[INFO] fetching crate easy-xml 0.1.4...
[INFO] checking easy-xml-0.1.4 against master#ceab6128fa48a616bfd3e3adf4bc80133b8ee223 for no-never-type-fallback
[INFO] extracting crate easy-xml 0.1.4 into /workspace/builds/worker-3-tc1/source
[INFO] validating manifest of crates.io crate easy-xml 0.1.4 on toolchain ceab6128fa48a616bfd3e3adf4bc80133b8ee223
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+ceab6128fa48a616bfd3e3adf4bc80133b8ee223" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate easy-xml 0.1.4
[INFO] finished tweaking crates.io crate easy-xml 0.1.4
[INFO] tweaked toml for crates.io crate easy-xml 0.1.4 written to /workspace/builds/worker-3-tc1/source/Cargo.toml
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+ceab6128fa48a616bfd3e3adf4bc80133b8ee223" "generate-lockfile" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Updating crates.io index
[INFO] [stderr]      Locking 7 packages
[INFO] [stderr]       Adding syn v1.0.109 (latest: v2.0.58)
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+ceab6128fa48a616bfd3e3adf4bc80133b8ee223" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded easy-xml-derive v0.1.4
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-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@sha256:2788e3201cd34a07e3172128adcd8b3090168a8e3bcc40d7c032b9dda1df7d1c" "/opt/rustwide/cargo-home/bin/cargo" "+ceab6128fa48a616bfd3e3adf4bc80133b8ee223" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] dac8b653e8642f29a073707a423a2dee63acd1286e085d217e8cfda1dc5b0bfd
[INFO] running `Command { std: "docker" "start" "-a" "dac8b653e8642f29a073707a423a2dee63acd1286e085d217e8cfda1dc5b0bfd", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "dac8b653e8642f29a073707a423a2dee63acd1286e085d217e8cfda1dc5b0bfd", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "dac8b653e8642f29a073707a423a2dee63acd1286e085d217e8cfda1dc5b0bfd", kill_on_drop: false }`
[INFO] [stdout] dac8b653e8642f29a073707a423a2dee63acd1286e085d217e8cfda1dc5b0bfd
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-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@sha256:2788e3201cd34a07e3172128adcd8b3090168a8e3bcc40d7c032b9dda1df7d1c" "/opt/rustwide/cargo-home/bin/cargo" "+ceab6128fa48a616bfd3e3adf4bc80133b8ee223" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 38bda3a5ee4d96ba3e2780dc483bed2833b605ffb0de987d9eef0c2a3bd62465
[INFO] running `Command { std: "docker" "start" "-a" "38bda3a5ee4d96ba3e2780dc483bed2833b605ffb0de987d9eef0c2a3bd62465", kill_on_drop: false }`
[INFO] [stderr]    Compiling easy-xml-derive v0.1.4
[INFO] [stderr]     Checking easy-xml v0.1.4 (/opt/rustwide/workdir)
[INFO] [stdout] warning: function cannot return without recursing
[INFO] [stdout]    --> src/lib.rs:294:5
[INFO] [stdout]     |
[INFO] [stdout] 294 | /     fn serialize(&self, element: &mut XmlElement)
[INFO] [stdout] 295 | |     where
[INFO] [stdout] 296 | |         Self: Sized,
[INFO] [stdout]     | |____________________^ cannot return without recursing
[INFO] [stdout] 297 |       {
[INFO] [stdout] 298 |           self.borrow().serialize(element);
[INFO] [stdout]     |           -------------------------------- recursive call site
[INFO] [stdout]     |
[INFO] [stdout]     = help: a `loop` may express intention better if this is on purpose
[INFO] [stdout]     = note: `#[warn(unconditional_recursion)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function cannot return without recursing
[INFO] [stdout]    --> src/lib.rs:294:5
[INFO] [stdout]     |
[INFO] [stdout] 294 | /     fn serialize(&self, element: &mut XmlElement)
[INFO] [stdout] 295 | |     where
[INFO] [stdout] 296 | |         Self: Sized,
[INFO] [stdout]     | |____________________^ cannot return without recursing
[INFO] [stdout] 297 |       {
[INFO] [stdout] 298 |           self.borrow().serialize(element);
[INFO] [stdout]     |           -------------------------------- recursive call site
[INFO] [stdout]     |
[INFO] [stdout]     = help: a `loop` may express intention better if this is on purpose
[INFO] [stdout]     = note: `#[warn(unconditional_recursion)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: call to `.borrow()` on a reference in this situation does nothing
[INFO] [stdout]    --> src/lib.rs:298:13
[INFO] [stdout]     |
[INFO] [stdout] 298 |         self.borrow().serialize(element);
[INFO] [stdout]     |             ^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: the type `Cell<T>` does not implement `Borrow`, so calling `borrow` on `&Cell<T>` copies the reference, which does not do anything and can be removed
[INFO] [stdout]     = note: `#[warn(noop_method_call)]` on by default
[INFO] [stdout] help: remove this redundant call
[INFO] [stdout]     |
[INFO] [stdout] 298 -         self.borrow().serialize(element);
[INFO] [stdout] 298 +         self.serialize(element);
[INFO] [stdout]     |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: call to `.borrow()` on a reference in this situation does nothing
[INFO] [stdout]    --> src/lib.rs:298:13
[INFO] [stdout]     |
[INFO] [stdout] 298 |         self.borrow().serialize(element);
[INFO] [stdout]     |             ^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: the type `Cell<T>` does not implement `Borrow`, so calling `borrow` on `&Cell<T>` copies the reference, which does not do anything and can be removed
[INFO] [stdout]     = note: `#[warn(noop_method_call)]` on by default
[INFO] [stdout] help: remove this redundant call
[INFO] [stdout]     |
[INFO] [stdout] 298 -         self.borrow().serialize(element);
[INFO] [stdout] 298 +         self.serialize(element);
[INFO] [stdout]     |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 2 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 2 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 1.36s
[INFO] running `Command { std: "docker" "inspect" "38bda3a5ee4d96ba3e2780dc483bed2833b605ffb0de987d9eef0c2a3bd62465", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "38bda3a5ee4d96ba3e2780dc483bed2833b605ffb0de987d9eef0c2a3bd62465", kill_on_drop: false }`
[INFO] [stdout] 38bda3a5ee4d96ba3e2780dc483bed2833b605ffb0de987d9eef0c2a3bd62465
[INFO] checking easy-xml-0.1.4 against try#3a4bc97f6385a3aa300a4fd689b44350e54fd676 for no-never-type-fallback
[INFO] extracting crate easy-xml 0.1.4 into /workspace/builds/worker-3-tc2/source
[INFO] validating manifest of crates.io crate easy-xml 0.1.4 on toolchain 3a4bc97f6385a3aa300a4fd689b44350e54fd676
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+3a4bc97f6385a3aa300a4fd689b44350e54fd676" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate easy-xml 0.1.4
[INFO] finished tweaking crates.io crate easy-xml 0.1.4
[INFO] tweaked toml for crates.io crate easy-xml 0.1.4 written to /workspace/builds/worker-3-tc2/source/Cargo.toml
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+3a4bc97f6385a3aa300a4fd689b44350e54fd676" "generate-lockfile" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Updating crates.io index
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+3a4bc97f6385a3aa300a4fd689b44350e54fd676" "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@sha256:2788e3201cd34a07e3172128adcd8b3090168a8e3bcc40d7c032b9dda1df7d1c" "/opt/rustwide/cargo-home/bin/cargo" "+3a4bc97f6385a3aa300a4fd689b44350e54fd676" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 5e48b54c0c60639e54963a46dff1b9812e695db08479723799149d276b36ce86
[INFO] running `Command { std: "docker" "start" "-a" "5e48b54c0c60639e54963a46dff1b9812e695db08479723799149d276b36ce86", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "5e48b54c0c60639e54963a46dff1b9812e695db08479723799149d276b36ce86", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "5e48b54c0c60639e54963a46dff1b9812e695db08479723799149d276b36ce86", kill_on_drop: false }`
[INFO] [stdout] 5e48b54c0c60639e54963a46dff1b9812e695db08479723799149d276b36ce86
[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@sha256:2788e3201cd34a07e3172128adcd8b3090168a8e3bcc40d7c032b9dda1df7d1c" "/opt/rustwide/cargo-home/bin/cargo" "+3a4bc97f6385a3aa300a4fd689b44350e54fd676" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] aa96f05252c6ee6ae6b037ec8434704f2e6a2ac4ea2d436c4d64b3026d58e396
[INFO] running `Command { std: "docker" "start" "-a" "aa96f05252c6ee6ae6b037ec8434704f2e6a2ac4ea2d436c4d64b3026d58e396", kill_on_drop: false }`
[INFO] [stderr]    Compiling easy-xml-derive v0.1.4
[INFO] [stdout] error[E0284]: type annotations needed: cannot satisfy `_ -> _`
[INFO] [stdout]   --> /opt/rustwide/cargo-home/registry/src/index.crates.io-6f17d22bba15001f/easy-xml-derive-0.1.4/src/de/mod.rs:17:13
[INFO] [stdout]    |
[INFO] [stdout] 17 |             panic!("{}", "不支持 Union")
[INFO] [stdout]    |             ^^^^^^^^^^^^^^^^^^^^^^^^^^^^ cannot satisfy `_ -> _`
[INFO] [stdout]    |
[INFO] [stdout]    = note: this error originates in the macro `$crate::panic::panic_2015` which comes from the expansion of the macro `panic` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0284]: type annotations needed: cannot satisfy `_ -> _`
[INFO] [stdout]   --> /opt/rustwide/cargo-home/registry/src/index.crates.io-6f17d22bba15001f/easy-xml-derive-0.1.4/src/se/mod.rs:18:13
[INFO] [stdout]    |
[INFO] [stdout] 18 |             panic!("{}", "不支持 Union")
[INFO] [stdout]    |             ^^^^^^^^^^^^^^^^^^^^^^^^^^^^ cannot satisfy `_ -> _`
[INFO] [stdout]    |
[INFO] [stdout]    = note: this error originates in the macro `$crate::panic::panic_2015` which comes from the expansion of the macro `panic` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to 2 previous errors
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0284`.
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `easy-xml-derive` (lib) due to 3 previous errors
[INFO] running `Command { std: "docker" "inspect" "aa96f05252c6ee6ae6b037ec8434704f2e6a2ac4ea2d436c4d64b3026d58e396", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "aa96f05252c6ee6ae6b037ec8434704f2e6a2ac4ea2d436c4d64b3026d58e396", kill_on_drop: false }`
[INFO] [stdout] aa96f05252c6ee6ae6b037ec8434704f2e6a2ac4ea2d436c4d64b3026d58e396