[INFO] updating cached repository https://github.com/compenguy/pdftext
[INFO] running `"git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "-c" "remote.origin.fetch=refs/heads/*:refs/heads/*" "fetch" "origin" "--force" "--prune"`
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] a15270e57dd7a93abfcc1efe039896caf5125391
[INFO] checking compenguy/pdftext against try#1a608893c03d7722effeb0058e82770bd36b4b3c for pr-66504-1
[INFO] running `"git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fcompenguy%2Fpdftext" "/workspace/builds/worker-7/source"`
[INFO] [stderr] Cloning into '/workspace/builds/worker-7/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/compenguy/pdftext on toolchain 1a608893c03d7722effeb0058e82770bd36b4b3c
[INFO] running `"/workspace/cargo-home/bin/cargo" "+1a608893c03d7722effeb0058e82770bd36b4b3c" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started tweaking git repo https://github.com/compenguy/pdftext
[INFO] finished tweaking git repo https://github.com/compenguy/pdftext
[INFO] tweaked toml for git repo https://github.com/compenguy/pdftext written to /workspace/builds/worker-7/source/Cargo.toml
[INFO] crate git repo https://github.com/compenguy/pdftext already has a lockfile, it will not be regenerated
[INFO] running `"/workspace/cargo-home/bin/cargo" "+1a608893c03d7722effeb0058e82770bd36b4b3c" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] [stderr]     Updating git repository `https://github.com/pdf-rs/pdf/`
[INFO] [stderr]     Updating git repository `https://github.com/pdf-rs/encoding/`
[INFO] [stderr]     Updating crates.io index
[INFO] [stderr]     Updating git repository `https://github.com/s3bk/tuple`
[INFO] [stderr] error: the lock file /workspace/builds/worker-7/source/Cargo.lock needs to be updated but --locked was passed to prevent this
[INFO] the lockfile is outdated, regenerating it
[INFO] running `"/workspace/cargo-home/bin/cargo" "+1a608893c03d7722effeb0058e82770bd36b4b3c" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update"`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Updating git repository `https://github.com/pdf-rs/pdf/`
[INFO] [stderr]     Updating git repository `https://github.com/pdf-rs/encoding/`
[INFO] [stderr]     Updating git repository `https://github.com/s3bk/tuple`
[INFO] running `"/workspace/cargo-home/bin/cargo" "+1a608893c03d7722effeb0058e82770bd36b4b3c" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `"docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7/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" "MAP_USER_ID=0" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=forbid" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--network" "none" "rustops/crates-build-env" "/opt/rustwide/cargo-home/bin/cargo" "+1a608893c03d7722effeb0058e82770bd36b4b3c" "check" "--frozen" "--all" "--all-targets"`
[INFO] [stdout] 5efa9de9838ab68960c58848fd2629a8e832c67c712a17f7719177877e838a27
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] running `"docker" "start" "-a" "5efa9de9838ab68960c58848fd2629a8e832c67c712a17f7719177877e838a27"`
[INFO] [stderr]    Compiling proc-macro2 v1.0.6
[INFO] [stderr]    Compiling syn v1.0.11
[INFO] [stderr]    Compiling doc-comment v0.3.1
[INFO] [stderr]    Compiling encoding v0.1.0 (https://github.com/pdf-rs/encoding/#44cafed0)
[INFO] [stderr]     Checking ordermap v0.2.13
[INFO] [stderr]     Checking md5 v0.6.1
[INFO] [stderr]     Checking getrandom v0.1.13
[INFO] [stderr]    Compiling parking_lot v0.9.0
[INFO] [stderr]     Checking isatty v0.1.9
[INFO] [stderr]     Checking memmap v0.7.0
[INFO] [stderr]    Compiling syn v0.15.44
[INFO] [stderr]     Checking num-integer v0.1.41
[INFO] [stderr]     Checking parking_lot_core v0.6.2
[INFO] [stderr]     Checking tuple v0.4.3 (https://github.com/s3bk/tuple#c1d2eef8)
[INFO] [stderr]     Checking rand_core v0.5.1
[INFO] [stderr]     Checking chrono v0.4.10
[INFO] [stderr]     Checking rand_chacha v0.2.1
[INFO] [stderr]     Checking rand v0.7.2
[INFO] [stderr]     Checking once_cell v0.2.4
[INFO] [stderr]    Compiling quote v1.0.2
[INFO] [stderr]     Checking tempfile v3.1.0
[INFO] [stderr]    Compiling snafu-derive v0.4.4
[INFO] [stderr]    Compiling pdf_derive v0.1.19 (https://github.com/pdf-rs/pdf/#72545440)
[INFO] [stderr]     Checking snafu v0.4.4
[INFO] [stderr]     Checking pdf v0.7.0 (https://github.com/pdf-rs/pdf/#72545440)
[INFO] [stderr]     Checking pdftext v0.1.1 (/opt/rustwide/workdir)
[INFO] [stderr] error[E0277]: the `?` operator can only be applied to values that implement `std::ops::Try`
[INFO] [stderr]   --> src/main.rs:19:42
[INFO] [stderr]    |
[INFO] [stderr] 19 |     println!("\nDocument has {} pages.", pdf.num_pages()?);
[INFO] [stderr]    |                                          ^^^^^^^^^^^^^^^^ the `?` operator cannot be applied to type `u32`
[INFO] [stderr]    |
[INFO] [stderr]    = help: the trait `std::ops::Try` is not implemented for `u32`
[INFO] [stderr]    = note: required by `std::ops::Try::into_result`
[INFO] [stderr] 
[INFO] [stderr] error: aborting due to previous error
[INFO] [stderr] 
[INFO] [stderr] For more information about this error, try `rustc --explain E0277`.
[INFO] [stderr] error: could not compile `pdftext`.
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stderr] error[E0277]: the `?` operator can only be applied to values that implement `std::ops::Try`
[INFO] [stderr]   --> src/main.rs:19:42
[INFO] [stderr]    |
[INFO] [stderr] 19 |     println!("\nDocument has {} pages.", pdf.num_pages()?);
[INFO] [stderr]    |                                          ^^^^^^^^^^^^^^^^ the `?` operator cannot be applied to type `u32`
[INFO] [stderr]    |
[INFO] [stderr]    = help: the trait `std::ops::Try` is not implemented for `u32`
[INFO] [stderr]    = note: required by `std::ops::Try::into_result`
[INFO] [stderr] 
[INFO] [stderr] error: aborting due to previous error
[INFO] [stderr] 
[INFO] [stderr] For more information about this error, try `rustc --explain E0277`.
[INFO] [stderr] error: could not compile `pdftext`.
[INFO] [stderr] 
[INFO] [stderr] To learn more, run the command again with --verbose.
[INFO] running `"docker" "inspect" "5efa9de9838ab68960c58848fd2629a8e832c67c712a17f7719177877e838a27"`
[INFO] running `"docker" "rm" "-f" "5efa9de9838ab68960c58848fd2629a8e832c67c712a17f7719177877e838a27"`
[INFO] [stdout] 5efa9de9838ab68960c58848fd2629a8e832c67c712a17f7719177877e838a27