[INFO] cloning repository https://github.com/cfallin/isle
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/cfallin/isle" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fcfallin%2Fisle", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fcfallin%2Fisle'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] fb582977fc70911e06f3ef460087dffe6120665f
[INFO] checking cfallin/isle against master#385fa9d845dd326c6bbfd58c22244215e431948a for never-type-fallback-to-never
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fcfallin%2Fisle" "/workspace/builds/worker-6-tc1/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-6-tc1/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/cfallin/isle on toolchain 385fa9d845dd326c6bbfd58c22244215e431948a
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+385fa9d845dd326c6bbfd58c22244215e431948a" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/cfallin/isle
[INFO] finished tweaking git repo https://github.com/cfallin/isle
[INFO] tweaked toml for git repo https://github.com/cfallin/isle written to /workspace/builds/worker-6-tc1/source/Cargo.toml
[INFO] crate git repo https://github.com/cfallin/isle 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" "+385fa9d845dd326c6bbfd58c22244215e431948a" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Updating crates.io index
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded supports-color v1.1.1
[INFO] [stderr]   Downloaded owo-colors v2.1.0
[INFO] [stderr]   Downloaded miette-derive v3.0.1
[INFO] [stderr]   Downloaded arbitrary v1.0.2
[INFO] [stderr]   Downloaded miette v3.0.1
[INFO] [stderr]   Downloaded libfuzzer-sys v0.4.2
[INFO] [stderr]   Downloaded syn v1.0.77
[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" "+385fa9d845dd326c6bbfd58c22244215e431948a" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 8f8c69fdd838ae77ef84ce82e588b8c8b964349e49eb8a0dea87146deb59807a
[INFO] running `Command { std: "docker" "start" "-a" "8f8c69fdd838ae77ef84ce82e588b8c8b964349e49eb8a0dea87146deb59807a", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "8f8c69fdd838ae77ef84ce82e588b8c8b964349e49eb8a0dea87146deb59807a", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "8f8c69fdd838ae77ef84ce82e588b8c8b964349e49eb8a0dea87146deb59807a", kill_on_drop: false }`
[INFO] [stdout] 8f8c69fdd838ae77ef84ce82e588b8c8b964349e49eb8a0dea87146deb59807a
[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" "+385fa9d845dd326c6bbfd58c22244215e431948a" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 9c7d8805aad5485d54b2c0ec79c8aaabdd68c2313b5a6e4e5bf025f4271bb7db
[INFO] running `Command { std: "docker" "start" "-a" "9c7d8805aad5485d54b2c0ec79c8aaabdd68c2313b5a6e4e5bf025f4271bb7db", kill_on_drop: false }`
[INFO] [stderr]    Compiling proc-macro2 v1.0.29
[INFO] [stderr]    Compiling libc v0.2.101
[INFO] [stderr]    Compiling syn v1.0.77
[INFO] [stderr]    Compiling cc v1.0.70
[INFO] [stderr]    Compiling memchr v2.4.1
[INFO] [stderr]    Compiling miniz_oxide v0.4.4
[INFO] [stderr]    Compiling log v0.4.14
[INFO] [stderr]     Checking gimli v0.25.0
[INFO] [stderr]     Checking rustc-demangle v0.1.21
[INFO] [stderr]    Compiling aho-corasick v0.7.18
[INFO] [stderr]     Checking object v0.26.2
[INFO] [stderr]     Checking once_cell v1.8.0
[INFO] [stderr]     Checking is_ci v1.1.1
[INFO] [stderr]    Compiling quote v1.0.9
[INFO] [stderr]     Checking smawk v0.3.1
[INFO] [stderr]    Compiling backtrace v0.3.61
[INFO] [stderr]    Compiling proc-macro-error-attr v1.0.4
[INFO] [stderr]     Checking atty v0.2.14
[INFO] [stderr]     Checking supports-color v1.1.1
[INFO] [stderr]     Checking supports-unicode v1.0.2
[INFO] [stderr]     Checking supports-hyperlinks v1.2.0
[INFO] [stderr]     Checking term_size v0.3.2
[INFO] [stderr]     Checking owo-colors v2.1.0
[INFO] [stderr]    Compiling proc-macro-error v1.0.4
[INFO] [stderr]    Compiling unicode-segmentation v1.8.0
[INFO] [stderr]    Compiling heck v0.3.3
[INFO] [stderr]    Compiling libfuzzer-sys v0.4.2
[INFO] [stderr]     Checking clap v2.33.3
[INFO] [stderr]    Compiling regex v1.5.4
[INFO] [stderr]     Checking arbitrary v1.0.2
[INFO] [stderr]     Checking addr2line v0.16.0
[INFO] [stderr]     Checking env_logger v0.8.4
[INFO] [stderr]     Checking env_logger v0.9.0
[INFO] [stderr]    Compiling unicode-linebreak v0.1.2
[INFO] [stderr]    Compiling thiserror-impl v1.0.29
[INFO] [stderr]    Compiling miette-derive v3.0.1
[INFO] [stderr]    Compiling structopt-derive v0.4.16
[INFO] [stderr]     Checking textwrap v0.14.2
[INFO] [stderr]     Checking thiserror v1.0.29
[INFO] [stderr]     Checking miette v3.0.1
[INFO] [stderr]     Checking structopt v0.3.23
[INFO] [stderr]     Checking isle v0.1.0 (/opt/rustwide/workdir/isle)
[INFO] [stdout] warning: the item `Pos` is imported redundantly
[INFO] [stdout]     --> isle/src/sema.rs:1839:31
[INFO] [stdout]      |
[INFO] [stdout] 1837 |     use super::*;
[INFO] [stdout]      |         -------- the item `Pos` is already imported here
[INFO] [stdout] 1838 |     use crate::ast::Ident;
[INFO] [stdout] 1839 |     use crate::lexer::{Lexer, Pos};
[INFO] [stdout]      |                               ^^^
[INFO] [stdout]      |
[INFO] [stdout]      = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Checking islec v0.1.0 (/opt/rustwide/workdir/islec)
[INFO] [stderr]     Checking isle-fuzz v0.0.0 (/opt/rustwide/workdir/fuzz)
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 48.84s
[INFO] running `Command { std: "docker" "inspect" "9c7d8805aad5485d54b2c0ec79c8aaabdd68c2313b5a6e4e5bf025f4271bb7db", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "9c7d8805aad5485d54b2c0ec79c8aaabdd68c2313b5a6e4e5bf025f4271bb7db", kill_on_drop: false }`
[INFO] [stdout] 9c7d8805aad5485d54b2c0ec79c8aaabdd68c2313b5a6e4e5bf025f4271bb7db
[INFO] checking cfallin/isle against try#2d84f2737f3bd9ebfcb07f75aa198d6cf7c715d2 for never-type-fallback-to-never
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fcfallin%2Fisle" "/workspace/builds/worker-6-tc2/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-6-tc2/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/cfallin/isle on toolchain 2d84f2737f3bd9ebfcb07f75aa198d6cf7c715d2
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+2d84f2737f3bd9ebfcb07f75aa198d6cf7c715d2" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/cfallin/isle
[INFO] finished tweaking git repo https://github.com/cfallin/isle
[INFO] tweaked toml for git repo https://github.com/cfallin/isle written to /workspace/builds/worker-6-tc2/source/Cargo.toml
[INFO] crate git repo https://github.com/cfallin/isle 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" "+2d84f2737f3bd9ebfcb07f75aa198d6cf7c715d2" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[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" "+2d84f2737f3bd9ebfcb07f75aa198d6cf7c715d2" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] eb4891651d6498ad6c1d32efb519390fc0b0b3643ff286e1bc261abdbd11e459
[INFO] running `Command { std: "docker" "start" "-a" "eb4891651d6498ad6c1d32efb519390fc0b0b3643ff286e1bc261abdbd11e459", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "eb4891651d6498ad6c1d32efb519390fc0b0b3643ff286e1bc261abdbd11e459", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "eb4891651d6498ad6c1d32efb519390fc0b0b3643ff286e1bc261abdbd11e459", kill_on_drop: false }`
[INFO] [stdout] eb4891651d6498ad6c1d32efb519390fc0b0b3643ff286e1bc261abdbd11e459
[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" "+2d84f2737f3bd9ebfcb07f75aa198d6cf7c715d2" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] b33a63457ecde709b2af0ed429a94219f1abb5bacd371bb40ae0e0ee2f725dc4
[INFO] running `Command { std: "docker" "start" "-a" "b33a63457ecde709b2af0ed429a94219f1abb5bacd371bb40ae0e0ee2f725dc4", kill_on_drop: false }`
[INFO] [stderr]    Compiling proc-macro2 v1.0.29
[INFO] [stderr]    Compiling memchr v2.4.1
[INFO] [stderr]    Compiling libc v0.2.101
[INFO] [stderr]    Compiling syn v1.0.77
[INFO] [stderr]    Compiling cc v1.0.70
[INFO] [stderr]    Compiling log v0.4.14
[INFO] [stderr]    Compiling miniz_oxide v0.4.4
[INFO] [stderr]     Checking gimli v0.25.0
[INFO] [stderr]     Checking object v0.26.2
[INFO] [stderr]     Checking rustc-demangle v0.1.21
[INFO] [stderr]    Compiling aho-corasick v0.7.18
[INFO] [stderr]     Checking is_ci v1.1.1
[INFO] [stderr]     Checking smawk v0.3.1
[INFO] [stderr]     Checking once_cell v1.8.0
[INFO] [stderr]     Checking atty v0.2.14
[INFO] [stderr]    Compiling quote v1.0.9
[INFO] [stderr]     Checking term_size v0.3.2
[INFO] [stderr]    Compiling proc-macro-error-attr v1.0.4
[INFO] [stderr]     Checking supports-color v1.1.1
[INFO] [stderr]     Checking supports-unicode v1.0.2
[INFO] [stderr]     Checking supports-hyperlinks v1.2.0
[INFO] [stderr]     Checking owo-colors v2.1.0
[INFO] [stderr]    Compiling backtrace v0.3.61
[INFO] [stderr]    Compiling proc-macro-error v1.0.4
[INFO] [stderr]    Compiling unicode-segmentation v1.8.0
[INFO] [stderr]    Compiling libfuzzer-sys v0.4.2
[INFO] [stderr]    Compiling regex v1.5.4
[INFO] [stderr]    Compiling heck v0.3.3
[INFO] [stderr]     Checking clap v2.33.3
[INFO] [stderr]     Checking arbitrary v1.0.2
[INFO] [stderr]     Checking env_logger v0.8.4
[INFO] [stderr]     Checking addr2line v0.16.0
[INFO] [stderr]     Checking env_logger v0.9.0
[INFO] [stderr]    Compiling unicode-linebreak v0.1.2
[INFO] [stderr]    Compiling thiserror-impl v1.0.29
[INFO] [stderr]    Compiling miette-derive v3.0.1
[INFO] [stderr]    Compiling structopt-derive v0.4.16
[INFO] [stderr]     Checking textwrap v0.14.2
[INFO] [stderr]     Checking thiserror v1.0.29
[INFO] [stderr]     Checking miette v3.0.1
[INFO] [stderr]     Checking structopt v0.3.23
[INFO] [stderr]     Checking isle v0.1.0 (/opt/rustwide/workdir/isle)
[INFO] [stdout] warning: the item `Pos` is imported redundantly
[INFO] [stdout]     --> isle/src/sema.rs:1839:31
[INFO] [stdout]      |
[INFO] [stdout] 1837 |     use super::*;
[INFO] [stdout]      |         -------- the item `Pos` is already imported here
[INFO] [stdout] 1838 |     use crate::ast::Ident;
[INFO] [stdout] 1839 |     use crate::lexer::{Lexer, Pos};
[INFO] [stdout]      |                               ^^^
[INFO] [stdout]      |
[INFO] [stdout]      = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Checking islec v0.1.0 (/opt/rustwide/workdir/islec)
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Checking isle-fuzz v0.0.0 (/opt/rustwide/workdir/fuzz)
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 49.55s
[INFO] running `Command { std: "docker" "inspect" "b33a63457ecde709b2af0ed429a94219f1abb5bacd371bb40ae0e0ee2f725dc4", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "b33a63457ecde709b2af0ed429a94219f1abb5bacd371bb40ae0e0ee2f725dc4", kill_on_drop: false }`
[INFO] [stdout] b33a63457ecde709b2af0ed429a94219f1abb5bacd371bb40ae0e0ee2f725dc4