[INFO] fetching crate maybe-serde 0.2.1... [INFO] testing maybe-serde-0.2.1 against try#8de4c7234dd9b97c9d76b58671343fdbbc9a433e+target=x86_64-unknown-linux-musl for musl_upgrade_1_2_5_with_libc_patch_0 [INFO] extracting crate maybe-serde 0.2.1 into /workspace/builds/worker-2-tc1/source [INFO] started tweaking crates.io crate maybe-serde 0.2.1 [INFO] finished tweaking crates.io crate maybe-serde 0.2.1 [INFO] tweaked toml for crates.io crate maybe-serde 0.2.1 written to /workspace/builds/worker-2-tc1/source/Cargo.toml [INFO] validating manifest of crates.io crate maybe-serde 0.2.1 on toolchain 8de4c7234dd9b97c9d76b58671343fdbbc9a433e [INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+8de4c7234dd9b97c9d76b58671343fdbbc9a433e" "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" "+8de4c7234dd9b97c9d76b58671343fdbbc9a433e" "generate-lockfile" "--manifest-path" "Cargo.toml", kill_on_drop: false }` [INFO] [stderr] Blocking waiting for file lock on package cache [INFO] [stderr] Updating crates.io index [INFO] [stderr] Locking 10 packages to latest compatible versions [INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+8de4c7234dd9b97c9d76b58671343fdbbc9a433e" "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@sha256:90999bfc7ae267e83380e433d8e61a7c072ca6729e92edbae886d3423b3a6f4c" "/opt/rustwide/cargo-home/bin/cargo" "+8de4c7234dd9b97c9d76b58671343fdbbc9a433e" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }` [INFO] [stdout] d4b76847200ae255502774d562716aac316f8b7a0ecb63112f787d4b7fea684d [INFO] running `Command { std: "docker" "start" "-a" "d4b76847200ae255502774d562716aac316f8b7a0ecb63112f787d4b7fea684d", kill_on_drop: false }` [INFO] running `Command { std: "docker" "inspect" "d4b76847200ae255502774d562716aac316f8b7a0ecb63112f787d4b7fea684d", kill_on_drop: false }` [INFO] running `Command { std: "docker" "rm" "-f" "d4b76847200ae255502774d562716aac316f8b7a0ecb63112f787d4b7fea684d", kill_on_drop: false }` [INFO] [stdout] d4b76847200ae255502774d562716aac316f8b7a0ecb63112f787d4b7fea684d [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=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@sha256:90999bfc7ae267e83380e433d8e61a7c072ca6729e92edbae886d3423b3a6f4c" "/opt/rustwide/cargo-home/bin/cargo" "+8de4c7234dd9b97c9d76b58671343fdbbc9a433e" "build" "--frozen" "--message-format=json" "--target" "x86_64-unknown-linux-musl", kill_on_drop: false }` [INFO] [stdout] cc4fa3539bf701c083f01704a75b147205812e8809db59af136901dd8793ba82 [INFO] running `Command { std: "docker" "start" "-a" "cc4fa3539bf701c083f01704a75b147205812e8809db59af136901dd8793ba82", kill_on_drop: false }` [INFO] [stderr] Compiling serde v1.0.219 [INFO] [stderr] Compiling maybe-serde v0.2.1 (/opt/rustwide/workdir) [INFO] [stdout] warning: the feature `specialization` is incomplete and may not be safe to use and/or cause compiler crashes [INFO] [stdout] --> src/lib.rs:1:12 [INFO] [stdout] | [INFO] [stdout] 1 | #![feature(specialization)] [INFO] [stdout] | ^^^^^^^^^^^^^^ [INFO] [stdout] | [INFO] [stdout] = note: see issue #31844 for more information [INFO] [stdout] = help: consider using `min_specialization` instead, which is more stable and complete [INFO] [stdout] = note: `#[warn(incomplete_features)]` on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stderr] Finished `dev` profile [unoptimized + debuginfo] target(s) in 3.29s [INFO] running `Command { std: "docker" "inspect" "cc4fa3539bf701c083f01704a75b147205812e8809db59af136901dd8793ba82", kill_on_drop: false }` [INFO] running `Command { std: "docker" "rm" "-f" "cc4fa3539bf701c083f01704a75b147205812e8809db59af136901dd8793ba82", kill_on_drop: false }` [INFO] [stdout] cc4fa3539bf701c083f01704a75b147205812e8809db59af136901dd8793ba82 [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=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@sha256:90999bfc7ae267e83380e433d8e61a7c072ca6729e92edbae886d3423b3a6f4c" "/opt/rustwide/cargo-home/bin/cargo" "+8de4c7234dd9b97c9d76b58671343fdbbc9a433e" "test" "--frozen" "--no-run" "--message-format=json" "--target" "x86_64-unknown-linux-musl", kill_on_drop: false }` [INFO] [stdout] a3817a482a6eca63316e15a718a3a59b5a5a7a80bd583ee89e8723f7acb1a838 [INFO] running `Command { std: "docker" "start" "-a" "a3817a482a6eca63316e15a718a3a59b5a5a7a80bd583ee89e8723f7acb1a838", kill_on_drop: false }` [INFO] [stderr] Compiling proc-macro2 v1.0.95 [INFO] [stderr] Compiling serde_json v1.0.140 [INFO] [stdout] warning: the feature `specialization` is incomplete and may not be safe to use and/or cause compiler crashes [INFO] [stdout] --> src/lib.rs:1:12 [INFO] [stdout] | [INFO] [stdout] 1 | #![feature(specialization)] [INFO] [stdout] | ^^^^^^^^^^^^^^ [INFO] [stdout] | [INFO] [stdout] = note: see issue #31844 for more information [INFO] [stdout] = help: consider using `min_specialization` instead, which is more stable and complete [INFO] [stdout] = note: `#[warn(incomplete_features)]` on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stderr] Compiling quote v1.0.40 [INFO] [stderr] Compiling syn v2.0.104 [INFO] [stderr] Compiling serde_derive v1.0.219 [INFO] [stderr] Compiling maybe-serde v0.2.1 (/opt/rustwide/workdir) [INFO] [stdout] warning: the feature `specialization` is incomplete and may not be safe to use and/or cause compiler crashes [INFO] [stdout] --> src/lib.rs:1:12 [INFO] [stdout] | [INFO] [stdout] 1 | #![feature(specialization)] [INFO] [stdout] | ^^^^^^^^^^^^^^ [INFO] [stdout] | [INFO] [stdout] = note: see issue #31844 for more information [INFO] [stdout] = help: consider using `min_specialization` instead, which is more stable and complete [INFO] [stdout] = note: `#[warn(incomplete_features)]` on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: field `0` is never read [INFO] [stdout] --> src/lib.rs:179:22 [INFO] [stdout] | [INFO] [stdout] 179 | struct NoneSerde(i32); [INFO] [stdout] | --------- ^^^ [INFO] [stdout] | | [INFO] [stdout] | field in this struct [INFO] [stdout] | [INFO] [stdout] = help: consider removing this field [INFO] [stdout] = note: `#[warn(dead_code)]` on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: field `0` is never read [INFO] [stdout] --> src/lib.rs:186:26 [INFO] [stdout] | [INFO] [stdout] 186 | struct NoneSerde(i32); [INFO] [stdout] | --------- ^^^ [INFO] [stdout] | | [INFO] [stdout] | field in this struct [INFO] [stdout] | [INFO] [stdout] = help: consider removing this field [INFO] [stdout] [INFO] [stdout] [INFO] [stderr] Finished `test` profile [unoptimized + debuginfo] target(s) in 8.76s [INFO] running `Command { std: "docker" "inspect" "a3817a482a6eca63316e15a718a3a59b5a5a7a80bd583ee89e8723f7acb1a838", kill_on_drop: false }` [INFO] running `Command { std: "docker" "rm" "-f" "a3817a482a6eca63316e15a718a3a59b5a5a7a80bd583ee89e8723f7acb1a838", kill_on_drop: false }` [INFO] [stdout] a3817a482a6eca63316e15a718a3a59b5a5a7a80bd583ee89e8723f7acb1a838 [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=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@sha256:90999bfc7ae267e83380e433d8e61a7c072ca6729e92edbae886d3423b3a6f4c" "/opt/rustwide/cargo-home/bin/cargo" "+8de4c7234dd9b97c9d76b58671343fdbbc9a433e" "test" "--frozen" "--target" "x86_64-unknown-linux-musl", kill_on_drop: false }` [INFO] [stdout] 3579ac5cd27368bcd707b5f44c52cf7a0c54ad963821d9ee3f4cb86fcf215dad [INFO] running `Command { std: "docker" "start" "-a" "3579ac5cd27368bcd707b5f44c52cf7a0c54ad963821d9ee3f4cb86fcf215dad", kill_on_drop: false }` [INFO] [stderr] warning: the feature `specialization` is incomplete and may not be safe to use and/or cause compiler crashes [INFO] [stderr] --> src/lib.rs:1:12 [INFO] [stderr] | [INFO] [stderr] 1 | #![feature(specialization)] [INFO] [stderr] | ^^^^^^^^^^^^^^ [INFO] [stderr] | [INFO] [stderr] = note: see issue #31844 for more information [INFO] [stderr] = help: consider using `min_specialization` instead, which is more stable and complete [INFO] [stderr] = note: `#[warn(incomplete_features)]` on by default [INFO] [stderr] [INFO] [stderr] warning: `maybe-serde` (lib) generated 1 warning [INFO] [stderr] warning: field `0` is never read [INFO] [stderr] --> src/lib.rs:179:22 [INFO] [stderr] | [INFO] [stderr] 179 | struct NoneSerde(i32); [INFO] [stderr] | --------- ^^^ [INFO] [stderr] | | [INFO] [stderr] | field in this struct [INFO] [stderr] | [INFO] [stderr] = help: consider removing this field [INFO] [stderr] = note: `#[warn(dead_code)]` on by default [INFO] [stderr] [INFO] [stderr] warning: field `0` is never read [INFO] [stderr] --> src/lib.rs:186:26 [INFO] [stderr] | [INFO] [stderr] 186 | struct NoneSerde(i32); [INFO] [stderr] | --------- ^^^ [INFO] [stderr] | | [INFO] [stderr] | field in this struct [INFO] [stderr] | [INFO] [stderr] = help: consider removing this field [INFO] [stderr] [INFO] [stderr] warning: `maybe-serde` (lib test) generated 3 warnings (1 duplicate) [INFO] [stderr] Finished `test` profile [unoptimized + debuginfo] target(s) in 0.06s [INFO] [stderr] Running unittests src/lib.rs (/opt/rustwide/target/x86_64-unknown-linux-musl/debug/deps/maybe_serde-734de42500122163) [INFO] [stdout] [INFO] [stdout] running 4 tests [INFO] [stdout] test tests::serde_none_maybe_serde ... ok [INFO] [stdout] test tests::serde_some ... ok [INFO] [stdout] test tests::serde_some_maybe_serde ... ok [INFO] [stdout] test tests::serde_none ... ok [INFO] [stdout] [INFO] [stdout] test result: ok. 4 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.01s [INFO] [stdout] [INFO] running `Command { std: "docker" "inspect" "3579ac5cd27368bcd707b5f44c52cf7a0c54ad963821d9ee3f4cb86fcf215dad", kill_on_drop: false }` [INFO] running `Command { std: "docker" "rm" "-f" "3579ac5cd27368bcd707b5f44c52cf7a0c54ad963821d9ee3f4cb86fcf215dad", kill_on_drop: false }` [INFO] [stdout] 3579ac5cd27368bcd707b5f44c52cf7a0c54ad963821d9ee3f4cb86fcf215dad