[INFO] fetching crate qr-label-generator 0.1.0...
[INFO] testing qr-label-generator-0.1.0 against 1.91.0 for beta-1.92-2
[INFO] extracting crate qr-label-generator 0.1.0 into /workspace/builds/worker-0-tc1/source
[INFO] started tweaking crates.io crate qr-label-generator 0.1.0
[INFO] removed 0 missing examples
[INFO] finished tweaking crates.io crate qr-label-generator 0.1.0
[INFO] tweaked toml for crates.io crate qr-label-generator 0.1.0 written to /workspace/builds/worker-0-tc1/source/Cargo.toml
[INFO] validating manifest of crates.io crate qr-label-generator 0.1.0 on toolchain 1.91.0
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+1.91.0" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate crates.io crate qr-label-generator 0.1.0 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" "+1.91.0" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
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[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-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@sha256:4848fb76d95f26979359cc7e45710b1dbc8f3acb7aeedee7c460d7702230f228" "/opt/rustwide/cargo-home/bin/cargo" "+1.91.0" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 8d6b3fba7ac70c9c6495602817302a8767257e12c90787b2f6d9f41d10594a23
[INFO] running `Command { std: "docker" "start" "-a" "8d6b3fba7ac70c9c6495602817302a8767257e12c90787b2f6d9f41d10594a23", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "8d6b3fba7ac70c9c6495602817302a8767257e12c90787b2f6d9f41d10594a23", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "8d6b3fba7ac70c9c6495602817302a8767257e12c90787b2f6d9f41d10594a23", kill_on_drop: false }`
[INFO] [stdout] 8d6b3fba7ac70c9c6495602817302a8767257e12c90787b2f6d9f41d10594a23
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-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=warn" "-e" "RUSTDOCFLAGS=--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@sha256:4848fb76d95f26979359cc7e45710b1dbc8f3acb7aeedee7c460d7702230f228" "/opt/rustwide/cargo-home/bin/cargo" "+1.91.0" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 5f2be71a9a3812e051aa2b624448905c7dd7496fa0043d19bc20b269c883a7e3
[INFO] running `Command { std: "docker" "start" "-a" "5f2be71a9a3812e051aa2b624448905c7dd7496fa0043d19bc20b269c883a7e3", kill_on_drop: false }`
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[INFO] [stderr]    Compiling qr-label-generator v0.1.0 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 40.86s
[INFO] running `Command { std: "docker" "inspect" "5f2be71a9a3812e051aa2b624448905c7dd7496fa0043d19bc20b269c883a7e3", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "5f2be71a9a3812e051aa2b624448905c7dd7496fa0043d19bc20b269c883a7e3", kill_on_drop: false }`
[INFO] [stdout] 5f2be71a9a3812e051aa2b624448905c7dd7496fa0043d19bc20b269c883a7e3
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-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=warn" "-e" "RUSTDOCFLAGS=--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@sha256:4848fb76d95f26979359cc7e45710b1dbc8f3acb7aeedee7c460d7702230f228" "/opt/rustwide/cargo-home/bin/cargo" "+1.91.0" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] bb5ac1d2ded8ef58627c8adae2a29737c8817914e65580011e7a496f790cbd38
[INFO] running `Command { std: "docker" "start" "-a" "bb5ac1d2ded8ef58627c8adae2a29737c8817914e65580011e7a496f790cbd38", kill_on_drop: false }`
[INFO] [stderr]    Compiling qr-label-generator v0.1.0 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished `test` profile [unoptimized + debuginfo] target(s) in 2.45s
[INFO] running `Command { std: "docker" "inspect" "bb5ac1d2ded8ef58627c8adae2a29737c8817914e65580011e7a496f790cbd38", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "bb5ac1d2ded8ef58627c8adae2a29737c8817914e65580011e7a496f790cbd38", kill_on_drop: false }`
[INFO] [stdout] bb5ac1d2ded8ef58627c8adae2a29737c8817914e65580011e7a496f790cbd38
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-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=warn" "-e" "RUSTDOCFLAGS=--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@sha256:4848fb76d95f26979359cc7e45710b1dbc8f3acb7aeedee7c460d7702230f228" "/opt/rustwide/cargo-home/bin/cargo" "+1.91.0" "test" "--frozen", kill_on_drop: false }`
[INFO] [stdout] 592673e9ccae2888a853eaadcf8c0a65d3e190e0e486b0b5f699953bdd16477d
[INFO] running `Command { std: "docker" "start" "-a" "592673e9ccae2888a853eaadcf8c0a65d3e190e0e486b0b5f699953bdd16477d", kill_on_drop: false }`
[INFO] [stderr]     Finished `test` profile [unoptimized + debuginfo] target(s) in 0.08s
[INFO] [stderr]      Running unittests src/lib.rs (/opt/rustwide/target/debug/deps/qr_label_generator-487c1e8efb279402)
[INFO] [stdout] 
[INFO] [stdout] running 0 tests
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 0 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.00s
[INFO] [stdout] 
[INFO] [stderr]    Doc-tests qr_label_generator
[INFO] [stdout] 
[INFO] [stdout] running 1 test
[INFO] [stdout] test src/qr.rs - qr::QrGenerator::generate_single (line 67) ... FAILED
[INFO] [stdout] 
[INFO] [stdout] failures:
[INFO] [stdout] 
[INFO] [stdout] ---- src/qr.rs - qr::QrGenerator::generate_single (line 67) stdout ----
[INFO] [stdout] error[E0277]: the `?` operator can only be used in a function that returns `Result` or `Option` (or another type that implements `FromResidual`)
[INFO] [stdout]  --> src/qr.rs:71:58
[INFO] [stdout]   |
[INFO] [stdout] 4 | fn main() { #[allow(non_snake_case)] fn _doctest_main_src_qr_rs_67_0() {
[INFO] [stdout]   |                                      --------------------------------- this function should return `Result` or `Option` to accept `?`
[INFO] [stdout] ...
[INFO] [stdout] 7 | gen.generate_single("https://example.com", "qr.png", 300)?;
[INFO] [stdout]   |                                                          ^ cannot use the `?` operator in a function that returns `()`
[INFO] [stdout]   |
[INFO] [stdout] help: consider adding return type
[INFO] [stdout]   |
[INFO] [stdout] 4 ~ fn main() { #[allow(non_snake_case)] fn _doctest_main_src_qr_rs_67_0() -> Result<(), Box<dyn std::error::Error>> {
[INFO] [stdout] 5 | use qr_label_generator::QrGenerator;
[INFO] [stdout] 6 | let gen = QrGenerator::new();
[INFO] [stdout] 7 | gen.generate_single("https://example.com", "qr.png", 300)?;
[INFO] [stdout] 8 +     Ok(())
[INFO] [stdout]   |
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to 1 previous error
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0277`.
[INFO] [stdout] Couldn't compile the test.
[INFO] [stdout] 
[INFO] [stdout] failures:
[INFO] [stdout]     src/qr.rs - qr::QrGenerator::generate_single (line 67)
[INFO] [stdout] 
[INFO] [stdout] test result: FAILED. 0 passed; 1 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.12s
[INFO] [stdout] 
[INFO] [stderr] error: doctest failed, to rerun pass `--doc`
[INFO] running `Command { std: "docker" "inspect" "592673e9ccae2888a853eaadcf8c0a65d3e190e0e486b0b5f699953bdd16477d", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "592673e9ccae2888a853eaadcf8c0a65d3e190e0e486b0b5f699953bdd16477d", kill_on_drop: false }`
[INFO] [stdout] 592673e9ccae2888a853eaadcf8c0a65d3e190e0e486b0b5f699953bdd16477d