[INFO] cloning repository https://github.com/vjancik/serde_bug
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/vjancik/serde_bug" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fvjancik%2Fserde_bug", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fvjancik%2Fserde_bug'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] d96913c9f6acdc99179a80168ec89b1a70172d9a
[INFO] testing vjancik/serde_bug against master#414482f6a0d4e7290f614300581a0b55442552a3 for pr-140985
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fvjancik%2Fserde_bug" "/workspace/builds/worker-0-tc1/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-0-tc1/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/vjancik/serde_bug on toolchain 414482f6a0d4e7290f614300581a0b55442552a3
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+414482f6a0d4e7290f614300581a0b55442552a3" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/vjancik/serde_bug
[INFO] finished tweaking git repo https://github.com/vjancik/serde_bug
[INFO] tweaked toml for git repo https://github.com/vjancik/serde_bug written to /workspace/builds/worker-0-tc1/source/Cargo.toml
[INFO] crate git repo https://github.com/vjancik/serde_bug already has a lockfile, it will not be regenerated
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+414482f6a0d4e7290f614300581a0b55442552a3" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-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:eea15d5475069c3ef791f10c2c6b5af2ee421ef2da1e680ecce1cba46243983b" "/opt/rustwide/cargo-home/bin/cargo" "+414482f6a0d4e7290f614300581a0b55442552a3" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 0e14b6bf57aa6eddf842a6db14f8f7cc2a437aa4d331aa2cbf0f9fce3a10a75f
[INFO] running `Command { std: "docker" "start" "-a" "0e14b6bf57aa6eddf842a6db14f8f7cc2a437aa4d331aa2cbf0f9fce3a10a75f", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "0e14b6bf57aa6eddf842a6db14f8f7cc2a437aa4d331aa2cbf0f9fce3a10a75f", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "0e14b6bf57aa6eddf842a6db14f8f7cc2a437aa4d331aa2cbf0f9fce3a10a75f", kill_on_drop: false }`
[INFO] [stdout] 0e14b6bf57aa6eddf842a6db14f8f7cc2a437aa4d331aa2cbf0f9fce3a10a75f
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-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:eea15d5475069c3ef791f10c2c6b5af2ee421ef2da1e680ecce1cba46243983b" "/opt/rustwide/cargo-home/bin/cargo" "+414482f6a0d4e7290f614300581a0b55442552a3" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] afb1fb72b8e90b3370bbcc85994a3e91bc582d86e44b0e9741182d8904c031ff
[INFO] running `Command { std: "docker" "start" "-a" "afb1fb72b8e90b3370bbcc85994a3e91bc582d86e44b0e9741182d8904c031ff", kill_on_drop: false }`
[INFO] [stderr]    Compiling proc-macro2 v1.0.24
[INFO] [stderr]    Compiling unicode-xid v0.2.1
[INFO] [stderr]    Compiling syn v1.0.58
[INFO] [stderr]    Compiling serde_derive v1.0.119
[INFO] [stderr]    Compiling serde v1.0.119
[INFO] [stderr]    Compiling quote v1.0.8
[INFO] [stderr]    Compiling toml v0.5.8
[INFO] [stderr]    Compiling serde_bug v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: fields `optional` and `notoptional` are never read
[INFO] [stdout]  --> src/main.rs:8:5
[INFO] [stdout]   |
[INFO] [stdout] 6 | struct TestStruct {
[INFO] [stdout]   |        ---------- fields in this struct
[INFO] [stdout] 7 |     #[serde(deserialize_with ="callback")]
[INFO] [stdout] 8 |     optional: Option<i32>,
[INFO] [stdout]   |     ^^^^^^^^
[INFO] [stdout] 9 |     notoptional: i32,
[INFO] [stdout]   |     ^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `TestStruct` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stdout]   = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 12.93s
[INFO] running `Command { std: "docker" "inspect" "afb1fb72b8e90b3370bbcc85994a3e91bc582d86e44b0e9741182d8904c031ff", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "afb1fb72b8e90b3370bbcc85994a3e91bc582d86e44b0e9741182d8904c031ff", kill_on_drop: false }`
[INFO] [stdout] afb1fb72b8e90b3370bbcc85994a3e91bc582d86e44b0e9741182d8904c031ff
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-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:eea15d5475069c3ef791f10c2c6b5af2ee421ef2da1e680ecce1cba46243983b" "/opt/rustwide/cargo-home/bin/cargo" "+414482f6a0d4e7290f614300581a0b55442552a3" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 3d6916c5d1fef0ba064267ec7e16ea087b2316b4870169eb5923c61b5d41b520
[INFO] running `Command { std: "docker" "start" "-a" "3d6916c5d1fef0ba064267ec7e16ea087b2316b4870169eb5923c61b5d41b520", kill_on_drop: false }`
[INFO] [stderr]    Compiling serde_bug v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: fields `optional` and `notoptional` are never read
[INFO] [stdout]  --> src/main.rs:8:5
[INFO] [stdout]   |
[INFO] [stdout] 6 | struct TestStruct {
[INFO] [stdout]   |        ---------- fields in this struct
[INFO] [stdout] 7 |     #[serde(deserialize_with ="callback")]
[INFO] [stdout] 8 |     optional: Option<i32>,
[INFO] [stdout]   |     ^^^^^^^^
[INFO] [stdout] 9 |     notoptional: i32,
[INFO] [stdout]   |     ^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `TestStruct` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stdout]   = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `test` profile [unoptimized + debuginfo] target(s) in 0.39s
[INFO] running `Command { std: "docker" "inspect" "3d6916c5d1fef0ba064267ec7e16ea087b2316b4870169eb5923c61b5d41b520", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "3d6916c5d1fef0ba064267ec7e16ea087b2316b4870169eb5923c61b5d41b520", kill_on_drop: false }`
[INFO] [stdout] 3d6916c5d1fef0ba064267ec7e16ea087b2316b4870169eb5923c61b5d41b520
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-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:eea15d5475069c3ef791f10c2c6b5af2ee421ef2da1e680ecce1cba46243983b" "/opt/rustwide/cargo-home/bin/cargo" "+414482f6a0d4e7290f614300581a0b55442552a3" "test" "--frozen", kill_on_drop: false }`
[INFO] [stdout] 8c2249242d8ac0d84d122c1e93fb73f4525a7857eb845c9a3fed4afa77e419cd
[INFO] running `Command { std: "docker" "start" "-a" "8c2249242d8ac0d84d122c1e93fb73f4525a7857eb845c9a3fed4afa77e419cd", kill_on_drop: false }`
[INFO] [stderr] warning: fields `optional` and `notoptional` are never read
[INFO] [stderr]  --> src/main.rs:8:5
[INFO] [stderr]   |
[INFO] [stderr] 6 | struct TestStruct {
[INFO] [stderr]   |        ---------- fields in this struct
[INFO] [stderr] 7 |     #[serde(deserialize_with ="callback")]
[INFO] [stderr] 8 |     optional: Option<i32>,
[INFO] [stderr]   |     ^^^^^^^^
[INFO] [stderr] 9 |     notoptional: i32,
[INFO] [stderr]   |     ^^^^^^^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: `TestStruct` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stderr]   = note: `#[warn(dead_code)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: `serde_bug` (bin "serde_bug" test) generated 1 warning
[INFO] [stderr]     Finished `test` profile [unoptimized + debuginfo] target(s) in 0.03s
[INFO] [stderr]      Running unittests src/main.rs (/opt/rustwide/target/debug/deps/serde_bug-e7f821552130f9ca)
[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" "8c2249242d8ac0d84d122c1e93fb73f4525a7857eb845c9a3fed4afa77e419cd", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "8c2249242d8ac0d84d122c1e93fb73f4525a7857eb845c9a3fed4afa77e419cd", kill_on_drop: false }`
[INFO] [stdout] 8c2249242d8ac0d84d122c1e93fb73f4525a7857eb845c9a3fed4afa77e419cd