[INFO] fetching crate riscv_emu_rust 0.2.0...
[INFO] checking riscv_emu_rust-0.2.0 against master#ceab6128fa48a616bfd3e3adf4bc80133b8ee223 for no-never-type-fallback
[INFO] extracting crate riscv_emu_rust 0.2.0 into /workspace/builds/worker-5-tc1/source
[INFO] validating manifest of crates.io crate riscv_emu_rust 0.2.0 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 riscv_emu_rust 0.2.0
[INFO] finished tweaking crates.io crate riscv_emu_rust 0.2.0
[INFO] tweaked toml for crates.io crate riscv_emu_rust 0.2.0 written to /workspace/builds/worker-5-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] 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] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-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] 91139a9cde8281c977da63690915a21f899bf48bf367ea5326b8ef1ef2d44264
[INFO] running `Command { std: "docker" "start" "-a" "91139a9cde8281c977da63690915a21f899bf48bf367ea5326b8ef1ef2d44264", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "91139a9cde8281c977da63690915a21f899bf48bf367ea5326b8ef1ef2d44264", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "91139a9cde8281c977da63690915a21f899bf48bf367ea5326b8ef1ef2d44264", kill_on_drop: false }`
[INFO] [stdout] 91139a9cde8281c977da63690915a21f899bf48bf367ea5326b8ef1ef2d44264
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-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] 71c48d0aff3f360e0f65b25d2e8111f343a7daa4472914f307db0d3a2fe29b92
[INFO] running `Command { std: "docker" "start" "-a" "71c48d0aff3f360e0f65b25d2e8111f343a7daa4472914f307db0d3a2fe29b92", kill_on_drop: false }`
[INFO] [stderr]     Checking riscv_emu_rust v0.2.0 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 0.32s
[INFO] running `Command { std: "docker" "inspect" "71c48d0aff3f360e0f65b25d2e8111f343a7daa4472914f307db0d3a2fe29b92", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "71c48d0aff3f360e0f65b25d2e8111f343a7daa4472914f307db0d3a2fe29b92", kill_on_drop: false }`
[INFO] [stdout] 71c48d0aff3f360e0f65b25d2e8111f343a7daa4472914f307db0d3a2fe29b92
[INFO] checking riscv_emu_rust-0.2.0 against try#3a4bc97f6385a3aa300a4fd689b44350e54fd676 for no-never-type-fallback
[INFO] extracting crate riscv_emu_rust 0.2.0 into /workspace/builds/worker-5-tc2/source
[INFO] validating manifest of crates.io crate riscv_emu_rust 0.2.0 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 riscv_emu_rust 0.2.0
[INFO] finished tweaking crates.io crate riscv_emu_rust 0.2.0
[INFO] tweaked toml for crates.io crate riscv_emu_rust 0.2.0 written to /workspace/builds/worker-5-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] 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-5-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-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] c2d9255fb4eda05705ac626ec21b0e3fab986f62b5418d4c342252e01479b2e1
[INFO] running `Command { std: "docker" "start" "-a" "c2d9255fb4eda05705ac626ec21b0e3fab986f62b5418d4c342252e01479b2e1", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "c2d9255fb4eda05705ac626ec21b0e3fab986f62b5418d4c342252e01479b2e1", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "c2d9255fb4eda05705ac626ec21b0e3fab986f62b5418d4c342252e01479b2e1", kill_on_drop: false }`
[INFO] [stdout] c2d9255fb4eda05705ac626ec21b0e3fab986f62b5418d4c342252e01479b2e1
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-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] 3ef2c3354862baf0bbf8968b1441c2174731c3a51a5b02eb48f50a6ccce842f1
[INFO] running `Command { std: "docker" "start" "-a" "3ef2c3354862baf0bbf8968b1441c2174731c3a51a5b02eb48f50a6ccce842f1", kill_on_drop: false }`
[INFO] [stderr]     Checking riscv_emu_rust v0.2.0 (/opt/rustwide/workdir)
[INFO] [stdout] error[E0282]: type annotations needed
[INFO] [stdout]    --> src/cpu.rs:295:3
[INFO] [stdout]     |
[INFO] [stdout] 295 | /         match self.decode(word) {
[INFO] [stdout] 296 | |             Ok(inst) => {
[INFO] [stdout] 297 | |                 let result = (inst.operation)(self, word, instruction_address);
[INFO] [stdout] 298 | |                 self.x[0] = 0; // hardwired zero
[INFO] [stdout] ...   |
[INFO] [stdout] 303 | |             }
[INFO] [stdout] 304 | |         };
[INFO] [stdout]     | |_________^ cannot infer type
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0282]: type annotations needed
[INFO] [stdout]    --> src/cpu.rs:295:3
[INFO] [stdout]     |
[INFO] [stdout] 295 | /         match self.decode(word) {
[INFO] [stdout] 296 | |             Ok(inst) => {
[INFO] [stdout] 297 | |                 let result = (inst.operation)(self, word, instruction_address);
[INFO] [stdout] 298 | |                 self.x[0] = 0; // hardwired zero
[INFO] [stdout] ...   |
[INFO] [stdout] 303 | |             }
[INFO] [stdout] 304 | |         };
[INFO] [stdout]     | |_________^ cannot infer type
[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 `riscv_emu_rust` (lib test) due to 2 previous errors
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[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 `riscv_emu_rust` (lib) due to 2 previous errors
[INFO] running `Command { std: "docker" "inspect" "3ef2c3354862baf0bbf8968b1441c2174731c3a51a5b02eb48f50a6ccce842f1", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "3ef2c3354862baf0bbf8968b1441c2174731c3a51a5b02eb48f50a6ccce842f1", kill_on_drop: false }`
[INFO] [stdout] 3ef2c3354862baf0bbf8968b1441c2174731c3a51a5b02eb48f50a6ccce842f1