[INFO] fetching crate walrus 0.19.0...
[INFO] testing walrus-0.19.0 against try#ce59db7a1b1b012fb2793c4641c1bdecad7a128b for pr-85530
[INFO] extracting crate walrus 0.19.0 into /workspace/builds/worker-1/source
[INFO] validating manifest of crates.io crate walrus 0.19.0 on toolchain ce59db7a1b1b012fb2793c4641c1bdecad7a128b
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+ce59db7a1b1b012fb2793c4641c1bdecad7a128b" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate walrus 0.19.0
[INFO] finished tweaking crates.io crate walrus 0.19.0
[INFO] tweaked toml for crates.io crate walrus 0.19.0 written to /workspace/builds/worker-1/source/Cargo.toml
[INFO] crate crates.io crate walrus 0.19.0 already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+ce59db7a1b1b012fb2793c4641c1bdecad7a128b" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1/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@sha256:20528e8c29e4536546f0102ce88568b16ea7538393a33fcca951030f7af10457" "/opt/rustwide/cargo-home/bin/cargo" "+ce59db7a1b1b012fb2793c4641c1bdecad7a128b" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 087cfaafab1cd392d8c11bcdf361bb0cd8ad8d7a9ada7406b6e4af022a74583e
[INFO] running `Command { std: "docker" "start" "-a" "087cfaafab1cd392d8c11bcdf361bb0cd8ad8d7a9ada7406b6e4af022a74583e", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "087cfaafab1cd392d8c11bcdf361bb0cd8ad8d7a9ada7406b6e4af022a74583e", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "087cfaafab1cd392d8c11bcdf361bb0cd8ad8d7a9ada7406b6e4af022a74583e", kill_on_drop: false }`
[INFO] [stdout] 087cfaafab1cd392d8c11bcdf361bb0cd8ad8d7a9ada7406b6e4af022a74583e
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1/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" "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@sha256:20528e8c29e4536546f0102ce88568b16ea7538393a33fcca951030f7af10457" "/opt/rustwide/cargo-home/bin/cargo" "+ce59db7a1b1b012fb2793c4641c1bdecad7a128b" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 8b19b5e4460b2f192036edd1e9c60c7f031595d9e12f917b66fc5c5977b72524
[INFO] running `Command { std: "docker" "start" "-a" "8b19b5e4460b2f192036edd1e9c60c7f031595d9e12f917b66fc5c5977b72524", kill_on_drop: false }`
[INFO] [stderr]    Compiling proc-macro2 v1.0.24
[INFO] [stderr]    Compiling unicode-xid v0.2.1
[INFO] [stderr]    Compiling syn v1.0.67
[INFO] [stderr]    Compiling log v0.4.14
[INFO] [stderr]    Compiling cfg-if v1.0.0
[INFO] [stderr]    Compiling id-arena v2.2.1
[INFO] [stderr]    Compiling quote v1.0.9
[INFO] [stderr]    Compiling walrus-macro v0.19.0
[INFO] [stderr]    Compiling walrus v0.19.0 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 23.38s
[INFO] running `Command { std: "docker" "inspect" "8b19b5e4460b2f192036edd1e9c60c7f031595d9e12f917b66fc5c5977b72524", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "8b19b5e4460b2f192036edd1e9c60c7f031595d9e12f917b66fc5c5977b72524", kill_on_drop: false }`
[INFO] [stdout] 8b19b5e4460b2f192036edd1e9c60c7f031595d9e12f917b66fc5c5977b72524
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1/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" "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@sha256:20528e8c29e4536546f0102ce88568b16ea7538393a33fcca951030f7af10457" "/opt/rustwide/cargo-home/bin/cargo" "+ce59db7a1b1b012fb2793c4641c1bdecad7a128b" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 30b67dc3febb788788f3d6e6a3c51f6b599784efbda27bf38140077055ebd5ba
[INFO] running `Command { std: "docker" "start" "-a" "30b67dc3febb788788f3d6e6a3c51f6b599784efbda27bf38140077055ebd5ba", kill_on_drop: false }`
[INFO] [stderr]    Compiling memchr v2.3.4
[INFO] [stderr]    Compiling lazy_static v1.4.0
[INFO] [stderr]    Compiling serde v1.0.125
[INFO] [stderr]    Compiling libc v0.2.92
[INFO] [stderr]    Compiling byteorder v1.4.3
[INFO] [stderr]    Compiling bitflags v1.2.1
[INFO] [stderr]    Compiling regex-syntax v0.6.23
[INFO] [stderr]    Compiling plotters-backend v0.3.0
[INFO] [stderr]    Compiling unicode-width v0.1.8
[INFO] [stderr]    Compiling half v1.7.1
[INFO] [stderr]    Compiling oorandom v11.1.3
[INFO] [stderr]    Compiling termcolor v1.1.2
[INFO] [stderr]    Compiling humantime v2.1.0
[INFO] [stderr]    Compiling crossbeam-utils v0.8.3
[INFO] [stderr]    Compiling memoffset v0.6.3
[INFO] [stderr]    Compiling num-traits v0.2.14
[INFO] [stderr]    Compiling rayon v1.5.0
[INFO] [stderr]    Compiling itertools v0.9.0
[INFO] [stderr]    Compiling itertools v0.10.0
[INFO] [stderr]    Compiling cast v0.2.3
[INFO] [stderr]    Compiling serde_derive v1.0.125
[INFO] [stderr]    Compiling textwrap v0.11.0
[INFO] [stderr]    Compiling regex-automata v0.1.9
[INFO] [stderr]    Compiling plotters-svg v0.3.0
[INFO] [stderr]    Compiling clap v2.33.3
[INFO] [stderr]    Compiling crossbeam-epoch v0.9.3
[INFO] [stderr]    Compiling crossbeam-channel v0.5.0
[INFO] [stderr]    Compiling aho-corasick v0.7.15
[INFO] [stderr]    Compiling csv-core v0.1.10
[INFO] [stderr]    Compiling crossbeam-deque v0.8.0
[INFO] [stderr]    Compiling plotters v0.3.0
[INFO] [stderr]    Compiling criterion-plot v0.4.3
[INFO] [stderr]    Compiling num_cpus v1.13.0
[INFO] [stderr]    Compiling atty v0.2.14
[INFO] [stderr]    Compiling rayon-core v1.9.0
[INFO] [stderr]    Compiling regex v1.4.5
[INFO] [stderr]    Compiling env_logger v0.8.3
[INFO] [stderr]    Compiling serde_json v1.0.64
[INFO] [stderr]    Compiling bstr v0.2.15
[INFO] [stderr]    Compiling serde_cbor v0.11.1
[INFO] [stderr]    Compiling csv v1.1.6
[INFO] [stderr]    Compiling tinytemplate v1.2.1
[INFO] [stderr]    Compiling criterion v0.3.4
[INFO] [stderr]    Compiling walrus v0.19.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: field is never read: `good_boi`
[INFO] [stdout]    --> src/tombstone_arena.rs:199:9
[INFO] [stdout]     |
[INFO] [stdout] 199 |         good_boi: Option<Rc<()>>,
[INFO] [stdout]     |         ^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 40.14s
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] running `Command { std: "docker" "inspect" "30b67dc3febb788788f3d6e6a3c51f6b599784efbda27bf38140077055ebd5ba", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "30b67dc3febb788788f3d6e6a3c51f6b599784efbda27bf38140077055ebd5ba", kill_on_drop: false }`
[INFO] [stdout] 30b67dc3febb788788f3d6e6a3c51f6b599784efbda27bf38140077055ebd5ba
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1/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" "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@sha256:20528e8c29e4536546f0102ce88568b16ea7538393a33fcca951030f7af10457" "/opt/rustwide/cargo-home/bin/cargo" "+ce59db7a1b1b012fb2793c4641c1bdecad7a128b" "test" "--frozen", kill_on_drop: false }`
[INFO] [stdout] c7095308d949b30b89edac33b2f6be253cd202610bd19718258de12ee1c1d3f3
[INFO] running `Command { std: "docker" "start" "-a" "c7095308d949b30b89edac33b2f6be253cd202610bd19718258de12ee1c1d3f3", kill_on_drop: false }`
[INFO] [stdout] 
[INFO] [stderr] warning: field is never read: `good_boi`
[INFO] [stdout] running 13 tests
[INFO] [stderr]    --> src/tombstone_arena.rs:199:9
[INFO] [stdout] test ir::traversals::tests::dfs_in_order ... ok
[INFO] [stderr]     |
[INFO] [stdout] test ir::traversals::tests::dfs_pre_order_mut ... ok
[INFO] [stderr] 199 |         good_boi: Option<Rc<()>>,
[INFO] [stdout] test module::exports::tests::get_exported_global ... ok
[INFO] [stderr]     |         ^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] test module::exports::tests::get_exported_memory_should_return_none_for_unknown_memory_id ... ok
[INFO] [stderr]     |
[INFO] [stdout] test module::exports::tests::get_exported_table_should_return_none_for_unknown_table_id ... ok
[INFO] [stderr]     = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] test module::exports::tests::iter_mut_can_update_export_item ... ok
[INFO] [stderr] 
[INFO] [stdout] test tombstone_arena::tests::can_delete ... ok
[INFO] [stderr] warning: 1 warning emitted
[INFO] [stderr] 
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 0.07s
[INFO] [stderr]      Running unittests (/opt/rustwide/target/debug/deps/walrus-373172362f4bf5ad)
[INFO] [stdout] test module::exports::tests::get_exported_func_should_return_none_for_unknown_function_id ... ok
[INFO] [stderr]    Doc-tests walrus
[INFO] [stdout] test module::exports::tests::get_exported_func ... ok
[INFO] [stdout] test module::exports::tests::get_exported_table ... ok
[INFO] [stdout] test module::exports::tests::delete ... ok
[INFO] [stdout] test module::exports::tests::get_exported_global_should_return_none_for_unknown_global_id ... ok
[INFO] [stdout] test module::exports::tests::get_exported_memory ... ok
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 13 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.01s
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] running 14 tests
[INFO] [stdout] test src/ir/mod.rs - ir::Instr (line 222) ... ignored
[INFO] [stdout] test src/ir/mod.rs - ir::Instr (line 231) ... ignored
[INFO] [stdout] test src/ir/traversals.rs - ir::traversals::dfs_in_order (line 33) ... ok
[INFO] [stdout] test src/ir/traversals.rs - ir::traversals::dfs_pre_order_mut (line 155) ... ok
[INFO] [stdout] test src/function_builder.rs - function_builder::FunctionBuilder::instr_seq (line 71) ... ok
[INFO] [stdout] test src/function_builder.rs - function_builder::FunctionBuilder::finish (line 141) ... ok
[INFO] [stdout] test src/dot.rs - dot::Module::write_graphviz_dot (line 17) ... ok
[INFO] [stdout] test src/function_builder.rs - function_builder::InstrSeqBuilder::block_at (line 267) ... ok
[INFO] [stdout] test src/function_builder.rs - function_builder::InstrSeqBuilder::loop_at (line 340) ... ok
[INFO] [stdout] test src/function_builder.rs - function_builder::InstrSeqBuilder::if_else (line 380) ... ok
[INFO] [stdout] test src/function_builder.rs - function_builder::FunctionBuilder::dangling_instr_seq (line 110) ... ok
[INFO] [stdout] test src/function_builder.rs - function_builder::InstrSeqBuilder::block (line 234) ... ok
[INFO] [stdout] test src/function_builder.rs - function_builder::InstrSeqBuilder::loop_ (line 306) ... ok
[INFO] [stdout] test src/function_builder.rs - function_builder::InstrSeqBuilder::if_else_at (line 436) ... ok
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 12 passed; 0 failed; 2 ignored; 0 measured; 0 filtered out; finished in 2.56s
[INFO] [stdout] 
[INFO] running `Command { std: "docker" "inspect" "c7095308d949b30b89edac33b2f6be253cd202610bd19718258de12ee1c1d3f3", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "c7095308d949b30b89edac33b2f6be253cd202610bd19718258de12ee1c1d3f3", kill_on_drop: false }`
[INFO] [stdout] c7095308d949b30b89edac33b2f6be253cd202610bd19718258de12ee1c1d3f3