[INFO] cloning repository https://github.com/nrabulinski/prosper
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/nrabulinski/prosper" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fnrabulinski%2Fprosper", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fnrabulinski%2Fprosper'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 102aba6f3a9cd6211231536bbc1f78b1781fb647
[INFO] testing nrabulinski/prosper against 1.55.0 for beta-1.56-1
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fnrabulinski%2Fprosper" "/workspace/builds/worker-76/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-76/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/nrabulinski/prosper on toolchain 1.55.0
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.55.0" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/nrabulinski/prosper
[INFO] finished tweaking git repo https://github.com/nrabulinski/prosper
[INFO] tweaked toml for git repo https://github.com/nrabulinski/prosper written to /workspace/builds/worker-76/source/Cargo.toml
[INFO] crate git repo https://github.com/nrabulinski/prosper already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.55.0" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded llvm-sys v100.1.1
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-76/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-76/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:a89201d6b5b9fd45c15d5952ece0a0129e7e80cb26ec023fd59cf09bc26f1604" "/opt/rustwide/cargo-home/bin/cargo" "+1.55.0" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] ddffe7b063c95b738fbfddfca8ed484cf2d760ea9d6eb28b74d2d3fa5202be4e
[INFO] running `Command { std: "docker" "start" "-a" "ddffe7b063c95b738fbfddfca8ed484cf2d760ea9d6eb28b74d2d3fa5202be4e", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "ddffe7b063c95b738fbfddfca8ed484cf2d760ea9d6eb28b74d2d3fa5202be4e", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "ddffe7b063c95b738fbfddfca8ed484cf2d760ea9d6eb28b74d2d3fa5202be4e", kill_on_drop: false }`
[INFO] [stdout] ddffe7b063c95b738fbfddfca8ed484cf2d760ea9d6eb28b74d2d3fa5202be4e
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-76/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-76/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=warn" "-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:a89201d6b5b9fd45c15d5952ece0a0129e7e80cb26ec023fd59cf09bc26f1604" "/opt/rustwide/cargo-home/bin/cargo" "+1.55.0" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 45d2134f716fb3cbf85bcae9402eca1273b623c734753a8f1b616ab3222dacc7
[INFO] running `Command { std: "docker" "start" "-a" "45d2134f716fb3cbf85bcae9402eca1273b623c734753a8f1b616ab3222dacc7", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]    Compiling regex-syntax v0.6.18
[INFO] [stderr]    Compiling semver-parser v0.7.0
[INFO] [stderr]    Compiling libc v0.2.74
[INFO] [stderr]    Compiling syn v1.0.38
[INFO] [stderr]    Compiling cc v1.0.59
[INFO] [stderr]    Compiling smallvec v1.4.2
[INFO] [stderr]    Compiling scopeguard v1.1.0
[INFO] [stderr]    Compiling inkwell v0.1.0 (https://github.com/TheDan64/inkwell?branch=llvm10-0#79070d9f)
[INFO] [stderr]    Compiling either v1.6.0
[INFO] [stderr]    Compiling once_cell v1.4.1
[INFO] [stderr]    Compiling memchr v2.3.3
[INFO] [stderr]    Compiling proc-macro2 v1.0.19
[INFO] [stderr]    Compiling lock_api v0.4.1
[INFO] [stderr]    Compiling semver v0.9.0
[INFO] [stderr]    Compiling quote v1.0.7
[INFO] [stderr]    Compiling aho-corasick v0.7.13
[INFO] [stderr]    Compiling parking_lot_core v0.8.0
[INFO] [stderr]    Compiling parking_lot v0.11.0
[INFO] [stderr]    Compiling regex v1.3.9
[INFO] [stderr]    Compiling llvm-sys v100.1.1
[INFO] [stderr]    Compiling inkwell_internals v0.2.0 (https://github.com/TheDan64/inkwell?branch=llvm10-0#79070d9f)
[INFO] [stderr]    Compiling prmacros v0.1.0 (/opt/rustwide/workdir/prmacros)
[INFO] [stdout] warning: unused imports: `format_ident`, `quote_spanned`
[INFO] [stdout]  --> prmacros/src/lib.rs:3:13
[INFO] [stdout]   |
[INFO] [stdout] 3 | use quote::{format_ident, quote, quote_spanned, ToTokens};
[INFO] [stdout]   |             ^^^^^^^^^^^^         ^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused imports: `ItemEnum`, `PatTupleStruct`, `spanned::Spanned`
[INFO] [stdout]  --> prmacros/src/lib.rs:5:24
[INFO] [stdout]   |
[INFO] [stdout] 5 |     parse_macro_input, spanned::Spanned, ItemEnum, Path,
[INFO] [stdout]   |                        ^^^^^^^^^^^^^^^^  ^^^^^^^^
[INFO] [stdout] 6 |     LitStr, PatTupleStruct, Pat, Token,
[INFO] [stdout]   |             ^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 2 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]    Compiling prparse v0.1.0 (/opt/rustwide/workdir/prparse)
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the stable release channel
[INFO] [stdout]  --> prparse/src/lib.rs:1:1
[INFO] [stdout]   |
[INFO] [stdout] 1 | #![feature(or_patterns, type_alias_impl_trait, drain_filter, box_patterns, bindings_after_at)]
[INFO] [stdout]   | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = help: the feature `or_patterns` has been stable since 1.53.0 and no longer requires an attribute to enable
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the feature `type_alias_impl_trait` is incomplete and may not be safe to use and/or cause compiler crashes
[INFO] [stdout]  --> prparse/src/lib.rs:1:25
[INFO] [stdout]   |
[INFO] [stdout] 1 | #![feature(or_patterns, type_alias_impl_trait, drain_filter, box_patterns, bindings_after_at)]
[INFO] [stdout]   |                         ^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(incomplete_features)]` on by default
[INFO] [stdout]   = note: see issue #63063 <https://github.com/rust-lang/rust/issues/63063> for more information
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `std::borrow::Cow`
[INFO] [stdout]  --> prparse/src/validate/mod.rs:5:5
[INFO] [stdout]   |
[INFO] [stdout] 5 | use std::borrow::Cow;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused imports: `AnyValueEnum`, `AnyValue`
[INFO] [stdout]  --> prparse/src/codegen.rs:7:23
[INFO] [stdout]   |
[INFO] [stdout] 7 | use inkwell::values::{AnyValue, AnyValueEnum, BasicValueEnum, BasicValue, FunctionValue, PointerValue};
[INFO] [stdout]   |                       ^^^^^^^^  ^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `std::convert::TryFrom`
[INFO] [stdout]   --> prparse/src/codegen.rs:13:5
[INFO] [stdout]    |
[INFO] [stdout] 13 | use std::convert::TryFrom;
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `std::cell::RefCell`
[INFO] [stdout]   --> prparse/src/codegen.rs:17:5
[INFO] [stdout]    |
[INFO] [stdout] 17 | use std::cell::RefCell;
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `std::rc::Rc`
[INFO] [stdout]   --> prparse/src/codegen.rs:18:5
[INFO] [stdout]    |
[INFO] [stdout] 18 | use std::rc::Rc;
[INFO] [stdout]    |     ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to previous error; 6 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0554`.
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `prparse` due to 2 previous errors; 6 warnings emitted
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stderr] error: build failed
[INFO] running `Command { std: "docker" "inspect" "45d2134f716fb3cbf85bcae9402eca1273b623c734753a8f1b616ab3222dacc7", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "45d2134f716fb3cbf85bcae9402eca1273b623c734753a8f1b616ab3222dacc7", kill_on_drop: false }`
[INFO] [stdout] 45d2134f716fb3cbf85bcae9402eca1273b623c734753a8f1b616ab3222dacc7