[INFO] cloning repository https://github.com/matsune/fenek
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/matsune/fenek" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fmatsune%2Ffenek", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fmatsune%2Ffenek'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 2845000a24d26eec0a59f35d504a2eb5cedd0a53
[INFO] checking matsune/fenek against master#385fa9d845dd326c6bbfd58c22244215e431948a for absurd-question-mark-desugar
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fmatsune%2Ffenek" "/workspace/builds/worker-5-tc1/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-5-tc1/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/matsune/fenek 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/matsune/fenek
[INFO] finished tweaking git repo https://github.com/matsune/fenek
[INFO] tweaked toml for git repo https://github.com/matsune/fenek written to /workspace/builds/worker-5-tc1/source/Cargo.toml
[INFO] crate git repo https://github.com/matsune/fenek 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 git repository `https://github.com/TheDan64/inkwell`
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded llvm-sys v110.0.1
[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" "+385fa9d845dd326c6bbfd58c22244215e431948a" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] dc5e9bb74725034d68d0a8161e3121535a045e83a50bce44aa2c2306c1009ca1
[INFO] running `Command { std: "docker" "start" "-a" "dc5e9bb74725034d68d0a8161e3121535a045e83a50bce44aa2c2306c1009ca1", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "dc5e9bb74725034d68d0a8161e3121535a045e83a50bce44aa2c2306c1009ca1", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "dc5e9bb74725034d68d0a8161e3121535a045e83a50bce44aa2c2306c1009ca1", kill_on_drop: false }`
[INFO] [stdout] dc5e9bb74725034d68d0a8161e3121535a045e83a50bce44aa2c2306c1009ca1
[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" "+385fa9d845dd326c6bbfd58c22244215e431948a" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 6adc1530f4ed9d3f869cb75ddfc3d07b9d51c2efb48b873f600736fd92d2219f
[INFO] running `Command { std: "docker" "start" "-a" "6adc1530f4ed9d3f869cb75ddfc3d07b9d51c2efb48b873f600736fd92d2219f", kill_on_drop: false }`
[INFO] [stderr]    Compiling proc-macro2 v1.0.24
[INFO] [stderr]    Compiling unicode-xid v0.2.1
[INFO] [stderr]    Compiling syn v1.0.64
[INFO] [stderr]    Compiling serde_derive v1.0.125
[INFO] [stderr]    Compiling serde v1.0.125
[INFO] [stderr]    Compiling memchr v2.3.4
[INFO] [stderr]    Compiling autocfg v1.0.1
[INFO] [stderr]    Compiling ucd-trie v0.1.3
[INFO] [stderr]    Compiling libc v0.2.90
[INFO] [stderr]    Compiling pest v2.1.3
[INFO] [stderr]    Compiling paste v1.0.5
[INFO] [stderr]    Compiling version_check v0.9.3
[INFO] [stderr]    Compiling regex-syntax v0.6.23
[INFO] [stderr]     Checking typed-arena v2.0.1
[INFO] [stderr]    Compiling lazy_static v1.4.0
[INFO] [stderr]    Compiling cc v1.0.67
[INFO] [stderr]    Compiling aho-corasick v0.7.15
[INFO] [stderr]    Compiling quote v1.0.9
[INFO] [stderr]    Compiling num-traits v0.2.14
[INFO] [stderr]     Checking cfg-if v1.0.0
[INFO] [stderr]     Checking instant v0.1.9
[INFO] [stderr]    Compiling proc-macro-error-attr v1.0.4
[INFO] [stderr]    Compiling semver-parser v0.10.2
[INFO] [stderr]     Checking smallvec v1.6.1
[INFO] [stderr]     Checking scopeguard v1.1.0
[INFO] [stderr]     Checking lock_api v0.4.2
[INFO] [stderr]     Checking parking_lot_core v0.8.3
[INFO] [stderr]    Compiling proc-macro-error v1.0.4
[INFO] [stderr]    Compiling semver v0.11.0
[INFO] [stderr]    Compiling inkwell v0.1.0 (https://github.com/TheDan64/inkwell?branch=master#1c5e323d)
[INFO] [stderr]     Checking parking_lot v0.11.1
[INFO] [stderr]    Compiling indexmap v1.6.2
[INFO] [stderr]     Checking once_cell v1.7.2
[INFO] [stderr]    Compiling unicode-segmentation v1.7.1
[INFO] [stderr]    Compiling ryu v1.0.5
[INFO] [stderr]     Checking either v1.6.1
[INFO] [stderr]    Compiling bitflags v1.2.1
[INFO] [stderr]    Compiling regex v1.4.5
[INFO] [stderr]    Compiling heck v0.3.2
[INFO] [stderr]     Checking hashbrown v0.9.1
[INFO] [stderr]    Compiling serde_json v1.0.64
[INFO] [stderr]     Checking unicode-width v0.1.8
[INFO] [stderr]     Checking textwrap v0.12.1
[INFO] [stderr]     Checking atty v0.2.14
[INFO] [stderr]     Checking vec_map v0.8.2
[INFO] [stderr]     Checking strsim v0.10.0
[INFO] [stderr]     Checking termcolor v1.1.2
[INFO] [stderr]     Checking os_str_bytes v2.4.0
[INFO] [stderr]     Checking itoa v0.4.7
[INFO] [stderr]    Compiling llvm-sys v110.0.1
[INFO] [stderr]    Compiling thiserror-impl v1.0.24
[INFO] [stderr]    Compiling inkwell_internals v0.3.0 (https://github.com/TheDan64/inkwell?branch=master#1c5e323d)
[INFO] [stderr]    Compiling clap_derive v3.0.0-beta.2
[INFO] [stderr]     Checking thiserror v1.0.24
[INFO] [stderr]     Checking clap v3.0.0-beta.2
[INFO] [stderr]     Checking pos v0.1.0 (/opt/rustwide/workdir/compiler/pos)
[INFO] [stderr]     Checking error v0.1.0 (/opt/rustwide/workdir/compiler/error)
[INFO] [stderr]     Checking lex v0.1.0 (/opt/rustwide/workdir/compiler/lex)
[INFO] [stderr]     Checking types v0.1.0 (/opt/rustwide/workdir/compiler/types)
[INFO] [stdout] warning: the item `ToString` is imported redundantly
[INFO] [stdout]  --> compiler/types/src/infer.rs:3:5
[INFO] [stdout]   |
[INFO] [stdout] 3 | use std::string::ToString;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]  --> /rustc/385fa9d845dd326c6bbfd58c22244215e431948a/library/std/src/prelude/mod.rs:134:13
[INFO] [stdout]   |
[INFO] [stdout]   = note: the item `ToString` is already defined here
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `ToString` is imported redundantly
[INFO] [stdout]  --> compiler/types/src/infer.rs:3:5
[INFO] [stdout]   |
[INFO] [stdout] 3 | use std::string::ToString;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]  --> /rustc/385fa9d845dd326c6bbfd58c22244215e431948a/library/std/src/prelude/mod.rs:134:13
[INFO] [stdout]   |
[INFO] [stdout]   = note: the item `ToString` is already defined here
[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 ast v0.1.0 (/opt/rustwide/workdir/compiler/ast)
[INFO] [stdout] warning: variable `struct_A` should have a snake case name
[INFO] [stdout]    --> compiler/types/src/solver/tests.rs:196:13
[INFO] [stdout]     |
[INFO] [stdout] 196 |         let struct_A = solver.add_struct("A");
[INFO] [stdout]     |             ^^^^^^^^ help: convert the identifier to snake case: `struct_a`
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(non_snake_case)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 2 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Checking hir v0.1.0 (/opt/rustwide/workdir/compiler/hir)
[INFO] [stderr]     Checking parse v0.1.0 (/opt/rustwide/workdir/compiler/parse)
[INFO] [stderr]     Checking typeck v0.1.0 (/opt/rustwide/workdir/compiler/typeck)
[INFO] [stderr]     Checking codegen v0.1.0 (/opt/rustwide/workdir/compiler/codegen)
[INFO] [stderr]     Checking fenec v0.1.0 (/opt/rustwide/workdir/fenec)
[INFO] [stdout] warning: unused import: `std::path::Path`
[INFO] [stdout]  --> fenec/src/main.rs:8:5
[INFO] [stdout]   |
[INFO] [stdout] 8 | use std::path::Path;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `std::path::Path`
[INFO] [stdout]  --> fenec/src/main.rs:8:5
[INFO] [stdout]   |
[INFO] [stdout] 8 | use std::path::Path;
[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] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 44.74s
[INFO] running `Command { std: "docker" "inspect" "6adc1530f4ed9d3f869cb75ddfc3d07b9d51c2efb48b873f600736fd92d2219f", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "6adc1530f4ed9d3f869cb75ddfc3d07b9d51c2efb48b873f600736fd92d2219f", kill_on_drop: false }`
[INFO] [stdout] 6adc1530f4ed9d3f869cb75ddfc3d07b9d51c2efb48b873f600736fd92d2219f