[INFO] fetching crate python-objects 0.0.7...
[INFO] checking python-objects-0.0.7 against master#385fa9d845dd326c6bbfd58c22244215e431948a for absurd-question-mark-desugar
[INFO] extracting crate python-objects 0.0.7 into /workspace/builds/worker-3-tc1/source
[INFO] validating manifest of crates.io crate python-objects 0.0.7 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 crates.io crate python-objects 0.0.7
[INFO] finished tweaking crates.io crate python-objects 0.0.7
[INFO] tweaked toml for crates.io crate python-objects 0.0.7 written to /workspace/builds/worker-3-tc1/source/Cargo.toml
[INFO] crate crates.io crate python-objects 0.0.7 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 ctor v0.1.21
[INFO] [stderr]   Downloaded unindent v0.1.8
[INFO] [stderr]   Downloaded color-backtrace v0.5.1
[INFO] [stderr]   Downloaded semver v1.0.6
[INFO] [stderr]   Downloaded pretty_assertions v1.1.0
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-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] a49b65d9cbf407cc9b78cb38794da917e8a315e583c9f7b1ca8210f2b6fb08b8
[INFO] running `Command { std: "docker" "start" "-a" "a49b65d9cbf407cc9b78cb38794da917e8a315e583c9f7b1ca8210f2b6fb08b8", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "a49b65d9cbf407cc9b78cb38794da917e8a315e583c9f7b1ca8210f2b6fb08b8", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "a49b65d9cbf407cc9b78cb38794da917e8a315e583c9f7b1ca8210f2b6fb08b8", kill_on_drop: false }`
[INFO] [stdout] a49b65d9cbf407cc9b78cb38794da917e8a315e583c9f7b1ca8210f2b6fb08b8
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-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] 90449ae5e1a5fa73f475999fe2618a18ca3814612f05d2e4f21d09a14c0f48da
[INFO] running `Command { std: "docker" "start" "-a" "90449ae5e1a5fa73f475999fe2618a18ca3814612f05d2e4f21d09a14c0f48da", kill_on_drop: false }`
[INFO] [stderr]    Compiling libc v0.2.119
[INFO] [stderr]    Compiling semver v1.0.6
[INFO] [stderr]    Compiling memchr v2.4.1
[INFO] [stderr]    Compiling proc-macro2 v1.0.36
[INFO] [stderr]    Compiling cc v1.0.73
[INFO] [stderr]     Checking gimli v0.26.1
[INFO] [stderr]    Compiling syn v1.0.86
[INFO] [stderr]     Checking rustc-demangle v0.1.21
[INFO] [stderr]    Compiling doc-comment v0.3.3
[INFO] [stderr]     Checking unindent v0.1.8
[INFO] [stderr]     Checking diff v0.1.12
[INFO] [stderr]    Compiling miniz_oxide v0.4.4
[INFO] [stderr]     Checking unicode-segmentation v1.9.0
[INFO] [stderr]     Checking pretty_assertions v1.1.0
[INFO] [stderr]    Compiling rustc_version v0.4.0
[INFO] [stderr]    Compiling quote v1.0.15
[INFO] [stderr]     Checking object v0.27.1
[INFO] [stderr]    Compiling rstest v0.12.0
[INFO] [stderr]    Compiling backtrace v0.3.64
[INFO] [stderr]     Checking atty v0.2.14
[INFO] [stderr]     Checking addr2line v0.17.0
[INFO] [stderr]     Checking color-backtrace v0.5.1
[INFO] [stderr]     Checking python-objects v0.0.7 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused import: `std::ops`
[INFO] [stdout]  --> examples/unicode.rs:1:5
[INFO] [stdout]   |
[INFO] [stdout] 1 | use std::ops;
[INFO] [stdout]   |     ^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `std::ops::Index`
[INFO] [stdout]  --> examples/unicode.rs:2:5
[INFO] [stdout]   |
[INFO] [stdout] 2 | use std::ops::Index;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `std::string`
[INFO] [stdout]  --> examples/unicode.rs:3:5
[INFO] [stdout]   |
[INFO] [stdout] 3 | use std::string;
[INFO] [stdout]   |     ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `color_backtrace` is imported redundantly
[INFO] [stdout]  --> examples/unicode.rs:6:5
[INFO] [stdout]   |
[INFO] [stdout] 6 | use color_backtrace;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^ the item `color_backtrace` is already defined by prelude
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `iterate_over_unicode` is never used
[INFO] [stdout]  --> examples/unicode.rs:8:4
[INFO] [stdout]   |
[INFO] [stdout] 8 | fn iterate_over_unicode() {
[INFO] [stdout]   |    ^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `string`
[INFO] [stdout]   --> examples/float_example.rs:13:9
[INFO] [stdout]    |
[INFO] [stdout] 13 |     let string = String::from("asd");
[INFO] [stdout]    |         ^^^^^^ help: if this is intentional, prefix it with an underscore: `_string`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 5 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `std::collections::HashMap`
[INFO] [stdout]  --> examples/enum_dict.rs:1:5
[INFO] [stdout]   |
[INFO] [stdout] 1 | use std::collections::HashMap;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `Int` is never constructed
[INFO] [stdout]  --> examples/enum_dict.rs:3:8
[INFO] [stdout]   |
[INFO] [stdout] 3 | struct Int {
[INFO] [stdout]   |        ^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 2 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 13.71s
[INFO] running `Command { std: "docker" "inspect" "90449ae5e1a5fa73f475999fe2618a18ca3814612f05d2e4f21d09a14c0f48da", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "90449ae5e1a5fa73f475999fe2618a18ca3814612f05d2e4f21d09a14c0f48da", kill_on_drop: false }`
[INFO] [stdout] 90449ae5e1a5fa73f475999fe2618a18ca3814612f05d2e4f21d09a14c0f48da