[INFO] fetching crate k2_tree 0.5.3...
[INFO] checking k2_tree-0.5.3 against master#ff1737bb00913444173658b4e0b274fd79aabf66 for pr-132712-1
[INFO] extracting crate k2_tree 0.5.3 into /workspace/builds/worker-2-tc1/source
[INFO] validating manifest of crates.io crate k2_tree 0.5.3 on toolchain ff1737bb00913444173658b4e0b274fd79aabf66
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+ff1737bb00913444173658b4e0b274fd79aabf66" "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-2-tc1/source/Cargo.toml
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+ff1737bb00913444173658b4e0b274fd79aabf66" "generate-lockfile" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Updating crates.io index
[INFO] [stderr]      Locking 31 packages to latest compatible versions
[INFO] [stderr]       Adding bitvec v0.17.4 (available: v1.0.1)
[INFO] [stderr]       Adding rand v0.7.3 (available: v0.8.5)
[INFO] [stderr]       Adding serde_yaml v0.8.26 (available: v0.9.34+deprecated)
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+ff1737bb00913444173658b4e0b274fd79aabf66" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-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@sha256:4a844ea9eb2546a2d2c7022eacef16ef2e8229c7fbb2c7d4d55a9ceca922f72d" "/opt/rustwide/cargo-home/bin/cargo" "+ff1737bb00913444173658b4e0b274fd79aabf66" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 5b396e51208f4fc8a992446d6007b712813b8853fe9c1ff9ab819c6c48e325c7
[INFO] running `Command { std: "docker" "start" "-a" "5b396e51208f4fc8a992446d6007b712813b8853fe9c1ff9ab819c6c48e325c7", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "5b396e51208f4fc8a992446d6007b712813b8853fe9c1ff9ab819c6c48e325c7", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "5b396e51208f4fc8a992446d6007b712813b8853fe9c1ff9ab819c6c48e325c7", kill_on_drop: false }`
[INFO] [stdout] 5b396e51208f4fc8a992446d6007b712813b8853fe9c1ff9ab819c6c48e325c7
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-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=allow" "-e" "RUSTDOCFLAGS=--cap-lints=allow" "-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@sha256:4a844ea9eb2546a2d2c7022eacef16ef2e8229c7fbb2c7d4d55a9ceca922f72d" "/opt/rustwide/cargo-home/bin/cargo" "+ff1737bb00913444173658b4e0b274fd79aabf66" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] bc8e756b6a8c1ea010f14d005f407dea7b7f68e48a3e7926e52d246dfed6ef2a
[INFO] running `Command { std: "docker" "start" "-a" "bc8e756b6a8c1ea010f14d005f407dea7b7f68e48a3e7926e52d246dfed6ef2a", kill_on_drop: false }`
[INFO] [stderr]    Compiling syn v2.0.89
[INFO] [stderr]    Compiling libc v0.2.164
[INFO] [stderr]    Compiling getrandom v0.1.16
[INFO] [stderr]     Checking linked-hash-map v0.5.6
[INFO] [stderr]     Checking radium v0.3.0
[INFO] [stderr]     Checking hashbrown v0.12.3
[INFO] [stderr]    Compiling indexmap v1.9.3
[INFO] [stderr]     Checking yaml-rust v0.4.5
[INFO] [stderr]     Checking bitvec v0.17.4
[INFO] [stderr]     Checking rand_core v0.5.1
[INFO] [stderr]    Compiling serde_derive v1.0.215
[INFO] [stderr]    Compiling zerocopy-derive v0.7.35
[INFO] [stderr]     Checking zerocopy v0.7.35
[INFO] [stderr]     Checking ppv-lite86 v0.2.20
[INFO] [stderr]     Checking rand_chacha v0.2.2
[INFO] [stderr]     Checking rand v0.7.3
[INFO] [stderr]     Checking serde v1.0.215
[INFO] [stderr]     Checking serde_json v1.0.133
[INFO] [stderr]     Checking serde_yaml v0.8.26
[INFO] [stderr]     Checking k2_tree v0.5.3 (/opt/rustwide/workdir)
[INFO] [stderr] error: rustc interrupted by SIGSEGV, printing backtrace
[INFO] [stderr] 
[INFO] [stderr] /opt/rustwide/rustup-home/toolchains/ff1737bb00913444173658b4e0b274fd79aabf66/lib/librustc_driver-dfef7cfbddc1603e.so(+0x37554f3)[0x78b9d5b554f3]
[INFO] [stderr] /lib/x86_64-linux-gnu/libc.so.6(+0x42520)[0x78b9d9a90520]
[INFO] [stderr] /opt/rustwide/rustup-home/toolchains/ff1737bb00913444173658b4e0b274fd79aabf66/lib/librustc_driver-dfef7cfbddc1603e.so(_RNvXsm_NtCslxYssXU4TYF_12rustc_expand6expandNtB5_19InvocationCollectorNtNtCssnD1wl9Bs7_9rustc_ast9mut_visit10MutVisitor10visit_expr+0x91)[0x78b9d795b4d7]
[INFO] [stderr] 
[INFO] [stderr] ### cycle encountered after 3 frames with period 4
[INFO] [stderr] /opt/rustwide/rustup-home/toolchains/ff1737bb00913444173658b4e0b274fd79aabf66/lib/librustc_driver-dfef7cfbddc1603e.so(+0x555bfb3)[0x78b9d795bfb3]
[INFO] [stderr] /opt/rustwide/rustup-home/toolchains/ff1737bb00913444173658b4e0b274fd79aabf66/lib/librustc_driver-dfef7cfbddc1603e.so(_RNvXsm_NtCslxYssXU4TYF_12rustc_expand6expandNtB5_19InvocationCollectorNtNtCssnD1wl9Bs7_9rustc_ast9mut_visit10MutVisitor10visit_expr+0x96)[0x78b9d795b4dc]
[INFO] [stderr] /opt/rustwide/rustup-home/toolchains/ff1737bb00913444173658b4e0b274fd79aabf66/lib/librustc_driver-dfef7cfbddc1603e.so(+0x555bfb3)[0x78b9d795bfb3]
[INFO] [stderr] /opt/rustwide/rustup-home/toolchains/ff1737bb00913444173658b4e0b274fd79aabf66/lib/librustc_driver-dfef7cfbddc1603e.so(_RNvXsm_NtCslxYssXU4TYF_12rustc_expand6expandNtB5_19InvocationCollectorNtNtCssnD1wl9Bs7_9rustc_ast9mut_visit10MutVisitor10visit_expr+0x96)[0x78b9d795b4dc]
[INFO] [stderr] ### recursed 63 times
[INFO] [stderr] 
[INFO] [stderr] /opt/rustwide/rustup-home/toolchains/ff1737bb00913444173658b4e0b274fd79aabf66/lib/librustc_driver-dfef7cfbddc1603e.so(+0x555bfb3)[0x78b9d795bfb3]
[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/ff1737bb00913444173658b4e0b274fd79aabf66/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=521ab3978a922c6e -C extra-filename=-521ab3978a922c6e --out-dir /opt/rustwide/target/debug/deps -L dependency=/opt/rustwide/target/debug/deps --extern bitvec=/opt/rustwide/target/debug/deps/libbitvec-051b4eafbb9c5742.rmeta --extern rand=/opt/rustwide/target/debug/deps/librand-042036208dbb823c.rmeta --extern serde=/opt/rustwide/target/debug/deps/libserde-a38b0796d13e72f6.rmeta --extern serde_json=/opt/rustwide/target/debug/deps/libserde_json-d6055dcd9af512dd.rmeta --extern serde_yaml=/opt/rustwide/target/debug/deps/libserde_yaml-54246bfc686929c8.rmeta --cap-lints=allow` (signal: 11, SIGSEGV: invalid memory reference)
[INFO] running `Command { std: "docker" "inspect" "bc8e756b6a8c1ea010f14d005f407dea7b7f68e48a3e7926e52d246dfed6ef2a", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "bc8e756b6a8c1ea010f14d005f407dea7b7f68e48a3e7926e52d246dfed6ef2a", kill_on_drop: false }`
[INFO] [stdout] bc8e756b6a8c1ea010f14d005f407dea7b7f68e48a3e7926e52d246dfed6ef2a