[INFO] updating cached repository https://github.com/mozilla/fxa-email-service
[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] 27ebcbe775a3299825fadae1965649842c13339a
[INFO] checking mozilla/fxa-email-service against try#1a608893c03d7722effeb0058e82770bd36b4b3c for pr-66504-1
[INFO] running `"git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fmozilla%2Ffxa-email-service" "/workspace/builds/worker-6/source"`
[INFO] [stderr] Cloning into '/workspace/builds/worker-6/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/mozilla/fxa-email-service 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/mozilla/fxa-email-service
[INFO] finished tweaking git repo https://github.com/mozilla/fxa-email-service
[INFO] tweaked toml for git repo https://github.com/mozilla/fxa-email-service written to /workspace/builds/worker-6/source/Cargo.toml
[INFO] crate git repo https://github.com/mozilla/fxa-email-service 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]     Blocking waiting for file lock on package cache
[INFO] running `"docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6/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] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] [stdout] a4ee3f890b6f77676c4ce2c1e65d0183e0384a1339e7491766c474d13db13006
[INFO] running `"docker" "start" "-a" "a4ee3f890b6f77676c4ce2c1e65d0183e0384a1339e7491766c474d13db13006"`
[INFO] [stderr]    Compiling matches v0.1.7
[INFO] [stderr]    Compiling redis v0.9.0
[INFO] [stderr]     Checking xmlparser v0.7.0
[INFO] [stderr]     Checking quoted_printable v0.4.0
[INFO] [stderr]     Checking emailaddress v0.4.0
[INFO] [stderr]    Compiling memchr v2.1.1
[INFO] [stderr]    Compiling email v0.0.20
[INFO] [stderr]     Checking tokio-executor v0.1.3
[INFO] [stderr]    Compiling openssl-sys v0.9.39
[INFO] [stderr]     Checking crossbeam-utils v0.3.2
[INFO] [stderr]     Checking base64 v0.9.2
[INFO] [stderr]    Compiling rand v0.4.2
[INFO] [stderr]     Checking dirs v1.0.2
[INFO] [stderr]     Checking tokio-service v0.1.0
[INFO] [stderr]     Checking relay v0.1.1
[INFO] [stderr]     Checking memchr v0.1.11
[INFO] [stderr]     Checking encoding_rs v0.7.2
[INFO] [stderr]     Checking isatty v0.1.8
[INFO] [stderr]     Checking memchr v1.0.2
[INFO] [stderr]     Checking uname v0.1.1
[INFO] [stderr]    Compiling pear_codegen v0.0.20
[INFO] [stderr]    Compiling rocket v0.3.17
[INFO] [stderr]    Compiling rocket_codegen v0.3.17
[INFO] [stderr]    Compiling base64 v0.6.0
[INFO] [stderr]     Checking bytes v0.4.9
[INFO] [stderr]     Checking want v0.0.6
[INFO] [stderr]     Checking want v0.0.4
[INFO] [stderr]     Checking mio v0.6.15
[INFO] [stderr]     Checking futures-cpupool v0.1.8
[INFO] [stderr]     Checking uuid v0.6.5
[INFO] [stderr]    Compiling httparse v1.3.2
[INFO] [stderr]    Compiling unicode-bidi v0.3.4
[INFO] [stderr]    Compiling quote v0.6.5
[INFO] [stderr]     Checking aho-corasick v0.5.3
[INFO] [stderr]     Checking tokio-timer v0.2.7
[INFO] [stderr]     Checking smallvec v0.6.4
[INFO] [stderr]    Compiling lazy_static v1.1.0
[INFO] [stderr]     Checking uuid v0.7.1
[INFO] [stderr]     Checking erased-serde v0.3.5
[INFO] [stderr]     Checking serde_test v1.0.71
[INFO] [stderr]     Checking nom v3.2.1
[INFO] [stderr]     Checking roxmltree v0.3.0
[INFO] [stderr]     Checking backtrace-sys v0.1.23
[INFO] [stderr]     Checking serde_json v1.0.27
[INFO] [stderr]    Compiling rusoto_core v0.34.0
[INFO] [stderr]    Compiling sentry v0.12.0
[INFO] [stderr]     Checking crossbeam-epoch v0.4.3
[INFO] [stderr]     Checking tokio-io v0.1.7
[INFO] [stderr]     Checking http v0.1.14
[INFO] [stderr]    Compiling phf_shared v0.7.22
[INFO] [stderr] error[E0284]: type annotations needed: cannot resolve `<std::string::String as std::ops::Add<&_>>::Output == std::string::String`
[INFO] [stderr]    --> /opt/rustwide/cargo-home/registry/src/github.com-1ecc6299db9ec823/roxmltree-0.3.0/src/parse.rs:647:71
[INFO] [stderr]     |
[INFO] [stderr] 647 |                         *prev_text = Cow::Owned(prev_text.to_string() + text.borrow());
[INFO] [stderr]     |                                                                       ^
[INFO] [stderr] 
[INFO] [stderr] error: aborting due to previous error
[INFO] [stderr] 
[INFO] [stderr] For more information about this error, try `rustc --explain E0284`.
[INFO] [stderr] error: could not compile `roxmltree`.
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stderr] error: build failed
[INFO] running `"docker" "inspect" "a4ee3f890b6f77676c4ce2c1e65d0183e0384a1339e7491766c474d13db13006"`
[INFO] running `"docker" "rm" "-f" "a4ee3f890b6f77676c4ce2c1e65d0183e0384a1339e7491766c474d13db13006"`
[INFO] [stdout] a4ee3f890b6f77676c4ce2c1e65d0183e0384a1339e7491766c474d13db13006