir)
[INFO] [stderr] warning: cannot borrow `dict` as mutable because it is also borrowed as immutable
[INFO] [stderr]    --> src/main.rs:136:9
[INFO] [stderr]     |
[INFO] [stderr] 135 |         let parent = dict.nodes.get(current_node.parent_node).unwrap();
[INFO] [stderr]     |                      ---------- immutable borrow occurs here
[INFO] [stderr] 136 |         dict.add_node(current_node.value, parent.index);
[INFO] [stderr]     |         ^^^^ mutable borrow occurs here   ------------ immutable borrow later used here
[INFO] [stderr]     |
[INFO] [stderr]     = note: `#[warn(mutable_borrow_reservation_conflict)]` on by default
[INFO] [stderr]     = warning: this borrowing pattern was not meant to be accepted, and may become a hard error in the future
[INFO] [stderr]     = note: for more information, see issue #59159 <https://github.com/rust-lang/rust/issues/59159>
[INFO] [stderr] 
[INFO] [stderr] warning: cannot borrow `dict` as mutable because it is also borrowed as immutable
[INFO] [stderr]    --> src/main.rs:172:9
[INFO] [stderr]     |
[INFO] [stderr] 171 |         let parent = dict.nodes.get(current_node.parent_node).unwrap();
[INFO] [stderr]     |                      ---------- immutable borrow occurs here
[INFO] [stderr] 172 |         dict.add_node(current_node.value, parent.index);
[INFO] [stderr]     |         ^^^^ mutable borrow occurs here   ------------ immutable borrow later used here
[INFO] [stderr]     |
[INFO] [stderr]     = warning: this borrowing pattern was not meant to be accepted, and may become a hard error in the future
[INFO] [stderr]     = note: for more information, see issue #59159 <https://github.com/rust-lang/rust/issues/59159>
[INFO] [stderr] 
[INFO] [stderr] warning: 2 warnings emitted
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 1.51s
[INFO] running `"docker" "inspect" "faa6498a6774ad60bb46a20da3f2be2ef327fdd51062fc0946be20f5c72823f2"`
[INFO] running `"docker" "rm" "-f" "faa6498a6774ad60bb46a20da3f2be2ef327fdd51062fc0946be20f5c72823f2"`
[INFO] [stdout] faa6498a6774ad60bb46a20da3f2be2ef327fdd51062fc0946be20f5c72823f2
[INFO] running `"docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/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" "+41997647ba6a77908f6ef64401414feb00bccf16" "test" "--frozen" "--no-run"`
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] [stdout] f83828629393f6852ed7e6480981d667c4a9b00ad6277004817e902c8b104203
[INFO] running `"docker" "start" "-a" "f83828629393f6852ed7e6480981d667c4a9b00ad6277004817e902c8b104203"`
[INFO] [stderr]    Compiling lz78 v0.1.0 (/opt/rustwide/workdir)
[INFO] [stderr] warning: cannot borrow `dict` as mutable because it is also borrowed as immutable
[INFO] [stderr]    --> src/main.rs:136:9
[INFO] [stderr]     |
[INFO] [stderr] 135 |         let parent = dict.nodes.get(current_node.parent_node).unwrap();
[INFO] [stderr]     |                      ---------- immutable borrow occurs here
[INFO] [stderr] 136 |         dict.add_node(current_node.value, parent.index);
[INFO] [stderr]     |         ^^^^ mutable borrow occurs here   ------------ immutable borrow later used here
[INFO] [stderr]     |
[INFO] [stderr]     = note: `#[warn(mutable_borrow_reservation_conflict)]` on by default
[INFO] [stderr]     = warning: this borrowing pattern was not meant to be accepted, and may become a hard error in the future
[INFO] [stderr]     = note: for more information, see issue #59159 <https://github.com/rust-lang/rust/issues/59159>
[INFO] [stderr] 
[INFO] [stderr] warning: cannot borrow `dict` as mutable because it is also borrowed as immutable
[INFO] [stderr]    --> src/main.rs:172:9
[INFO] [stderr]     |
[INFO] [stderr] 171 |         let parent = dict.nodes.get(current_node.parent_node).unwrap();
[INFO] [stderr]     |                      ---------- immutable borrow occurs here
[INFO] [stderr] 172 |         dict.add_node(current_node.value, parent.index);
[INFO] [stderr]     |         ^^^^ mutable borrow occurs here   ------------ immutable borrow later used here
[INFO] [stderr]     |
[INFO] [stderr]     = warning: this borrowing pattern was not meant to be accepted, and may become a hard error in the future
[INFO] [stderr]     = note: for more information, see issue #59159 <https://github.com/rust-lang/rust/issues/59159>
[INFO] [stderr] 
[INFO] [stderr] warning: 2 warnings emitted
[INFO] [stderr] 
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 1.33s
[INFO] running `"docker" "inspect" "f83828629393f6852ed7e6480981d667c4a9b00ad6277004817e902c8b104203"`
[INFO] running `"docker" "rm" "-f" "f83828629393f6852ed7e6480981d667c4a9b00ad6277004817e902c8b104203"`
[INFO] [stdout] f83828629393f6852ed7e6480981d667c4a9b00ad6277004817e902c8b104203
[INFO] running `"docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/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" "+41997647ba6a77908f6ef64401414feb00bccf16" "test" "--frozen"`
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] [stdout] 00d3afbb146c33a53f92d0184093465b55f902e1399ad3111a8373dcb4380a5f
[INFO] running `"docker" "start" "-a" "00d3afbb146c33a53f92d0184093465b55f902e1399ad3111a8373dcb4380a5f"`
[INFO] [stderr] warning: cannot borrow `dict` as mutable because it is also borrowed as immutable
[INFO] [stderr]    --> src/main.rs:136:9
[INFO] [stderr]     |
[INFO] [stderr] 135 |         let parent = dict.nodes.get(current_node.parent_node).unwrap();
[INFO] [stderr]     |                      ---------- immutable borrow occurs here
[INFO] [stderr] 136 |         dict.add_node(current_node.value, parent.index);
[INFO] [stderr]     |         ^^^^ mutable borrow occurs here   ------------ immutable borrow later used here
[INFO] [stderr]     |
[INFO] [stderr]     = note: `#[warn(mutable_borrow_reservation_conflict)]` on by default
[INFO] [stderr]     = warning: this borrowing pattern was not meant to be accepted, and may become a hard error in the future
[INFO] [stderr]     = note: for more information, see issue #59159 <https://github.com/rust-lang/rust/issues/59159>
[INFO] [stderr] 
[INFO] [stderr] warning: cannot borrow `dict` as mutable because it is also borrowed as immutable
[INFO] [stderr]    --> src/main.rs:172:9
[INFO] [stderr]     |
[INFO] [stderr] 171 |         let parent = dict.nodes.get(current_node.parent_node).unwrap();
[INFO] [stderr]     |                      ---------- immutable borrow occurs here
[INFO] [stderr] 172 |         dict.add_node(current_node.value, parent.index);
[INFO] [stderr]     |         ^^^^ mutable borrow occurs here   ------------ immutable borrow later used here
[INFO] [stderr]     |
[INFO] [stderr]     = warning: this borrowing pattern was not meant to be accepted, and may become a hard error in the future
[INFO] [stderr]     = note: for more information, see issue #59159 <https://github.com/rust-lang/rust/issues/59159>
[INFO] [stderr] 
[INFO] [stderr] warning: 2 warnings emitted
[INFO] [stderr] 
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 0.07s
[INFO] [stderr]      Running /opt/rustwide/target/debug/deps/lz78-ad5953582cc4868f
[INFO] [stdout] 
[INFO] [stdout] running 2 tests
[INFO] [stdout] test tests::test_log2 ... ok
[INFO] [stdout] test tests::test_adding_node ... ok
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 2 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out
[INFO] [stdout] 
[INFO] running `"docker" "inspect" "00d3afbb146c33a53f92d0184093465b55f902e1399ad3111a8373dcb4380a5f"`
[INFO] running `"docker" "rm" "-f" "00d3afbb146c33a53f92d0184093465b55f902e1399ad3111a8373dcb4380a5f"`
[INFO] [stdout] 00d3afbb146c33a53f92d0184093465b55f902e1399ad3111a8373dcb4380a5f