[INFO] fetching crate symcode 0.1.0...
[INFO] checking symcode-0.1.0 against master#ceab6128fa48a616bfd3e3adf4bc80133b8ee223 for no-never-type-fallback
[INFO] extracting crate symcode 0.1.0 into /workspace/builds/worker-4-tc1/source
[INFO] validating manifest of crates.io crate symcode 0.1.0 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 symcode 0.1.0
[INFO] finished tweaking crates.io crate symcode 0.1.0
[INFO] tweaked toml for crates.io crate symcode 0.1.0 written to /workspace/builds/worker-4-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 24 packages
[INFO] [stderr]       Adding flo_curves v0.3.1 (latest: v0.7.2)
[INFO] [stderr]       Adding itertools v0.8.2 (latest: v0.12.1)
[INFO] [stderr]       Adding num v0.2.1 (latest: v0.4.1)
[INFO] [stderr]       Adding num-bigint v0.2.6 (latest: v0.4.4)
[INFO] [stderr]       Adding num-complex v0.2.4 (latest: v0.4.5)
[INFO] [stderr]       Adding num-derive v0.3.3 (latest: v0.4.2)
[INFO] [stderr]       Adding num-rational v0.2.4 (latest: v0.4.1)
[INFO] [stderr]       Adding roots v0.0.6 (latest: v0.0.8)
[INFO] [stderr]       Adding syn v1.0.109 (latest: v2.0.58)
[INFO] [stderr]       Adding visioncortex v0.5.0 (latest: v0.8.8)
[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 visioncortex v0.5.0
[INFO] [stderr]   Downloaded crczoo v0.1.3
[INFO] [stderr]   Downloaded roots v0.0.6
[INFO] [stderr]   Downloaded permutator v0.4.3
[INFO] [stderr]   Downloaded flo_curves v0.3.1
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-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] 07b4eff5721d5ec501c8c2c6228a5d21d4a9966e7abd09de7e343e1e3ec90f67
[INFO] running `Command { std: "docker" "start" "-a" "07b4eff5721d5ec501c8c2c6228a5d21d4a9966e7abd09de7e343e1e3ec90f67", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "07b4eff5721d5ec501c8c2c6228a5d21d4a9966e7abd09de7e343e1e3ec90f67", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "07b4eff5721d5ec501c8c2c6228a5d21d4a9966e7abd09de7e343e1e3ec90f67", kill_on_drop: false }`
[INFO] [stdout] 07b4eff5721d5ec501c8c2c6228a5d21d4a9966e7abd09de7e343e1e3ec90f67
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-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] 1fde857ff34d1b5b2fb6c1480db07521299afb58184378d55e2ba13061c9b519
[INFO] running `Command { std: "docker" "start" "-a" "1fde857ff34d1b5b2fb6c1480db07521299afb58184378d55e2ba13061c9b519", kill_on_drop: false }`
[INFO] [stderr]    Compiling num-bigint v0.2.6
[INFO] [stderr]    Compiling num-rational v0.2.4
[INFO] [stderr]    Compiling num-complex v0.2.4
[INFO] [stderr]     Checking itertools v0.8.2
[INFO] [stderr]     Checking roots v0.0.6
[INFO] [stderr]     Checking num-iter v0.1.44
[INFO] [stderr]    Compiling syn v1.0.109
[INFO] [stderr]     Checking crczoo v0.1.3
[INFO] [stderr]     Checking flo_curves v0.3.1
[INFO] [stderr]     Checking num v0.2.1
[INFO] [stderr]     Checking permutator v0.4.3
[INFO] [stderr]     Checking visioncortex v0.5.0
[INFO] [stderr]    Compiling num-derive v0.3.3
[INFO] [stderr]     Checking symcode v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: panic message is not a string literal
[INFO] [stdout]   --> src/math.rs:67:16
[INFO] [stdout]    |
[INFO] [stdout] 67 |         panic!(format!("Not enough bits to store {}", n));
[INFO] [stdout]    |                ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: this usage of `panic!()` is deprecated; it will be a hard error in Rust 2021
[INFO] [stdout]    = note: for more information, see <https://doc.rust-lang.org/nightly/edition-guide/rust-2021/panic-macro-consistency.html>
[INFO] [stdout]    = note: the `panic!()` macro supports formatting, so there's no need for the `format!()` macro here
[INFO] [stdout]    = note: `#[warn(non_fmt_panics)]` on by default
[INFO] [stdout] help: remove the `format!(..)` macro call
[INFO] [stdout]    |
[INFO] [stdout] 67 -         panic!(format!("Not enough bits to store {}", n));
[INFO] [stdout] 67 +         panic!("Not enough bits to store {}", n);
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: panic message is not a string literal
[INFO] [stdout]   --> src/math.rs:67:16
[INFO] [stdout]    |
[INFO] [stdout] 67 |         panic!(format!("Not enough bits to store {}", n));
[INFO] [stdout]    |                ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: this usage of `panic!()` is deprecated; it will be a hard error in Rust 2021
[INFO] [stdout]    = note: for more information, see <https://doc.rust-lang.org/nightly/edition-guide/rust-2021/panic-macro-consistency.html>
[INFO] [stdout]    = note: the `panic!()` macro supports formatting, so there's no need for the `format!()` macro here
[INFO] [stdout]    = note: `#[warn(non_fmt_panics)]` on by default
[INFO] [stdout] help: remove the `format!(..)` macro call
[INFO] [stdout]    |
[INFO] [stdout] 67 -         panic!(format!("Not enough bits to store {}", n));
[INFO] [stdout] 67 +         panic!("Not enough bits to store {}", n);
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 2.03s
[INFO] running `Command { std: "docker" "inspect" "1fde857ff34d1b5b2fb6c1480db07521299afb58184378d55e2ba13061c9b519", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "1fde857ff34d1b5b2fb6c1480db07521299afb58184378d55e2ba13061c9b519", kill_on_drop: false }`
[INFO] [stdout] 1fde857ff34d1b5b2fb6c1480db07521299afb58184378d55e2ba13061c9b519
[INFO] checking symcode-0.1.0 against try#3a4bc97f6385a3aa300a4fd689b44350e54fd676 for no-never-type-fallback
[INFO] extracting crate symcode 0.1.0 into /workspace/builds/worker-4-tc2/source
[INFO] validating manifest of crates.io crate symcode 0.1.0 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 symcode 0.1.0
[INFO] finished tweaking crates.io crate symcode 0.1.0
[INFO] tweaked toml for crates.io crate symcode 0.1.0 written to /workspace/builds/worker-4-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] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-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] 32dd585cc061a54c2e1d7785582137dc87876eb48fae99265f4ba2ccaa2e4b2b
[INFO] running `Command { std: "docker" "start" "-a" "32dd585cc061a54c2e1d7785582137dc87876eb48fae99265f4ba2ccaa2e4b2b", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "32dd585cc061a54c2e1d7785582137dc87876eb48fae99265f4ba2ccaa2e4b2b", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "32dd585cc061a54c2e1d7785582137dc87876eb48fae99265f4ba2ccaa2e4b2b", kill_on_drop: false }`
[INFO] [stdout] 32dd585cc061a54c2e1d7785582137dc87876eb48fae99265f4ba2ccaa2e4b2b
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-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] b201d4c20189d84f31da95877f87aaaf9d70fb88ae4d06484331920fafc2038d
[INFO] running `Command { std: "docker" "start" "-a" "b201d4c20189d84f31da95877f87aaaf9d70fb88ae4d06484331920fafc2038d", kill_on_drop: false }`
[INFO] [stderr]    Compiling num-bigint v0.2.6
[INFO] [stderr]    Compiling num-rational v0.2.4
[INFO] [stderr]    Compiling num-complex v0.2.4
[INFO] [stderr]     Checking itertools v0.8.2
[INFO] [stderr]     Checking num-iter v0.1.44
[INFO] [stderr]     Checking roots v0.0.6
[INFO] [stderr]    Compiling syn v1.0.109
[INFO] [stderr]     Checking crczoo v0.1.3
[INFO] [stderr]     Checking flo_curves v0.3.1
[INFO] [stderr]     Checking num v0.2.1
[INFO] [stderr]     Checking permutator v0.4.3
[INFO] [stderr]     Checking visioncortex v0.5.0
[INFO] [stderr]    Compiling num-derive v0.3.3
[INFO] [stderr]     Checking symcode v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] error[E0282]: type annotations needed
[INFO] [stdout]   --> src/acute32/label.rs:78:17
[INFO] [stdout]    |
[INFO] [stdout] 78 |                 panic!();
[INFO] [stdout]    |                 ^^^^^^^^ cannot infer type
[INFO] [stdout]    |
[INFO] [stdout]    = note: this error originates in the macro `$crate::panic::panic_2015` which comes from the expansion of the macro `panic` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0282]: type annotations needed
[INFO] [stdout]   --> src/acute32/label.rs:78:17
[INFO] [stdout]    |
[INFO] [stdout] 78 |                 panic!();
[INFO] [stdout]    |                 ^^^^^^^^ cannot infer type
[INFO] [stdout]    |
[INFO] [stdout]    = note: this error originates in the macro `$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 `symcode` (lib) 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 `symcode` (lib test) due to 2 previous errors
[INFO] running `Command { std: "docker" "inspect" "b201d4c20189d84f31da95877f87aaaf9d70fb88ae4d06484331920fafc2038d", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "b201d4c20189d84f31da95877f87aaaf9d70fb88ae4d06484331920fafc2038d", kill_on_drop: false }`
[INFO] [stdout] b201d4c20189d84f31da95877f87aaaf9d70fb88ae4d06484331920fafc2038d