[INFO] fetching crate k2_tree 0.5.3...
[INFO] checking k2_tree-0.5.3 against master#f9515fdd5aa132e27d9b580a35b27f4b453251c1 for pr-125923
[INFO] extracting crate k2_tree 0.5.3 into /workspace/builds/worker-4-tc1/source
[INFO] validating manifest of crates.io crate k2_tree 0.5.3 on toolchain f9515fdd5aa132e27d9b580a35b27f4b453251c1
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+f9515fdd5aa132e27d9b580a35b27f4b453251c1" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate k2_tree 0.5.3
[INFO] finished tweaking crates.io crate k2_tree 0.5.3
[INFO] tweaked toml for crates.io crate k2_tree 0.5.3 written to /workspace/builds/worker-4-tc1/source/Cargo.toml
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+f9515fdd5aa132e27d9b580a35b27f4b453251c1" "generate-lockfile" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Updating crates.io index
[INFO] [stderr]      Locking 28 packages to latest compatible versions
[INFO] [stderr]       Adding bitvec v0.17.4 (latest: v1.0.1)
[INFO] [stderr]       Adding getrandom v0.1.16 (latest: v0.2.15)
[INFO] [stderr]       Adding hashbrown v0.12.3 (latest: v0.14.5)
[INFO] [stderr]       Adding indexmap v1.9.3 (latest: v2.2.6)
[INFO] [stderr]       Adding radium v0.3.0 (latest: v1.1.0)
[INFO] [stderr]       Adding rand v0.7.3 (latest: v0.8.5)
[INFO] [stderr]       Adding rand_chacha v0.2.2 (latest: v0.3.1)
[INFO] [stderr]       Adding rand_core v0.5.1 (latest: v0.6.4)
[INFO] [stderr]       Adding rand_hc v0.2.0 (latest: v0.3.2)
[INFO] [stderr]       Adding serde_yaml v0.8.26 (latest: v0.9.34+deprecated)
[INFO] [stderr]       Adding wasi v0.9.0+wasi-snapshot-preview1 (latest: v0.13.1+wasi-0.2.0)
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+f9515fdd5aa132e27d9b580a35b27f4b453251c1" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc1/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:dff56e7819e73ed36160586b3445e93eb0be776c16704aeeded9c3fb668b2384" "/opt/rustwide/cargo-home/bin/cargo" "+f9515fdd5aa132e27d9b580a35b27f4b453251c1" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] ad34e53b61fe3985dcc8b04ac16e6514b5dbe63a594c01ac5cf328c7a8764dc4
[INFO] running `Command { std: "docker" "start" "-a" "ad34e53b61fe3985dcc8b04ac16e6514b5dbe63a594c01ac5cf328c7a8764dc4", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "ad34e53b61fe3985dcc8b04ac16e6514b5dbe63a594c01ac5cf328c7a8764dc4", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "ad34e53b61fe3985dcc8b04ac16e6514b5dbe63a594c01ac5cf328c7a8764dc4", kill_on_drop: false }`
[INFO] [stdout] ad34e53b61fe3985dcc8b04ac16e6514b5dbe63a594c01ac5cf328c7a8764dc4
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc1/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=forbid" "-e" "RUSTDOCFLAGS=--cap-lints=forbid" "-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:dff56e7819e73ed36160586b3445e93eb0be776c16704aeeded9c3fb668b2384" "/opt/rustwide/cargo-home/bin/cargo" "+f9515fdd5aa132e27d9b580a35b27f4b453251c1" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] d41107a56491cc7791a7823e0a2d680f87eea8d648f548f56acd4e93e6a75e50
[INFO] running `Command { std: "docker" "start" "-a" "d41107a56491cc7791a7823e0a2d680f87eea8d648f548f56acd4e93e6a75e50", kill_on_drop: false }`
[INFO] [stderr]    Compiling proc-macro2 v1.0.85
[INFO] [stderr]     Checking radium v0.3.0
[INFO] [stderr]    Compiling indexmap v1.9.3
[INFO] [stderr]     Checking yaml-rust v0.4.5
[INFO] [stderr]     Checking getrandom v0.1.16
[INFO] [stderr]     Checking bitvec v0.17.4
[INFO] [stderr]     Checking rand_core v0.5.1
[INFO] [stderr]     Checking rand_chacha v0.2.2
[INFO] [stderr]     Checking rand v0.7.3
[INFO] [stderr]    Compiling quote v1.0.36
[INFO] [stderr]    Compiling syn v2.0.66
[INFO] [stderr]    Compiling serde_derive v1.0.203
[INFO] [stderr]     Checking serde v1.0.203
[INFO] [stderr]     Checking serde_json v1.0.117
[INFO] [stderr]     Checking serde_yaml v0.8.26
[INFO] [stderr]     Checking k2_tree v0.5.3 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused import: `datastore::*`
[INFO] [stdout]  --> src/tree/mod.rs:5:9
[INFO] [stdout]   |
[INFO] [stdout] 5 | pub use datastore::*;
[INFO] [stdout]   |         ^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr] error: rustc interrupted by SIGSEGV, printing backtrace
[INFO] [stderr] 
[INFO] [stderr] /opt/rustwide/rustup-home/toolchains/f9515fdd5aa132e27d9b580a35b27f4b453251c1/lib/librustc_driver-c4481479e8254e52.so(+0x32d5606)[0x7ff5152d5606]
[INFO] [stderr] /lib/x86_64-linux-gnu/libc.so.6(+0x42520)[0x7ff511ced520]
[INFO] [stderr] /opt/rustwide/rustup-home/toolchains/f9515fdd5aa132e27d9b580a35b27f4b453251c1/lib/librustc_driver-c4481479e8254e52.so(_RNvXsm_NtCs16s5l2Cc5a2_12rustc_expand6expandNtB5_19InvocationCollectorNtNtCs3hFdGzGgBx4_9rustc_ast9mut_visit10MutVisitor10visit_expr+0x95)[0x7ff516e058d5]
[INFO] [stderr] 
[INFO] [stderr] ### cycle encountered after 3 frames with period 4
[INFO] [stderr] /opt/rustwide/rustup-home/toolchains/f9515fdd5aa132e27d9b580a35b27f4b453251c1/lib/librustc_driver-c4481479e8254e52.so(+0x4e06382)[0x7ff516e06382]
[INFO] [stderr] /opt/rustwide/rustup-home/toolchains/f9515fdd5aa132e27d9b580a35b27f4b453251c1/lib/librustc_driver-c4481479e8254e52.so(_RNvXsm_NtCs16s5l2Cc5a2_12rustc_expand6expandNtB5_19InvocationCollectorNtNtCs3hFdGzGgBx4_9rustc_ast9mut_visit10MutVisitor10visit_expr+0x9a)[0x7ff516e058da]
[INFO] [stderr] /opt/rustwide/rustup-home/toolchains/f9515fdd5aa132e27d9b580a35b27f4b453251c1/lib/librustc_driver-c4481479e8254e52.so(+0x4e06382)[0x7ff516e06382]
[INFO] [stderr] /opt/rustwide/rustup-home/toolchains/f9515fdd5aa132e27d9b580a35b27f4b453251c1/lib/librustc_driver-c4481479e8254e52.so(_RNvXsm_NtCs16s5l2Cc5a2_12rustc_expand6expandNtB5_19InvocationCollectorNtNtCs3hFdGzGgBx4_9rustc_ast9mut_visit10MutVisitor10visit_expr+0x9a)[0x7ff516e058da]
[INFO] [stderr] ### recursed 63 times
[INFO] [stderr] 
[INFO] [stderr] /opt/rustwide/rustup-home/toolchains/f9515fdd5aa132e27d9b580a35b27f4b453251c1/lib/librustc_driver-c4481479e8254e52.so(+0x4e06382)[0x7ff516e06382]
[INFO] [stderr] 
[INFO] [stderr] note: rustc unexpectedly overflowed its stack! this is a bug
[INFO] [stderr] note: maximum backtrace depth reached, frames may have been lost
[INFO] [stderr] note: we would appreciate a report at https://github.com/rust-lang/rust
[INFO] [stderr] help: you can increase rustc's stack size by setting RUST_MIN_STACK=16777216
[INFO] [stderr] error: could not compile `k2_tree` (lib test)
[INFO] [stderr] 
[INFO] [stderr] Caused by:
[INFO] [stderr]   process didn't exit successfully: `/opt/rustwide/rustup-home/toolchains/f9515fdd5aa132e27d9b580a35b27f4b453251c1/bin/rustc --crate-name k2_tree --edition=2018 src/lib.rs --error-format=json --json=diagnostic-rendered-ansi,artifacts,future-incompat --emit=dep-info,metadata -C embed-bitcode=no -C debuginfo=2 --test --check-cfg 'cfg(docsrs)' --check-cfg 'cfg(feature, values())' -C metadata=9f76fe1677f06096 -C extra-filename=-9f76fe1677f06096 --out-dir /opt/rustwide/target/debug/deps -L dependency=/opt/rustwide/target/debug/deps --extern bitvec=/opt/rustwide/target/debug/deps/libbitvec-152c54305ee3f916.rmeta --extern rand=/opt/rustwide/target/debug/deps/librand-ab6adf8f9adfacdf.rmeta --extern serde=/opt/rustwide/target/debug/deps/libserde-bfa6e5a769a19b08.rmeta --extern serde_json=/opt/rustwide/target/debug/deps/libserde_json-c1c17762d02d285d.rmeta --extern serde_yaml=/opt/rustwide/target/debug/deps/libserde_yaml-79099b13ebad86fa.rmeta --cap-lints=forbid` (signal: 11, SIGSEGV: invalid memory reference)
[INFO] running `Command { std: "docker" "inspect" "d41107a56491cc7791a7823e0a2d680f87eea8d648f548f56acd4e93e6a75e50", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "d41107a56491cc7791a7823e0a2d680f87eea8d648f548f56acd4e93e6a75e50", kill_on_drop: false }`
[INFO] [stdout] d41107a56491cc7791a7823e0a2d680f87eea8d648f548f56acd4e93e6a75e50