[INFO] fetching crate parse_argument 0.1.5...
[INFO] checking parse_argument-0.1.5 against master#ceab6128fa48a616bfd3e3adf4bc80133b8ee223 for no-never-type-fallback
[INFO] extracting crate parse_argument 0.1.5 into /workspace/builds/worker-2-tc1/source
[INFO] validating manifest of crates.io crate parse_argument 0.1.5 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 parse_argument 0.1.5
[INFO] finished tweaking crates.io crate parse_argument 0.1.5
[INFO] tweaked toml for crates.io crate parse_argument 0.1.5 written to /workspace/builds/worker-2-tc1/source/Cargo.toml
[INFO] crate crates.io crate parse_argument 0.1.5 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] 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@sha256:2788e3201cd34a07e3172128adcd8b3090168a8e3bcc40d7c032b9dda1df7d1c" "/opt/rustwide/cargo-home/bin/cargo" "+ceab6128fa48a616bfd3e3adf4bc80133b8ee223" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] c8382106344cb36a6201f3b1a1450a07aa4f08329b5225504991f4245c33a1e5
[INFO] running `Command { std: "docker" "start" "-a" "c8382106344cb36a6201f3b1a1450a07aa4f08329b5225504991f4245c33a1e5", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "c8382106344cb36a6201f3b1a1450a07aa4f08329b5225504991f4245c33a1e5", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "c8382106344cb36a6201f3b1a1450a07aa4f08329b5225504991f4245c33a1e5", kill_on_drop: false }`
[INFO] [stdout] c8382106344cb36a6201f3b1a1450a07aa4f08329b5225504991f4245c33a1e5
[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@sha256:2788e3201cd34a07e3172128adcd8b3090168a8e3bcc40d7c032b9dda1df7d1c" "/opt/rustwide/cargo-home/bin/cargo" "+ceab6128fa48a616bfd3e3adf4bc80133b8ee223" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 7492493c8839ba5a2a16d035f4153cd4cf882039d87fcd0a00a06fd0ffeb14f7
[INFO] running `Command { std: "docker" "start" "-a" "7492493c8839ba5a2a16d035f4153cd4cf882039d87fcd0a00a06fd0ffeb14f7", kill_on_drop: false }`
[INFO] [stderr]     Checking parse_argument v0.1.5 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 0.12s
[INFO] running `Command { std: "docker" "inspect" "7492493c8839ba5a2a16d035f4153cd4cf882039d87fcd0a00a06fd0ffeb14f7", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "7492493c8839ba5a2a16d035f4153cd4cf882039d87fcd0a00a06fd0ffeb14f7", kill_on_drop: false }`
[INFO] [stdout] 7492493c8839ba5a2a16d035f4153cd4cf882039d87fcd0a00a06fd0ffeb14f7
[INFO] checking parse_argument-0.1.5 against try#3a4bc97f6385a3aa300a4fd689b44350e54fd676 for no-never-type-fallback
[INFO] extracting crate parse_argument 0.1.5 into /workspace/builds/worker-2-tc2/source
[INFO] validating manifest of crates.io crate parse_argument 0.1.5 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 parse_argument 0.1.5
[INFO] finished tweaking crates.io crate parse_argument 0.1.5
[INFO] tweaked toml for crates.io crate parse_argument 0.1.5 written to /workspace/builds/worker-2-tc2/source/Cargo.toml
[INFO] crate crates.io crate parse_argument 0.1.5 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] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-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] 1483138b8554081bc40039d81d9c524b75d404c5f4ba94419c5e0d0c11ec5cdb
[INFO] running `Command { std: "docker" "start" "-a" "1483138b8554081bc40039d81d9c524b75d404c5f4ba94419c5e0d0c11ec5cdb", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "1483138b8554081bc40039d81d9c524b75d404c5f4ba94419c5e0d0c11ec5cdb", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "1483138b8554081bc40039d81d9c524b75d404c5f4ba94419c5e0d0c11ec5cdb", kill_on_drop: false }`
[INFO] [stdout] 1483138b8554081bc40039d81d9c524b75d404c5f4ba94419c5e0d0c11ec5cdb
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-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] 13e705c2a05b5731ea9336374ea4e89a5d8a388f3ea424f999e8e0a0be22af06
[INFO] running `Command { std: "docker" "start" "-a" "13e705c2a05b5731ea9336374ea4e89a5d8a388f3ea424f999e8e0a0be22af06", kill_on_drop: false }`
[INFO] [stderr]     Checking parse_argument v0.1.5 (/opt/rustwide/workdir)
[INFO] [stdout] error[E0282]: type annotations needed
[INFO] [stdout]  --> examples/primitives.rs:9:18
[INFO] [stdout]   |
[INFO] [stdout] 9 |         .map_err(|e| {
[INFO] [stdout]   |                  ^^^
[INFO] [stdout]   |
[INFO] [stdout] help: try giving this closure an explicit return type
[INFO] [stdout]   |
[INFO] [stdout] 9 |         .map_err(|e| -> /* Type */ {
[INFO] [stdout]   |                      +++++++++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0282]: type annotations needed
[INFO] [stdout]   --> examples/enums.rs:36:18
[INFO] [stdout]    |
[INFO] [stdout] 36 |         .map_err(|_| {
[INFO] [stdout]    |                  ^^^
[INFO] [stdout]    |
[INFO] [stdout] help: try giving this closure an explicit return type
[INFO] [stdout]    |
[INFO] [stdout] 36 |         .map_err(|_| -> /* Type */ {
[INFO] [stdout]    |                      +++++++++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0282]: type annotations needed
[INFO] [stdout]   --> examples/structs.rs:40:18
[INFO] [stdout]    |
[INFO] [stdout] 40 |         .map_err(|e| {
[INFO] [stdout]    |                  ^^^
[INFO] [stdout]    |
[INFO] [stdout] help: try giving this closure an explicit return type
[INFO] [stdout]    |
[INFO] [stdout] 40 |         .map_err(|e| -> /* Type */ {
[INFO] [stdout]    |                      +++++++++++++
[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] [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 `parse_argument` (example "primitives") due to 2 previous errors
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stderr] error: could not compile `parse_argument` (example "enums") due to 2 previous errors
[INFO] [stderr] error: could not compile `parse_argument` (example "structs") due to 2 previous errors
[INFO] running `Command { std: "docker" "inspect" "13e705c2a05b5731ea9336374ea4e89a5d8a388f3ea424f999e8e0a0be22af06", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "13e705c2a05b5731ea9336374ea4e89a5d8a388f3ea424f999e8e0a0be22af06", kill_on_drop: false }`
[INFO] [stdout] 13e705c2a05b5731ea9336374ea4e89a5d8a388f3ea424f999e8e0a0be22af06