[INFO] fetching crate serdo 0.1.6...
[INFO] testing serdo-0.1.6 against try#2440211fe03bc45c89b6dc1a3df18382ce91e32b for pr-146098-1
[INFO] extracting crate serdo 0.1.6 into /workspace/builds/worker-3-tc2/source
[INFO] started tweaking crates.io crate serdo 0.1.6
[INFO] finished tweaking crates.io crate serdo 0.1.6
[INFO] tweaked toml for crates.io crate serdo 0.1.6 written to /workspace/builds/worker-3-tc2/source/Cargo.toml
[INFO] validating manifest of crates.io crate serdo 0.1.6 on toolchain 2440211fe03bc45c89b6dc1a3df18382ce91e32b
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+2440211fe03bc45c89b6dc1a3df18382ce91e32b" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+2440211fe03bc45c89b6dc1a3df18382ce91e32b" "generate-lockfile" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Updating crates.io index
[INFO] [stderr]      Locking 72 packages to latest compatible versions
[INFO] [stderr]       Adding bincode v1.3.3 (available: v2.0.1)
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+2440211fe03bc45c89b6dc1a3df18382ce91e32b" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-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:e90291280db7d1fac5b66fc6dad9f9662629e7365a55743daf9bdf73ebc4ea79" "/opt/rustwide/cargo-home/bin/cargo" "+2440211fe03bc45c89b6dc1a3df18382ce91e32b" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] e64838fd6c59fb620389ef30da600ecc711604eb13aa4575dc534edd5a0ca19e
[INFO] running `Command { std: "docker" "start" "-a" "e64838fd6c59fb620389ef30da600ecc711604eb13aa4575dc534edd5a0ca19e", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "e64838fd6c59fb620389ef30da600ecc711604eb13aa4575dc534edd5a0ca19e", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "e64838fd6c59fb620389ef30da600ecc711604eb13aa4575dc534edd5a0ca19e", kill_on_drop: false }`
[INFO] [stdout] e64838fd6c59fb620389ef30da600ecc711604eb13aa4575dc534edd5a0ca19e
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-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=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:e90291280db7d1fac5b66fc6dad9f9662629e7365a55743daf9bdf73ebc4ea79" "/opt/rustwide/cargo-home/bin/cargo" "+2440211fe03bc45c89b6dc1a3df18382ce91e32b" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 58ff10670a1f5e7b909afa2b969825eaa4d571534dc3889edddbdc70d08b28ba
[INFO] running `Command { std: "docker" "start" "-a" "58ff10670a1f5e7b909afa2b969825eaa4d571534dc3889edddbdc70d08b28ba", kill_on_drop: false }`
[INFO] [stderr]    Compiling semver v1.0.27
[INFO] [stderr]    Compiling example v1.1.0
[INFO] [stderr]    Compiling syn v2.0.106
[INFO] [stderr]    Compiling rustc_version v0.4.1
[INFO] [stderr]    Compiling error-stack v0.6.0
[INFO] [stderr]    Compiling tracing-attributes v0.1.30
[INFO] [stderr]    Compiling tracing v0.1.41
[INFO] [stderr]    Compiling serdo v0.1.6 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused macro definition: `send`
[INFO] [stdout]    --> src/undo_store.rs:480:14
[INFO] [stdout]     |
[INFO] [stdout] 480 | macro_rules! send {
[INFO] [stdout]     |              ^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_macros)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 7.25s
[INFO] running `Command { std: "docker" "inspect" "58ff10670a1f5e7b909afa2b969825eaa4d571534dc3889edddbdc70d08b28ba", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "58ff10670a1f5e7b909afa2b969825eaa4d571534dc3889edddbdc70d08b28ba", kill_on_drop: false }`
[INFO] [stdout] 58ff10670a1f5e7b909afa2b969825eaa4d571534dc3889edddbdc70d08b28ba
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-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=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:e90291280db7d1fac5b66fc6dad9f9662629e7365a55743daf9bdf73ebc4ea79" "/opt/rustwide/cargo-home/bin/cargo" "+2440211fe03bc45c89b6dc1a3df18382ce91e32b" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 7807d763ea0f8c9fb8d7cb3eaae85a80f78a26d3568302cd4880270260599b45
[INFO] running `Command { std: "docker" "start" "-a" "7807d763ea0f8c9fb8d7cb3eaae85a80f78a26d3568302cd4880270260599b45", kill_on_drop: false }`
[INFO] [stderr]    Compiling regex-automata v0.4.11
[INFO] [stderr]    Compiling tracing v0.1.41
[INFO] [stderr]    Compiling nu-ansi-term v0.50.1
[INFO] [stderr]    Compiling tracing-log v0.2.0
[INFO] [stderr]    Compiling tempfile v3.23.0
[INFO] [stderr]    Compiling serdo v0.1.6 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused macro definition: `send`
[INFO] [stdout]    --> src/undo_store.rs:480:14
[INFO] [stdout]     |
[INFO] [stdout] 480 | macro_rules! send {
[INFO] [stdout]     |              ^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_macros)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]    Compiling matchers v0.2.0
[INFO] [stderr]    Compiling tracing-subscriber v0.3.20
[INFO] [stdout] warning: unused macro definition: `send`
[INFO] [stdout]    --> src/undo_store.rs:480:14
[INFO] [stdout]     |
[INFO] [stdout] 480 | macro_rules! send {
[INFO] [stdout]     |              ^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_macros)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant `Sub` is never constructed
[INFO] [stdout]     --> src/undo_store.rs:1394:19
[INFO] [stdout]      |
[INFO] [stdout] 1393 |     enum SumCmd {
[INFO] [stdout]      |          ------ variant in this enum
[INFO] [stdout] 1394 |         Add(i32), Sub(i32),
[INFO] [stdout]      |                   ^^^
[INFO] [stdout]      |
[INFO] [stdout]      = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: method `sub` is never used
[INFO] [stdout]     --> src/undo_store.rs:1427:12
[INFO] [stdout]      |
[INFO] [stdout] 1424 |     trait Model {
[INFO] [stdout]      |           ----- method in this trait
[INFO] [stdout] ...
[INFO] [stdout] 1427 |         fn sub(&mut self, to_sub: i32) -> Self::Resp;
[INFO] [stdout]      |            ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `test` profile [unoptimized + debuginfo] target(s) in 7.16s
[INFO] running `Command { std: "docker" "inspect" "7807d763ea0f8c9fb8d7cb3eaae85a80f78a26d3568302cd4880270260599b45", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "7807d763ea0f8c9fb8d7cb3eaae85a80f78a26d3568302cd4880270260599b45", kill_on_drop: false }`
[INFO] [stdout] 7807d763ea0f8c9fb8d7cb3eaae85a80f78a26d3568302cd4880270260599b45
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-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=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:e90291280db7d1fac5b66fc6dad9f9662629e7365a55743daf9bdf73ebc4ea79" "/opt/rustwide/cargo-home/bin/cargo" "+2440211fe03bc45c89b6dc1a3df18382ce91e32b" "test" "--frozen", kill_on_drop: false }`
[INFO] [stdout] e6c8809701b30beb7f7969584ec49967f274ea58d8a80ca63d74fc146d3cb893
[INFO] running `Command { std: "docker" "start" "-a" "e6c8809701b30beb7f7969584ec49967f274ea58d8a80ca63d74fc146d3cb893", kill_on_drop: false }`
[INFO] [stderr] warning: unused macro definition: `send`
[INFO] [stderr]    --> src/undo_store.rs:480:14
[INFO] [stderr]     |
[INFO] [stderr] 480 | macro_rules! send {
[INFO] [stderr]     |              ^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: `#[warn(unused_macros)]` (part of `#[warn(unused)]`) on by default
[INFO] [stderr] 
[INFO] [stderr] warning: `serdo` (lib) generated 1 warning
[INFO] [stderr] warning: variant `Sub` is never constructed
[INFO] [stderr]     --> src/undo_store.rs:1394:19
[INFO] [stderr]      |
[INFO] [stderr] 1393 |     enum SumCmd {
[INFO] [stderr]      |          ------ variant in this enum
[INFO] [stderr] 1394 |         Add(i32), Sub(i32),
[INFO] [stderr]      |                   ^^^
[INFO] [stderr]      |
[INFO] [stderr]      = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stderr] 
[INFO] [stderr] warning: method `sub` is never used
[INFO] [stderr]     --> src/undo_store.rs:1427:12
[INFO] [stderr]      |
[INFO] [stderr] 1424 |     trait Model {
[INFO] [stderr]      |           ----- method in this trait
[INFO] [stderr] ...
[INFO] [stderr] 1427 |         fn sub(&mut self, to_sub: i32) -> Self::Resp;
[INFO] [stderr]      |            ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: `serdo` (lib test) generated 3 warnings (1 duplicate)
[INFO] [stderr]     Finished `test` profile [unoptimized + debuginfo] target(s) in 0.14s
[INFO] [stderr]      Running unittests src/lib.rs (/opt/rustwide/target/debug/deps/serdo-f4d03af176a7ab73)
[INFO] [stdout] 
[INFO] [stdout] running 4 tests
[INFO] [stdout] test cmd::tests::do_action ... ok
[INFO] [stdout] test undo_store::tests::can_undo_in_memory_store ... ok
[INFO] [stdout] test undo_store::tests::can_undo_redo_in_memory_store ... ok
[INFO] [stdout] test undo_store::tests::undo_and_add_cmd ... ok
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 4 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.00s
[INFO] [stdout] 
[INFO] [stderr]    Doc-tests serdo
[INFO] [stdout] 
[INFO] [stdout] running 0 tests
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 0 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.00s
[INFO] [stdout] 
[INFO] running `Command { std: "docker" "inspect" "e6c8809701b30beb7f7969584ec49967f274ea58d8a80ca63d74fc146d3cb893", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "e6c8809701b30beb7f7969584ec49967f274ea58d8a80ca63d74fc146d3cb893", kill_on_drop: false }`
[INFO] [stdout] e6c8809701b30beb7f7969584ec49967f274ea58d8a80ca63d74fc146d3cb893