[INFO] fetching crate mubo 0.1.6...
[INFO] checking mubo-0.1.6 against master#ceab6128fa48a616bfd3e3adf4bc80133b8ee223 for no-never-type-fallback
[INFO] extracting crate mubo 0.1.6 into /workspace/builds/worker-6-tc1/source
[INFO] validating manifest of crates.io crate mubo 0.1.6 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 mubo 0.1.6
[INFO] finished tweaking crates.io crate mubo 0.1.6
[INFO] tweaked toml for crates.io crate mubo 0.1.6 written to /workspace/builds/worker-6-tc1/source/Cargo.toml
[INFO] crate crates.io crate mubo 0.1.6 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" "+ceab6128fa48a616bfd3e3adf4bc80133b8ee223" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded winnow v0.5.4
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-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] 1861f54b5b31e2cfc5268109b18bd58e6e54138c8c1fd5e13f988e29817af7ad
[INFO] running `Command { std: "docker" "start" "-a" "1861f54b5b31e2cfc5268109b18bd58e6e54138c8c1fd5e13f988e29817af7ad", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "1861f54b5b31e2cfc5268109b18bd58e6e54138c8c1fd5e13f988e29817af7ad", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "1861f54b5b31e2cfc5268109b18bd58e6e54138c8c1fd5e13f988e29817af7ad", kill_on_drop: false }`
[INFO] [stdout] 1861f54b5b31e2cfc5268109b18bd58e6e54138c8c1fd5e13f988e29817af7ad
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-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] 5cfb9da10684142fa9665a36cf8c86016d33f5654b58317addb2a54abbe5f1dc
[INFO] running `Command { std: "docker" "start" "-a" "5cfb9da10684142fa9665a36cf8c86016d33f5654b58317addb2a54abbe5f1dc", kill_on_drop: false }`
[INFO] [stderr]    Compiling serde v1.0.183
[INFO] [stderr]    Compiling serde_derive v1.0.183
[INFO] [stderr]    Compiling serde_json v1.0.104
[INFO] [stderr]    Compiling anyhow v1.0.72
[INFO] [stderr]     Checking winnow v0.5.4
[INFO] [stderr]     Checking toml_datetime v0.6.3
[INFO] [stderr]     Checking serde_spanned v0.6.3
[INFO] [stderr]     Checking toml_edit v0.19.14
[INFO] [stderr]     Checking tinytemplate v1.2.1
[INFO] [stderr]     Checking toml v0.7.6
[INFO] [stderr]     Checking mubo v0.1.6 (/opt/rustwide/workdir)
[INFO] [stdout] warning: `'_` cannot be used here
[INFO] [stdout]  --> src/templates.rs:9:27
[INFO] [stdout]   |
[INFO] [stdout] 9 |     const LINK_TEMPLATE: &'_ str = r#"
[INFO] [stdout]   |                           ^^
[INFO] [stdout]   |
[INFO] [stdout]   = warning: this was previously accepted by the compiler but is being phased out; it will become a hard error in a future release!
[INFO] [stdout]   = note: for more information, see issue #115010 <https://github.com/rust-lang/rust/issues/115010>
[INFO] [stdout]   = note: `#[warn(elided_lifetimes_in_associated_constant)]` on by default
[INFO] [stdout] help: use the `'static` lifetime
[INFO] [stdout]   |
[INFO] [stdout] 9 |     const LINK_TEMPLATE: &'static str = r#"
[INFO] [stdout]   |                           ~~~~~~~
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: `'_` cannot be used here
[INFO] [stdout]  --> src/templates.rs:9:27
[INFO] [stdout]   |
[INFO] [stdout] 9 |     const LINK_TEMPLATE: &'_ str = r#"
[INFO] [stdout]   |                           ^^
[INFO] [stdout]   |
[INFO] [stdout]   = warning: this was previously accepted by the compiler but is being phased out; it will become a hard error in a future release!
[INFO] [stdout]   = note: for more information, see issue #115010 <https://github.com/rust-lang/rust/issues/115010>
[INFO] [stdout]   = note: `#[warn(elided_lifetimes_in_associated_constant)]` on by default
[INFO] [stdout] help: use the `'static` lifetime
[INFO] [stdout]   |
[INFO] [stdout] 9 |     const LINK_TEMPLATE: &'static str = r#"
[INFO] [stdout]   |                           ~~~~~~~
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: `'_` cannot be used here
[INFO] [stdout]   --> src/templates.rs:26:24
[INFO] [stdout]    |
[INFO] [stdout] 26 |     const LINK_INDEX: &'_ str = r#"
[INFO] [stdout]    |                        ^^
[INFO] [stdout]    |
[INFO] [stdout]    = warning: this was previously accepted by the compiler but is being phased out; it will become a hard error in a future release!
[INFO] [stdout]    = note: for more information, see issue #115010 <https://github.com/rust-lang/rust/issues/115010>
[INFO] [stdout] help: use the `'static` lifetime
[INFO] [stdout]    |
[INFO] [stdout] 26 |     const LINK_INDEX: &'static str = r#"
[INFO] [stdout]    |                        ~~~~~~~
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: `'_` cannot be used here
[INFO] [stdout]   --> src/templates.rs:26:24
[INFO] [stdout]    |
[INFO] [stdout] 26 |     const LINK_INDEX: &'_ str = r#"
[INFO] [stdout]    |                        ^^
[INFO] [stdout]    |
[INFO] [stdout]    = warning: this was previously accepted by the compiler but is being phased out; it will become a hard error in a future release!
[INFO] [stdout]    = note: for more information, see issue #115010 <https://github.com/rust-lang/rust/issues/115010>
[INFO] [stdout] help: use the `'static` lifetime
[INFO] [stdout]    |
[INFO] [stdout] 26 |     const LINK_INDEX: &'static str = r#"
[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 3.12s
[INFO] running `Command { std: "docker" "inspect" "5cfb9da10684142fa9665a36cf8c86016d33f5654b58317addb2a54abbe5f1dc", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "5cfb9da10684142fa9665a36cf8c86016d33f5654b58317addb2a54abbe5f1dc", kill_on_drop: false }`
[INFO] [stdout] 5cfb9da10684142fa9665a36cf8c86016d33f5654b58317addb2a54abbe5f1dc
[INFO] checking mubo-0.1.6 against try#3a4bc97f6385a3aa300a4fd689b44350e54fd676 for no-never-type-fallback
[INFO] extracting crate mubo 0.1.6 into /workspace/builds/worker-6-tc2/source
[INFO] validating manifest of crates.io crate mubo 0.1.6 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 mubo 0.1.6
[INFO] finished tweaking crates.io crate mubo 0.1.6
[INFO] tweaked toml for crates.io crate mubo 0.1.6 written to /workspace/builds/worker-6-tc2/source/Cargo.toml
[INFO] crate crates.io crate mubo 0.1.6 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" "+3a4bc97f6385a3aa300a4fd689b44350e54fd676" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-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] 99e2ae739d01f36b3c6e8f3c63cdc65e01674fc515944fd6b592e91f2505ee5d
[INFO] running `Command { std: "docker" "start" "-a" "99e2ae739d01f36b3c6e8f3c63cdc65e01674fc515944fd6b592e91f2505ee5d", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "99e2ae739d01f36b3c6e8f3c63cdc65e01674fc515944fd6b592e91f2505ee5d", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "99e2ae739d01f36b3c6e8f3c63cdc65e01674fc515944fd6b592e91f2505ee5d", kill_on_drop: false }`
[INFO] [stdout] 99e2ae739d01f36b3c6e8f3c63cdc65e01674fc515944fd6b592e91f2505ee5d
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-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] e291b2aab174c789e1d33358e07307a4cb130eea3fa9810b49f3544d2a90121e
[INFO] running `Command { std: "docker" "start" "-a" "e291b2aab174c789e1d33358e07307a4cb130eea3fa9810b49f3544d2a90121e", kill_on_drop: false }`
[INFO] [stderr]    Compiling serde v1.0.183
[INFO] [stderr]    Compiling serde_derive v1.0.183
[INFO] [stderr]     Checking hashbrown v0.14.0
[INFO] [stderr]    Compiling serde_json v1.0.104
[INFO] [stderr]     Checking equivalent v1.0.1
[INFO] [stderr]     Checking winnow v0.5.4
[INFO] [stderr]    Compiling anyhow v1.0.72
[INFO] [stderr]     Checking ryu v1.0.15
[INFO] [stdout] error[E0282]: type annotations needed
[INFO] [stdout]   --> /opt/rustwide/cargo-home/registry/src/index.crates.io-6f17d22bba15001f/serde_derive-1.0.183/src/lib_precompiled.rs:68:9
[INFO] [stdout]    |
[INFO] [stdout] 68 |         panic!();
[INFO] [stdout]    |         ^^^^^^^^ cannot infer type
[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 1 previous error
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0282`.
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `serde_derive` (lib) due to 2 previous errors
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] running `Command { std: "docker" "inspect" "e291b2aab174c789e1d33358e07307a4cb130eea3fa9810b49f3544d2a90121e", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "e291b2aab174c789e1d33358e07307a4cb130eea3fa9810b49f3544d2a90121e", kill_on_drop: false }`
[INFO] [stdout] e291b2aab174c789e1d33358e07307a4cb130eea3fa9810b49f3544d2a90121e