[INFO] fetching crate safe_math 0.1.1...
[INFO] checking safe_math-0.1.1 against master#ceab6128fa48a616bfd3e3adf4bc80133b8ee223 for no-never-type-fallback
[INFO] extracting crate safe_math 0.1.1 into /workspace/builds/worker-5-tc1/source
[INFO] validating manifest of crates.io crate safe_math 0.1.1 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 safe_math 0.1.1
[INFO] finished tweaking crates.io crate safe_math 0.1.1
[INFO] tweaked toml for crates.io crate safe_math 0.1.1 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] [stderr]     Blocking waiting for file lock on package cache
[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]     Blocking waiting for file lock on package cache
[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] 950694cccc71aed3099d621aec96108121ab749939f0584307962dab780f85e4
[INFO] running `Command { std: "docker" "start" "-a" "950694cccc71aed3099d621aec96108121ab749939f0584307962dab780f85e4", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "950694cccc71aed3099d621aec96108121ab749939f0584307962dab780f85e4", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "950694cccc71aed3099d621aec96108121ab749939f0584307962dab780f85e4", kill_on_drop: false }`
[INFO] [stdout] 950694cccc71aed3099d621aec96108121ab749939f0584307962dab780f85e4
[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] 60d191225c3fa8f0d213ffae9af458e808ce4d7b3a3390f02d7597f7938ade2a
[INFO] running `Command { std: "docker" "start" "-a" "60d191225c3fa8f0d213ffae9af458e808ce4d7b3a3390f02d7597f7938ade2a", kill_on_drop: false }`
[INFO] [stderr]     Checking safe_math v0.1.1 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 0.04s
[INFO] running `Command { std: "docker" "inspect" "60d191225c3fa8f0d213ffae9af458e808ce4d7b3a3390f02d7597f7938ade2a", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "60d191225c3fa8f0d213ffae9af458e808ce4d7b3a3390f02d7597f7938ade2a", kill_on_drop: false }`
[INFO] [stdout] 60d191225c3fa8f0d213ffae9af458e808ce4d7b3a3390f02d7597f7938ade2a
[INFO] checking safe_math-0.1.1 against try#3a4bc97f6385a3aa300a4fd689b44350e54fd676 for no-never-type-fallback
[INFO] extracting crate safe_math 0.1.1 into /workspace/builds/worker-5-tc2/source
[INFO] validating manifest of crates.io crate safe_math 0.1.1 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 safe_math 0.1.1
[INFO] finished tweaking crates.io crate safe_math 0.1.1
[INFO] tweaked toml for crates.io crate safe_math 0.1.1 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] [stderr]     Blocking waiting for file lock on package cache
[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] 64b12a998e05e16530b686d268db78e709580581b800d234942442fe65607a7e
[INFO] running `Command { std: "docker" "start" "-a" "64b12a998e05e16530b686d268db78e709580581b800d234942442fe65607a7e", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "64b12a998e05e16530b686d268db78e709580581b800d234942442fe65607a7e", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "64b12a998e05e16530b686d268db78e709580581b800d234942442fe65607a7e", kill_on_drop: false }`
[INFO] [stdout] 64b12a998e05e16530b686d268db78e709580581b800d234942442fe65607a7e
[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] 3f4053bee6b2b87e98dec6c7448698d01270178148db366456b038b3e23f4cbe
[INFO] running `Command { std: "docker" "start" "-a" "3f4053bee6b2b87e98dec6c7448698d01270178148db366456b038b3e23f4cbe", kill_on_drop: false }`
[INFO] [stderr]     Checking safe_math v0.1.1 (/opt/rustwide/workdir)
[INFO] [stdout] error[E0282]: type annotations needed
[INFO] [stdout]   --> src/safe_operations.rs:8:5
[INFO] [stdout]    |
[INFO] [stdout] 8  | /     match result {
[INFO] [stdout] 9  | |         Ok(v) => return Ok(v),
[INFO] [stdout] 10 | |         Err(_) => return Err(in_y)
[INFO] [stdout] 11 | |     };
[INFO] [stdout]    | |_____^ cannot infer type
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0282]: type annotations needed
[INFO] [stdout]   --> src/safe_operations.rs:8:5
[INFO] [stdout]    |
[INFO] [stdout] 8  | /     match result {
[INFO] [stdout] 9  | |         Ok(v) => return Ok(v),
[INFO] [stdout] 10 | |         Err(_) => return Err(in_y)
[INFO] [stdout] 11 | |     };
[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] [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 `safe_math` (lib) due to 2 previous errors
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stderr] error: could not compile `safe_math` (lib test) due to 2 previous errors
[INFO] running `Command { std: "docker" "inspect" "3f4053bee6b2b87e98dec6c7448698d01270178148db366456b038b3e23f4cbe", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "3f4053bee6b2b87e98dec6c7448698d01270178148db366456b038b3e23f4cbe", kill_on_drop: false }`
[INFO] [stdout] 3f4053bee6b2b87e98dec6c7448698d01270178148db366456b038b3e23f4cbe