[INFO] fetching crate k2_tree 0.5.3...
[INFO] checking k2_tree-0.5.3 against master#506512391b1a75ae450d36c9420978402a91abcc for pr-125384
[INFO] extracting crate k2_tree 0.5.3 into /workspace/builds/worker-1-tc1/source
[INFO] validating manifest of crates.io crate k2_tree 0.5.3 on toolchain 506512391b1a75ae450d36c9420978402a91abcc
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+506512391b1a75ae450d36c9420978402a91abcc" "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-1-tc1/source/Cargo.toml
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+506512391b1a75ae450d36c9420978402a91abcc" "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" "+506512391b1a75ae450d36c9420978402a91abcc" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded yaml-rust v0.4.5
[INFO] [stderr]   Downloaded serde_yaml v0.8.26
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-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:beeedbb442662e57d416641ecc3200b38e573c25b057896194468d05594dd835" "/opt/rustwide/cargo-home/bin/cargo" "+506512391b1a75ae450d36c9420978402a91abcc" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] e7a354fc3c77f724a929af8df23b242d2d3c17a3e9af0e2926b76bebc2d2aee0
[INFO] running `Command { std: "docker" "start" "-a" "e7a354fc3c77f724a929af8df23b242d2d3c17a3e9af0e2926b76bebc2d2aee0", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "e7a354fc3c77f724a929af8df23b242d2d3c17a3e9af0e2926b76bebc2d2aee0", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "e7a354fc3c77f724a929af8df23b242d2d3c17a3e9af0e2926b76bebc2d2aee0", kill_on_drop: false }`
[INFO] [stdout] e7a354fc3c77f724a929af8df23b242d2d3c17a3e9af0e2926b76bebc2d2aee0
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-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:beeedbb442662e57d416641ecc3200b38e573c25b057896194468d05594dd835" "/opt/rustwide/cargo-home/bin/cargo" "+506512391b1a75ae450d36c9420978402a91abcc" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 1efb521ebb02ed88ca23fd4905a0d9a2ef3bc9cfaf5c62a1292227252940bbdd
[INFO] running `Command { std: "docker" "start" "-a" "1efb521ebb02ed88ca23fd4905a0d9a2ef3bc9cfaf5c62a1292227252940bbdd", kill_on_drop: false }`
[INFO] [stderr]    Compiling proc-macro2 v1.0.84
[INFO] [stderr]    Compiling unicode-ident v1.0.12
[INFO] [stderr]    Compiling libc v0.2.155
[INFO] [stderr]    Compiling serde v1.0.203
[INFO] [stderr]    Compiling getrandom v0.1.16
[INFO] [stderr]    Compiling autocfg v1.3.0
[INFO] [stderr]     Checking hashbrown v0.12.3
[INFO] [stderr]     Checking ppv-lite86 v0.2.17
[INFO] [stderr]    Compiling serde_json v1.0.117
[INFO] [stderr]     Checking radium v0.3.0
[INFO] [stderr]     Checking linked-hash-map v0.5.6
[INFO] [stderr]     Checking either v1.12.0
[INFO] [stderr]     Checking itoa v1.0.11
[INFO] [stderr]     Checking yaml-rust v0.4.5
[INFO] [stderr]    Compiling indexmap v1.9.3
[INFO] [stderr]     Checking bitvec v0.17.4
[INFO] [stderr]    Compiling quote v1.0.36
[INFO] [stderr]    Compiling syn v2.0.66
[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 serde_derive v1.0.203
[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/506512391b1a75ae450d36c9420978402a91abcc/lib/librustc_driver-937479a9c8b72905.so(+0x3106f96)[0x7f137bd06f96]
[INFO] [stderr] /lib/x86_64-linux-gnu/libc.so.6(+0x42520)[0x7f13788f0520]
[INFO] [stderr] /opt/rustwide/rustup-home/toolchains/506512391b1a75ae450d36c9420978402a91abcc/lib/librustc_driver-937479a9c8b72905.so(+0x4b5a16d)[0x7f137d75a16d]
[INFO] [stderr] 
[INFO] [stderr] ### cycle encountered after 3 frames with period 4
[INFO] [stderr] /opt/rustwide/rustup-home/toolchains/506512391b1a75ae450d36c9420978402a91abcc/lib/librustc_driver-937479a9c8b72905.so(_RNvXsm_NtCs7ghUCcDB8tn_12rustc_expand6expandNtB5_19InvocationCollectorNtNtCs9CgBdbZ9kej_9rustc_ast9mut_visit10MutVisitor10visit_expr+0x9a)[0x7f137d759830]
[INFO] [stderr] /opt/rustwide/rustup-home/toolchains/506512391b1a75ae450d36c9420978402a91abcc/lib/librustc_driver-937479a9c8b72905.so(+0x4b5a2de)[0x7f137d75a2de]
[INFO] [stderr] /opt/rustwide/rustup-home/toolchains/506512391b1a75ae450d36c9420978402a91abcc/lib/librustc_driver-937479a9c8b72905.so(_RNvXsm_NtCs7ghUCcDB8tn_12rustc_expand6expandNtB5_19InvocationCollectorNtNtCs9CgBdbZ9kej_9rustc_ast9mut_visit10MutVisitor10visit_expr+0x9a)[0x7f137d759830]
[INFO] [stderr] /opt/rustwide/rustup-home/toolchains/506512391b1a75ae450d36c9420978402a91abcc/lib/librustc_driver-937479a9c8b72905.so(+0x4b5a2de)[0x7f137d75a2de]
[INFO] [stderr] ### recursed 63 times
[INFO] [stderr] 
[INFO] [stderr] /opt/rustwide/rustup-home/toolchains/506512391b1a75ae450d36c9420978402a91abcc/lib/librustc_driver-937479a9c8b72905.so(_RNvXsm_NtCs7ghUCcDB8tn_12rustc_expand6expandNtB5_19InvocationCollectorNtNtCs9CgBdbZ9kej_9rustc_ast9mut_visit10MutVisitor10visit_expr+0x9a)[0x7f137d759830]
[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/506512391b1a75ae450d36c9420978402a91abcc/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=c2b8da79d9fc0905 -C extra-filename=-c2b8da79d9fc0905 --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-dc5933899f2741f2.rmeta --extern serde_json=/opt/rustwide/target/debug/deps/libserde_json-911517308fd5e2e6.rmeta --extern serde_yaml=/opt/rustwide/target/debug/deps/libserde_yaml-16f3f30c1c7951e4.rmeta --cap-lints=allow` (signal: 11, SIGSEGV: invalid memory reference)
[INFO] running `Command { std: "docker" "inspect" "1efb521ebb02ed88ca23fd4905a0d9a2ef3bc9cfaf5c62a1292227252940bbdd", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "1efb521ebb02ed88ca23fd4905a0d9a2ef3bc9cfaf5c62a1292227252940bbdd", kill_on_drop: false }`
[INFO] [stdout] 1efb521ebb02ed88ca23fd4905a0d9a2ef3bc9cfaf5c62a1292227252940bbdd