[INFO] fetching crate arboreal 0.0.4...
[INFO] testing arboreal-0.0.4 against beta-2026-01-20 for beta-1.94-1
[INFO] extracting crate arboreal 0.0.4 into /workspace/builds/worker-6-tc2/source
[INFO] started tweaking crates.io crate arboreal 0.0.4
[INFO] finished tweaking crates.io crate arboreal 0.0.4
[INFO] tweaked toml for crates.io crate arboreal 0.0.4 written to /workspace/builds/worker-6-tc2/source/Cargo.toml
[INFO] validating manifest of crates.io crate arboreal 0.0.4 on toolchain beta-2026-01-20
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+beta-2026-01-20" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate crates.io crate arboreal 0.0.4 already has a lockfile, it will not be regenerated
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+beta-2026-01-20" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-tc2/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" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--user" "0:0" "--network" "none" "ghcr.io/rust-lang/crates-build-env/linux@sha256:98afbf2d16093dec2546ff8915fddc74e65664aa03fc460b3712b1c2c54a33e4" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2026-01-20" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 237d8b4569e5fa9146131b3acc9e44af62c2f1adc85e9490e283c9d3fb2ba1a4
[INFO] running `Command { std: "docker" "start" "-a" "237d8b4569e5fa9146131b3acc9e44af62c2f1adc85e9490e283c9d3fb2ba1a4", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "237d8b4569e5fa9146131b3acc9e44af62c2f1adc85e9490e283c9d3fb2ba1a4", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "237d8b4569e5fa9146131b3acc9e44af62c2f1adc85e9490e283c9d3fb2ba1a4", kill_on_drop: false }`
[INFO] [stdout] 237d8b4569e5fa9146131b3acc9e44af62c2f1adc85e9490e283c9d3fb2ba1a4
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-tc2/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" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=warn" "-e" "RUSTDOCFLAGS=--cap-lints=warn" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--user" "0:0" "--network" "none" "ghcr.io/rust-lang/crates-build-env/linux@sha256:98afbf2d16093dec2546ff8915fddc74e65664aa03fc460b3712b1c2c54a33e4" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2026-01-20" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 36afc4117919cd162909b554d407d947ffbcfc22fc8052f046e4c2e2a1f79b38
[INFO] running `Command { std: "docker" "start" "-a" "36afc4117919cd162909b554d407d947ffbcfc22fc8052f046e4c2e2a1f79b38", kill_on_drop: false }`
[INFO] [stderr]    Compiling proc-macro2 v1.0.95
[INFO] [stderr]    Compiling unicode-ident v1.0.18
[INFO] [stderr]    Compiling serde v1.0.219
[INFO] [stderr]    Compiling base64 v0.22.1
[INFO] [stderr]    Compiling fixed_deque v1.3.0
[INFO] [stderr]    Compiling quote v1.0.40
[INFO] [stderr]    Compiling syn v2.0.104
[INFO] [stderr]    Compiling serde_derive v1.0.219
[INFO] [stderr]    Compiling bitflags v2.9.1
[INFO] [stderr]    Compiling ron v0.10.1
[INFO] [stderr]    Compiling arboreal v0.0.4 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused import: `crate::graph_base::graph_ref`
[INFO] [stdout]  --> src/digraph/digraph_impl.rs:6:5
[INFO] [stdout]   |
[INFO] [stdout] 6 | use crate::graph_base::graph_ref;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: method `try_get_edge_vec` is never used
[INFO] [stdout]   --> src/graph_base/graph_components.rs:59:19
[INFO] [stdout]    |
[INFO] [stdout] 38 | impl<N: Nodal, E: DirEdge> GraphChange<N, E> {
[INFO] [stdout]    | -------------------------------------------- method in this implementation
[INFO] [stdout] ...
[INFO] [stdout] 59 |     pub(crate) fn try_get_edge_vec(&self) -> Result<Vec<E>, &'static str> {
[INFO] [stdout]    |                   ^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `check_node_degrees` is never used
[INFO] [stdout]   --> src/graph_base/graph_ref.rs:30:8
[INFO] [stdout]    |
[INFO] [stdout] 30 | pub fn check_node_degrees<N: Nodal, E: DirEdge>(edges: &Vec<E>, id: Id) -> (usize, usize) {
[INFO] [stdout]    |        ^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: methods `sink_node_ids`, `is_connected`, `is_terminable`, and `is_valid` are never used
[INFO] [stdout]    --> src/digraph/digraph_impl.rs:81:19
[INFO] [stdout]     |
[INFO] [stdout]  12 | impl<N: Nodal, E: DirEdge> DiGraph<N, E> {
[INFO] [stdout]     | ---------------------------------------- methods in this implementation
[INFO] [stdout] ...
[INFO] [stdout]  81 |     pub(super) fn sink_node_ids(&self) -> Vec<Id> {
[INFO] [stdout]     |                   ^^^^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout]  96 |     pub(super) fn is_connected(&self) -> bool {
[INFO] [stdout]     |                   ^^^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 104 |     pub(super) fn is_terminable(&self) -> bool {
[INFO] [stdout]     |                   ^^^^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 107 |     pub(super) fn is_valid(&self) -> bool {
[INFO] [stdout]     |                   ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 11.73s
[INFO] running `Command { std: "docker" "inspect" "36afc4117919cd162909b554d407d947ffbcfc22fc8052f046e4c2e2a1f79b38", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "36afc4117919cd162909b554d407d947ffbcfc22fc8052f046e4c2e2a1f79b38", kill_on_drop: false }`
[INFO] [stdout] 36afc4117919cd162909b554d407d947ffbcfc22fc8052f046e4c2e2a1f79b38
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-tc2/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" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=warn" "-e" "RUSTDOCFLAGS=--cap-lints=warn" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--user" "0:0" "--network" "none" "ghcr.io/rust-lang/crates-build-env/linux@sha256:98afbf2d16093dec2546ff8915fddc74e65664aa03fc460b3712b1c2c54a33e4" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2026-01-20" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 43c78c505f583775c3f8c1e94bb48576fd8f53073cf97a60d71972675806245c
[INFO] running `Command { std: "docker" "start" "-a" "43c78c505f583775c3f8c1e94bb48576fd8f53073cf97a60d71972675806245c", kill_on_drop: false }`
[INFO] [stderr]    Compiling arboreal v0.0.4 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused import: `crate::graph_base::graph_ref`
[INFO] [stdout]  --> src/digraph/digraph_impl.rs:6:5
[INFO] [stdout]   |
[INFO] [stdout] 6 | use crate::graph_base::graph_ref;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: method `try_get_edge_vec` is never used
[INFO] [stdout]   --> src/graph_base/graph_components.rs:59:19
[INFO] [stdout]    |
[INFO] [stdout] 38 | impl<N: Nodal, E: DirEdge> GraphChange<N, E> {
[INFO] [stdout]    | -------------------------------------------- method in this implementation
[INFO] [stdout] ...
[INFO] [stdout] 59 |     pub(crate) fn try_get_edge_vec(&self) -> Result<Vec<E>, &'static str> {
[INFO] [stdout]    |                   ^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `check_node_degrees` is never used
[INFO] [stdout]   --> src/graph_base/graph_ref.rs:30:8
[INFO] [stdout]    |
[INFO] [stdout] 30 | pub fn check_node_degrees<N: Nodal, E: DirEdge>(edges: &Vec<E>, id: Id) -> (usize, usize) {
[INFO] [stdout]    |        ^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: methods `sink_node_ids`, `is_connected`, `is_terminable`, and `is_valid` are never used
[INFO] [stdout]    --> src/digraph/digraph_impl.rs:81:19
[INFO] [stdout]     |
[INFO] [stdout]  12 | impl<N: Nodal, E: DirEdge> DiGraph<N, E> {
[INFO] [stdout]     | ---------------------------------------- methods in this implementation
[INFO] [stdout] ...
[INFO] [stdout]  81 |     pub(super) fn sink_node_ids(&self) -> Vec<Id> {
[INFO] [stdout]     |                   ^^^^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout]  96 |     pub(super) fn is_connected(&self) -> bool {
[INFO] [stdout]     |                   ^^^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 104 |     pub(super) fn is_terminable(&self) -> bool {
[INFO] [stdout]     |                   ^^^^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 107 |     pub(super) fn is_valid(&self) -> bool {
[INFO] [stdout]     |                   ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `crate::graph_base::graph_ref`
[INFO] [stdout]  --> src/digraph/digraph_impl.rs:6:5
[INFO] [stdout]   |
[INFO] [stdout] 6 | use crate::graph_base::graph_ref;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: method `try_get_edge_vec` is never used
[INFO] [stdout]   --> src/graph_base/graph_components.rs:59:19
[INFO] [stdout]    |
[INFO] [stdout] 38 | impl<N: Nodal, E: DirEdge> GraphChange<N, E> {
[INFO] [stdout]    | -------------------------------------------- method in this implementation
[INFO] [stdout] ...
[INFO] [stdout] 59 |     pub(crate) fn try_get_edge_vec(&self) -> Result<Vec<E>, &'static str> {
[INFO] [stdout]    |                   ^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `check_node_degrees` is never used
[INFO] [stdout]   --> src/graph_base/graph_ref.rs:30:8
[INFO] [stdout]    |
[INFO] [stdout] 30 | pub fn check_node_degrees<N: Nodal, E: DirEdge>(edges: &Vec<E>, id: Id) -> (usize, usize) {
[INFO] [stdout]    |        ^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: methods `sink_node_ids`, `is_connected`, `is_terminable`, and `is_valid` are never used
[INFO] [stdout]    --> src/digraph/digraph_impl.rs:81:19
[INFO] [stdout]     |
[INFO] [stdout]  12 | impl<N: Nodal, E: DirEdge> DiGraph<N, E> {
[INFO] [stdout]     | ---------------------------------------- methods in this implementation
[INFO] [stdout] ...
[INFO] [stdout]  81 |     pub(super) fn sink_node_ids(&self) -> Vec<Id> {
[INFO] [stdout]     |                   ^^^^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout]  96 |     pub(super) fn is_connected(&self) -> bool {
[INFO] [stdout]     |                   ^^^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 104 |     pub(super) fn is_terminable(&self) -> bool {
[INFO] [stdout]     |                   ^^^^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 107 |     pub(super) fn is_valid(&self) -> bool {
[INFO] [stdout]     |                   ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `test` profile [unoptimized + debuginfo] target(s) in 1.14s
[INFO] running `Command { std: "docker" "inspect" "43c78c505f583775c3f8c1e94bb48576fd8f53073cf97a60d71972675806245c", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "43c78c505f583775c3f8c1e94bb48576fd8f53073cf97a60d71972675806245c", kill_on_drop: false }`
[INFO] [stdout] 43c78c505f583775c3f8c1e94bb48576fd8f53073cf97a60d71972675806245c
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-tc2/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" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=warn" "-e" "RUSTDOCFLAGS=--cap-lints=warn" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--user" "0:0" "--network" "none" "ghcr.io/rust-lang/crates-build-env/linux@sha256:98afbf2d16093dec2546ff8915fddc74e65664aa03fc460b3712b1c2c54a33e4" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2026-01-20" "test" "--frozen", kill_on_drop: false }`
[INFO] [stdout] 30348e62ac79e39f14d2e5d7fc03936dddb9589ef75edf1ef7a8440cdd1bdcab
[INFO] running `Command { std: "docker" "start" "-a" "30348e62ac79e39f14d2e5d7fc03936dddb9589ef75edf1ef7a8440cdd1bdcab", kill_on_drop: false }`
[INFO] [stderr] warning: unused import: `crate::graph_base::graph_ref`
[INFO] [stderr]  --> src/digraph/digraph_impl.rs:6:5
[INFO] [stderr]   |
[INFO] [stderr] 6 | use crate::graph_base::graph_ref;
[INFO] [stderr]   |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: `#[warn(unused_imports)]` (part of `#[warn(unused)]`) on by default
[INFO] [stderr] 
[INFO] [stderr] warning: method `try_get_edge_vec` is never used
[INFO] [stderr]   --> src/graph_base/graph_components.rs:59:19
[INFO] [stderr]    |
[INFO] [stderr] 38 | impl<N: Nodal, E: DirEdge> GraphChange<N, E> {
[INFO] [stderr]    | -------------------------------------------- method in this implementation
[INFO] [stderr] ...
[INFO] [stderr] 59 |     pub(crate) fn try_get_edge_vec(&self) -> Result<Vec<E>, &'static str> {
[INFO] [stderr]    |                   ^^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stderr] 
[INFO] [stderr] warning: function `check_node_degrees` is never used
[INFO] [stderr]   --> src/graph_base/graph_ref.rs:30:8
[INFO] [stderr]    |
[INFO] [stderr] 30 | pub fn check_node_degrees<N: Nodal, E: DirEdge>(edges: &Vec<E>, id: Id) -> (usize, usize) {
[INFO] [stderr]    |        ^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: methods `sink_node_ids`, `is_connected`, `is_terminable`, and `is_valid` are never used
[INFO] [stderr]    --> src/digraph/digraph_impl.rs:81:19
[INFO] [stderr]     |
[INFO] [stderr]  12 | impl<N: Nodal, E: DirEdge> DiGraph<N, E> {
[INFO] [stderr]     | ---------------------------------------- methods in this implementation
[INFO] [stderr] ...
[INFO] [stderr]  81 |     pub(super) fn sink_node_ids(&self) -> Vec<Id> {
[INFO] [stderr]     |                   ^^^^^^^^^^^^^
[INFO] [stderr] ...
[INFO] [stderr]  96 |     pub(super) fn is_connected(&self) -> bool {
[INFO] [stderr]     |                   ^^^^^^^^^^^^
[INFO] [stderr] ...
[INFO] [stderr] 104 |     pub(super) fn is_terminable(&self) -> bool {
[INFO] [stderr]     |                   ^^^^^^^^^^^^^
[INFO] [stderr] ...
[INFO] [stderr] 107 |     pub(super) fn is_valid(&self) -> bool {
[INFO] [stderr]     |                   ^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: `arboreal` (lib) generated 4 warnings (run `cargo fix --lib -p arboreal` to apply 1 suggestion)
[INFO] [stderr] warning: `arboreal` (lib test) generated 4 warnings (4 duplicates)
[INFO] [stderr]     Finished `test` profile [unoptimized + debuginfo] target(s) in 0.09s
[INFO] [stderr]      Running unittests src/lib.rs (/opt/rustwide/target/debug/deps/arboreal-5ac0d21092184c10)
[INFO] [stdout] 
[INFO] [stdout] running 3 tests
[INFO] [stdout] test demos::demo_extend_graph ... ignored, run to show usage with adding and removing nodes/edges
[INFO] [stdout] test tests::test_valid ... ok
[INFO] [stdout] test tests::test_auto_edge_drop ... FAILED
[INFO] [stdout] 
[INFO] [stdout] failures:
[INFO] [stdout] 
[INFO] [stdout] ---- tests::test_auto_edge_drop stdout ----
[INFO] [stdout] Default object for example Node/Edge structs:
[INFO] [stdout] DiGraph
[INFO] [stdout] 	Node Ids: []
[INFO] [stdout] 	(No edges)
[INFO] [stdout] 
[INFO] [stdout] DiGraph
[INFO] [stdout] 	Node Ids: [1, 2, 3, 4, 5, 6, 7, 8]
[INFO] [stdout] 	1->2,  1->3,  2->8,  3->5
[INFO] [stdout] 	3->7,  4->3,  5->6,  6->7
[INFO] [stdout] 	8->4
[INFO] [stdout] Unreachable from id 1: []
[INFO] [stdout] Unreachable from id 2: [1]
[INFO] [stdout] Unreachable from id 3: [1, 2, 4, 8]
[INFO] [stdout] Unreachable from id 42: [1, 2, 3, 4, 5, 6, 7, 8]
[INFO] [stdout] (Note that the id is not required to be valid)
[INFO] [stdout] 
[INFO] [stdout] thread 'tests::test_auto_edge_drop' (24) panicked at src/lib.rs:65:45:
[INFO] [stdout] called `Result::unwrap()` on an `Err` value: Io("Read-only file system (os error 30)")
[INFO] [stdout] stack backtrace:
[INFO] [stdout]    0:     0x61a5006e9d22 - std::backtrace_rs::backtrace::libunwind::trace::hf0bd46b30bc61685
[INFO] [stdout]                                at /rustc/9b1f8ff42d110b0ca138116745be921df5dc97e7/library/std/src/../../backtrace/src/backtrace/libunwind.rs:117:9
[INFO] [stdout]    1:     0x61a5006e9d22 - std::backtrace_rs::backtrace::trace_unsynchronized::h1d1fbb72ad89d7b7
[INFO] [stdout]                                at /rustc/9b1f8ff42d110b0ca138116745be921df5dc97e7/library/std/src/../../backtrace/src/backtrace/mod.rs:66:14
[INFO] [stdout]    2:     0x61a5006e9d22 - std::sys::backtrace::_print_fmt::he38b6f68ca847f47
[INFO] [stdout]                                at /rustc/9b1f8ff42d110b0ca138116745be921df5dc97e7/library/std/src/sys/backtrace.rs:74:9
[INFO] [stdout]    3:     0x61a5006e9d22 - <std::sys::backtrace::BacktraceLock::print::DisplayBacktrace as core::fmt::Display>::fmt::hb7e843cde1bc81a3
[INFO] [stdout]                                at /rustc/9b1f8ff42d110b0ca138116745be921df5dc97e7/library/std/src/sys/backtrace.rs:44:26
[INFO] [stdout]    4:     0x61a5006faf0a - core::fmt::rt::Argument::fmt::hc1dd77ac64f2688c
[INFO] [stdout]                                at /rustc/9b1f8ff42d110b0ca138116745be921df5dc97e7/library/core/src/fmt/rt.rs:152:76
[INFO] [stdout]    5:     0x61a5006faf0a - core::fmt::write::h952c506e2dbe9cff
[INFO] [stdout]    6:     0x61a5006b8b16 - std::io::default_write_fmt::hd23bd8145c03a23a
[INFO] [stdout]                                at /rustc/9b1f8ff42d110b0ca138116745be921df5dc97e7/library/std/src/io/mod.rs:639:11
[INFO] [stdout]    7:     0x61a5006b8b16 - std::io::Write::write_fmt::hdd3314a2bd8a34bd
[INFO] [stdout]                                at /rustc/9b1f8ff42d110b0ca138116745be921df5dc97e7/library/std/src/io/mod.rs:1994:13
[INFO] [stdout]    8:     0x61a5006c91d9 - std::sys::backtrace::BacktraceLock::print::h1079b82381c2c252
[INFO] [stdout]                                at /rustc/9b1f8ff42d110b0ca138116745be921df5dc97e7/library/std/src/sys/backtrace.rs:47:9
[INFO] [stdout]    9:     0x61a5006c91d9 - std::panicking::default_hook::{{closure}}::h85cb76b8462c00f2
[INFO] [stdout]                                at /rustc/9b1f8ff42d110b0ca138116745be921df5dc97e7/library/std/src/panicking.rs:292:27
[INFO] [stdout]   10:     0x61a5006c9071 - std::panicking::default_hook::h0134d220cc034c02
[INFO] [stdout]                                at /rustc/9b1f8ff42d110b0ca138116745be921df5dc97e7/library/std/src/panicking.rs:316:9
[INFO] [stdout]   11:     0x61a500657e5e - <alloc::boxed::Box<F,A> as core::ops::function::Fn<Args>>::call::hb2e68dca3970e3ca
[INFO] [stdout]                                at /rustc/9b1f8ff42d110b0ca138116745be921df5dc97e7/library/alloc/src/boxed.rs:2220:9
[INFO] [stdout]   12:     0x61a500657e5e - test::test_main_with_exit_callback::{{closure}}::ha7ec2063a2565ec3
[INFO] [stdout]                                at /rustc/9b1f8ff42d110b0ca138116745be921df5dc97e7/library/test/src/lib.rs:145:21
[INFO] [stdout]   13:     0x61a5006c9452 - <alloc::boxed::Box<F,A> as core::ops::function::Fn<Args>>::call::haebee478d0f56cf4
[INFO] [stdout]                                at /rustc/9b1f8ff42d110b0ca138116745be921df5dc97e7/library/alloc/src/boxed.rs:2220:9
[INFO] [stdout]   14:     0x61a5006c9452 - std::panicking::panic_with_hook::h8119b6db1fef734f
[INFO] [stdout]                                at /rustc/9b1f8ff42d110b0ca138116745be921df5dc97e7/library/std/src/panicking.rs:833:13
[INFO] [stdout]   15:     0x61a5006c9298 - std::panicking::panic_handler::{{closure}}::h24f5360b91482c0e
[INFO] [stdout]                                at /rustc/9b1f8ff42d110b0ca138116745be921df5dc97e7/library/std/src/panicking.rs:698:13
[INFO] [stdout]   16:     0x61a5006c4829 - std::sys::backtrace::__rust_end_short_backtrace::h4e60c5cbd1bd0108
[INFO] [stdout]                                at /rustc/9b1f8ff42d110b0ca138116745be921df5dc97e7/library/std/src/sys/backtrace.rs:182:18
[INFO] [stdout]   17:     0x61a5006ad70d - __rustc[e4c6931bd8050421]::rust_begin_unwind
[INFO] [stdout]                                at /rustc/9b1f8ff42d110b0ca138116745be921df5dc97e7/library/std/src/panicking.rs:689:5
[INFO] [stdout]   18:     0x61a50070439c - core::panicking::panic_fmt::hb1614a3ff6840071
[INFO] [stdout]                                at /rustc/9b1f8ff42d110b0ca138116745be921df5dc97e7/library/core/src/panicking.rs:80:14
[INFO] [stdout]   19:     0x61a5007038f2 - core::result::unwrap_failed::h7d4c34940aded59c
[INFO] [stdout]                                at /rustc/9b1f8ff42d110b0ca138116745be921df5dc97e7/library/core/src/result.rs:1867:5
[INFO] [stdout]   20:     0x61a50060c538 - core::result::Result<T,E>::unwrap::hdad47382f13fc4f6
[INFO] [stdout]                                at /rustc/9b1f8ff42d110b0ca138116745be921df5dc97e7/library/core/src/result.rs:1233:23
[INFO] [stdout]   21:     0x61a50060c538 - arboreal::tests::test_auto_edge_drop::hbb97853db23b7a8d
[INFO] [stdout]                                at /opt/rustwide/workdir/src/lib.rs:65:45
[INFO] [stdout]   22:     0x61a50060ca57 - arboreal::tests::test_auto_edge_drop::{{closure}}::h281e858c302d24c4
[INFO] [stdout]                                at /opt/rustwide/workdir/src/lib.rs:50:29
[INFO] [stdout]   23:     0x61a50060f436 - core::ops::function::FnOnce::call_once::hb4a94612a7d3fc6c
[INFO] [stdout]                                at /rustc/9b1f8ff42d110b0ca138116745be921df5dc97e7/library/core/src/ops/function.rs:250:5
[INFO] [stdout]   24:     0x61a500657c5b - core::ops::function::FnOnce::call_once::hefaf63600cd43d2a
[INFO] [stdout]                                at /rustc/9b1f8ff42d110b0ca138116745be921df5dc97e7/library/core/src/ops/function.rs:250:5
[INFO] [stdout]   25:     0x61a500657c5b - test::__rust_begin_short_backtrace::he30322a73a0e9ea6
[INFO] [stdout]                                at /rustc/9b1f8ff42d110b0ca138116745be921df5dc97e7/library/test/src/lib.rs:663:18
[INFO] [stdout]   26:     0x61a50066b62a - test::run_test_in_process::{{closure}}::hdea3ab8d0243ef36
[INFO] [stdout]                                at /rustc/9b1f8ff42d110b0ca138116745be921df5dc97e7/library/test/src/lib.rs:686:74
[INFO] [stdout]   27:     0x61a50066b62a - <core::panic::unwind_safe::AssertUnwindSafe<F> as core::ops::function::FnOnce<()>>::call_once::h66d192f42498ffce
[INFO] [stdout]                                at /rustc/9b1f8ff42d110b0ca138116745be921df5dc97e7/library/core/src/panic/unwind_safe.rs:274:9
[INFO] [stdout]   28:     0x61a50066b62a - std::panicking::catch_unwind::do_call::h822e18e8d3a6bb65
[INFO] [stdout]                                at /rustc/9b1f8ff42d110b0ca138116745be921df5dc97e7/library/std/src/panicking.rs:581:40
[INFO] [stdout]   29:     0x61a50066b62a - std::panicking::catch_unwind::h54b1de7ceab578bf
[INFO] [stdout]                                at /rustc/9b1f8ff42d110b0ca138116745be921df5dc97e7/library/std/src/panicking.rs:544:19
[INFO] [stdout]   30:     0x61a50066b62a - std::panic::catch_unwind::h60c29b7a9d0246b1
[INFO] [stdout]                                at /rustc/9b1f8ff42d110b0ca138116745be921df5dc97e7/library/std/src/panic.rs:359:14
[INFO] [stdout]   31:     0x61a50066b62a - test::run_test_in_process::h6099b5f871379b13
[INFO] [stdout]                                at /rustc/9b1f8ff42d110b0ca138116745be921df5dc97e7/library/test/src/lib.rs:686:27
[INFO] [stdout]   32:     0x61a50066b62a - test::run_test::{{closure}}::h926ce0a38281a4c8
[INFO] [stdout]                                at /rustc/9b1f8ff42d110b0ca138116745be921df5dc97e7/library/test/src/lib.rs:607:43
[INFO] [stdout]   33:     0x61a500645a84 - test::run_test::{{closure}}::h508de21a9afc7140
[INFO] [stdout]                                at /rustc/9b1f8ff42d110b0ca138116745be921df5dc97e7/library/test/src/lib.rs:637:41
[INFO] [stdout]   34:     0x61a500645a84 - std::sys::backtrace::__rust_begin_short_backtrace::h6e2f5c39ca00735a
[INFO] [stdout]                                at /rustc/9b1f8ff42d110b0ca138116745be921df5dc97e7/library/std/src/sys/backtrace.rs:166:18
[INFO] [stdout]   35:     0x61a500649342 - std::thread::lifecycle::spawn_unchecked::{{closure}}::{{closure}}::h133e44f0e5802c14
[INFO] [stdout]                                at /rustc/9b1f8ff42d110b0ca138116745be921df5dc97e7/library/std/src/thread/lifecycle.rs:91:13
[INFO] [stdout]   36:     0x61a500649342 - <core::panic::unwind_safe::AssertUnwindSafe<F> as core::ops::function::FnOnce<()>>::call_once::h4718c1285283955c
[INFO] [stdout]                                at /rustc/9b1f8ff42d110b0ca138116745be921df5dc97e7/library/core/src/panic/unwind_safe.rs:274:9
[INFO] [stdout]   37:     0x61a500649342 - std::panicking::catch_unwind::do_call::h0bba3937b4892238
[INFO] [stdout]                                at /rustc/9b1f8ff42d110b0ca138116745be921df5dc97e7/library/std/src/panicking.rs:581:40
[INFO] [stdout]   38:     0x61a500649342 - std::panicking::catch_unwind::h5b31cab5fb8c5d7f
[INFO] [stdout]                                at /rustc/9b1f8ff42d110b0ca138116745be921df5dc97e7/library/std/src/panicking.rs:544:19
[INFO] [stdout]   39:     0x61a500649342 - std::panic::catch_unwind::hb2fa05d52ed0124e
[INFO] [stdout]                                at /rustc/9b1f8ff42d110b0ca138116745be921df5dc97e7/library/std/src/panic.rs:359:14
[INFO] [stdout]   40:     0x61a500649342 - std::thread::lifecycle::spawn_unchecked::{{closure}}::hf401cf5ff501bd29
[INFO] [stdout]                                at /rustc/9b1f8ff42d110b0ca138116745be921df5dc97e7/library/std/src/thread/lifecycle.rs:89:26
[INFO] [stdout]   41:     0x61a500649342 - core::ops::function::FnOnce::call_once{{vtable.shim}}::h160022e94ce3b0bb
[INFO] [stdout]                                at /rustc/9b1f8ff42d110b0ca138116745be921df5dc97e7/library/core/src/ops/function.rs:250:5
[INFO] [stdout]   42:     0x61a5006bfa0f - <alloc::boxed::Box<F,A> as core::ops::function::FnOnce<Args>>::call_once::hf234e0d1d1d272ba
[INFO] [stdout]                                at /rustc/9b1f8ff42d110b0ca138116745be921df5dc97e7/library/alloc/src/boxed.rs:2206:9
[INFO] [stdout]   43:     0x61a5006bfa0f - std::sys::thread::unix::Thread::new::thread_start::h106a295241840d3b
[INFO] [stdout]                                at /rustc/9b1f8ff42d110b0ca138116745be921df5dc97e7/library/std/src/sys/thread/unix.rs:127:17
[INFO] [stdout]   44:     0x7430123a7aa4 - <unknown>
[INFO] [stdout]   45:     0x743012434a64 - clone
[INFO] [stdout]   46:                0x0 - <unknown>
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] failures:
[INFO] [stdout]     tests::test_auto_edge_drop
[INFO] [stdout] 
[INFO] [stdout] test result: FAILED. 1 passed; 1 failed; 1 ignored; 0 measured; 0 filtered out; finished in 0.02s
[INFO] [stdout] 
[INFO] [stderr] error: test failed, to rerun pass `--lib`
[INFO] running `Command { std: "docker" "inspect" "30348e62ac79e39f14d2e5d7fc03936dddb9589ef75edf1ef7a8440cdd1bdcab", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "30348e62ac79e39f14d2e5d7fc03936dddb9589ef75edf1ef7a8440cdd1bdcab", kill_on_drop: false }`
[INFO] [stdout] 30348e62ac79e39f14d2e5d7fc03936dddb9589ef75edf1ef7a8440cdd1bdcab
