[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#d7b51666469c792a8a3f40849607739bae1e705e for pr-71665
[INFO] running `"git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fcompenguy%2Fpdftext" "/workspace/builds/worker-14/source"`
[INFO] [stderr] Cloning into '/workspace/builds/worker-14/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/compenguy/pdftext on toolchain d7b51666469c792a8a3f40849607739bae1e705e
[INFO] running `"/workspace/cargo-home/bin/cargo" "+d7b51666469c792a8a3f40849607739bae1e705e" "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-14/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" "+d7b51666469c792a8a3f40849607739bae1e705e" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[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 crates.io index
[INFO] [stderr]     Updating git repository `https://github.com/s3bk/tuple`
[INFO] [stderr] error: the lock file /workspace/builds/worker-14/source/Cargo.lock needs to be updated but --locked was passed to prevent this
[INFO] [stderr] If you want to try to generate the lock file without accessing the network, use the --offline flag.
[INFO] the lockfile is outdated, regenerating it
[INFO] running `"/workspace/cargo-home/bin/cargo" "+d7b51666469c792a8a3f40849607739bae1e705e" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update"`
[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" "+d7b51666469c792a8a3f40849607739bae1e705e" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] running `"docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-14/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-14/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" "+d7b51666469c792a8a3f40849607739bae1e705e" "check" "--frozen" "--all" "--all-targets"`
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] [stdout] 2aa22d0e7a3a1fc74829383cbf777ec266c9559d719483ff272a9ed21aaa5e7f
[INFO] running `"docker" "start" "-a" "2aa22d0e7a3a1fc74829383cbf777ec266c9559d719483ff272a9ed21aaa5e7f"`
[INFO] [stderr] sudo: setrlimit(RLIMIT_CORE): Operation not permitted
[INFO] [stderr]     Checking cfg-if v0.1.10
[INFO] [stderr]    Compiling proc-macro2 v1.0.12
[INFO] [stderr]    Compiling cc v1.0.52
[INFO] [stderr]    Compiling unicode-xid v0.2.0
[INFO] [stderr]    Compiling doc-comment v0.3.3
[INFO] [stderr]    Compiling log v0.4.8
[INFO] [stderr]    Compiling encoding v0.1.0 (https://github.com/pdf-rs/encoding/#44cafed0)
[INFO] [stderr]     Checking rle-decode-fast v1.0.1
[INFO] [stderr]     Checking adler32 v1.0.4
[INFO] [stderr]     Checking take_mut v0.2.2
[INFO] [stderr]     Checking glob v0.2.11
[INFO] [stderr]     Checking md5 v0.6.1
[INFO] [stderr]     Checking ordermap v0.2.13
[INFO] [stderr]    Compiling num-integer v0.1.42
[INFO] [stderr]     Checking lock_api v0.3.4
[INFO] [stderr]     Checking itertools v0.6.5
[INFO] [stderr]     Checking crc32fast v1.2.0
[INFO] [stderr]    Compiling parking_lot v0.9.0
[INFO] [stderr]     Checking time v0.1.43
[INFO] [stderr]     Checking jpeg-decoder v0.1.19
[INFO] [stderr]     Checking num-traits v0.1.43
[INFO] [stderr]     Checking parking_lot_core v0.6.2
[INFO] [stderr]    Compiling snafu-derive v0.4.4
[INFO] [stderr]     Checking tuple v0.4.3 (https://github.com/s3bk/tuple#c1d2eef8)
[INFO] [stderr]     Checking libflate v0.1.27
[INFO] [stderr]     Checking once_cell v0.2.4
[INFO] [stderr]     Checking chrono v0.4.11
[INFO] [stderr]    Compiling backtrace-sys v0.1.37
[INFO] [stderr]    Compiling quote v1.0.4
[INFO] [stderr]    Compiling syn v1.0.19
[INFO] [stderr]     Checking backtrace v0.3.46
[INFO] [stderr]     Checking snafu v0.4.4
[INFO] [stderr]    Compiling pdf_derive v0.1.19 (https://github.com/pdf-rs/pdf/#becb5815)
[INFO] [stderr]     Checking pdf v0.7.0 (https://github.com/pdf-rs/pdf/#becb5815)
[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[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] [stderr] warning: build failed, waiting for other jobs to finish...
[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" "2aa22d0e7a3a1fc74829383cbf777ec266c9559d719483ff272a9ed21aaa5e7f"`
[INFO] running `"docker" "rm" "-f" "2aa22d0e7a3a1fc74829383cbf777ec266c9559d719483ff272a9ed21aaa5e7f"`
[INFO] [stdout] 2aa22d0e7a3a1fc74829383cbf777ec266c9559d719483ff272a9ed21aaa5e7f