[INFO] updating cached repository https://github.com/anuditnagar/rustexp
[INFO] running `"git" "-c" "credential.helper=" "-c" "credential.helper=/big/crater/work/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] dae1f10f73a7606a402c654f0de604159d99abcf
[INFO] testing anuditnagar/rustexp against beta-2019-09-28 for beta-1.39-1
[INFO] running `"git" "clone" "work/cache/git-repos/https%3A%2F%2Fgithub.com%2Fanuditnagar%2Frustexp" "work/builds/worker-6/source"`
[INFO] [stderr] Cloning into 'work/builds/worker-6/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/anuditnagar/rustexp on toolchain beta-2019-09-28
[INFO] running `"/big/crater/work/cargo-home/bin/cargo" "+beta-2019-09-28" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started tweaking git repo https://github.com/anuditnagar/rustexp
[INFO] finished tweaking git repo https://github.com/anuditnagar/rustexp
[INFO] tweaked toml for git repo https://github.com/anuditnagar/rustexp written to work/builds/worker-6/source/Cargo.toml
[INFO] crate git repo https://github.com/anuditnagar/rustexp already has a lockfile, it will not be regenerated
[INFO] running `"/big/crater/work/cargo-home/bin/cargo" "+beta-2019-09-28" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] running `"docker" "create" "-v" "/big/crater/work/builds/worker-6/target:/opt/rustwide/target:rw,Z" "-v" "/big/crater/work/builds/worker-6/source:/opt/rustwide/workdir:ro,Z" "-v" "/big/crater/work/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/big/crater/work/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "MAP_USER_ID=1000" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=warn" "-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" "+beta-2019-09-28" "build" "--frozen"`
[INFO] [stdout] 0ad1ce9cddbbda68d7d0ac833aa1a4d22220e054bbe0ca855f330afef643a48b
[INFO] running `"docker" "start" "-a" "0ad1ce9cddbbda68d7d0ac833aa1a4d22220e054bbe0ca855f330afef643a48b"`
[INFO] [stderr]    Compiling linecount v0.1.0
[INFO] [stderr]    Compiling elapsed v0.1.2
[INFO] [stderr]    Compiling rustexp v0.1.0 (/opt/rustwide/workdir)
[INFO] [stderr] error: format argument must be a string literal
[INFO] [stderr]   --> src/bin/main.rs:73:35
[INFO] [stderr]    |
[INFO] [stderr] 73 |     if let Err(e) = writeln!(file,line) {
[INFO] [stderr]    |                                   ^^^^
[INFO] [stderr] help: you might be missing a string literal to format with
[INFO] [stderr]    |
[INFO] [stderr] 73 |     if let Err(e) = writeln!(file,"{}", line) {
[INFO] [stderr]    |                                   ^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `std::io::prelude::*`
[INFO] [stderr]  --> src/bin/main.rs:7:5
[INFO] [stderr]   |
[INFO] [stderr] 7 | use std::io::prelude::*;
[INFO] [stderr]   |     ^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stderr] 
[INFO] [stderr] error[E0308]: mismatched types
[INFO] [stderr]   --> src/bin/main.rs:62:18
[INFO] [stderr]    |
[INFO] [stderr] 62 |         add_line(&line);
[INFO] [stderr]    |                  ^^^^^ expected struct `std::string::String`, found enum `std::result::Result`
[INFO] [stderr]    |
[INFO] [stderr]    = note: expected type `&std::string::String`
[INFO] [stderr]               found type `&std::result::Result<std::string::String, std::io::Error>`
[INFO] [stderr] 
[INFO] [stderr] error: aborting due to 2 previous errors
[INFO] [stderr] 
[INFO] [stderr] For more information about this error, try `rustc --explain E0308`.
[INFO] [stderr] error: could not compile `rustexp`.
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stderr] error: build failed
[INFO] running `"docker" "inspect" "0ad1ce9cddbbda68d7d0ac833aa1a4d22220e054bbe0ca855f330afef643a48b"`
[INFO] running `"docker" "rm" "-f" "0ad1ce9cddbbda68d7d0ac833aa1a4d22220e054bbe0ca855f330afef643a48b"`
[INFO] [stdout] 0ad1ce9cddbbda68d7d0ac833aa1a4d22220e054bbe0ca855f330afef643a48b