[INFO] crate crate-race 1.1.2 is already in cache
[INFO] checking crate-race-1.1.2 against try#1a608893c03d7722effeb0058e82770bd36b4b3c for pr-66504-1
[INFO] extracting crate crate-race 1.1.2 into /workspace/builds/worker-6/source
[INFO] validating manifest of crates.io crate crate-race 1.1.2 on toolchain 1a608893c03d7722effeb0058e82770bd36b4b3c
[INFO] running `"/workspace/cargo-home/bin/cargo" "+1a608893c03d7722effeb0058e82770bd36b4b3c" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started tweaking crates.io crate crate-race 1.1.2
[INFO] finished tweaking crates.io crate crate-race 1.1.2
[INFO] tweaked toml for crates.io crate crate-race 1.1.2 written to /workspace/builds/worker-6/source/Cargo.toml
[INFO] running `"/workspace/cargo-home/bin/cargo" "+1a608893c03d7722effeb0058e82770bd36b4b3c" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update"`
[INFO] running `"/workspace/cargo-home/bin/cargo" "+1a608893c03d7722effeb0058e82770bd36b4b3c" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[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] a0d9076337e650964b024c55345b034ba8de810c35d3f88575555e0ed4a8dff1
[INFO] running `"docker" "start" "-a" "a0d9076337e650964b024c55345b034ba8de810c35d3f88575555e0ed4a8dff1"`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]    Compiling memchr v2.2.1
[INFO] [stderr]    Compiling crunchy v0.2.2
[INFO] [stderr]    Compiling ryu-ecmascript v0.1.1
[INFO] [stderr]     Checking itoa v0.4.4
[INFO] [stderr]    Compiling jetscii v0.4.4
[INFO] [stderr]     Checking unchecked-index v0.2.2
[INFO] [stderr]     Checking xmlparser v0.8.1
[INFO] [stderr]     Checking static_assertions v0.2.5
[INFO] [stderr]     Checking rustc-hex v2.0.1
[INFO] [stderr]     Checking defmac v0.1.3
[INFO] [stderr]     Checking rdxsort v0.3.0
[INFO] [stderr]     Checking json v0.11.15
[INFO] [stderr]     Checking afsort v0.3.1
[INFO] [stderr]     Checking quick_sort v0.2.1
[INFO] [stderr]     Checking cycle-sort v0.2.0
[INFO] [stderr]     Checking rust_quicksort v0.1.0
[INFO] [stderr]     Checking dummy_xml v0.1.6
[INFO] [stderr]     Checking dmsort v1.0.0
[INFO] [stderr]     Checking ironsort v0.1.0
[INFO] [stderr]     Checking simple_csv v0.0.15
[INFO] [stderr]     Checking quick-csv v0.1.6
[INFO] [stderr]     Checking xml-rs v0.4.1
[INFO] [stderr]     Checking galil-seiferas v0.1.5
[INFO] [stderr]     Checking regex-automata v0.1.8
[INFO] [stderr]    Compiling vek v0.9.11
[INFO] [stderr]     Checking xml-rs v0.7.0
[INFO] [stderr]     Checking block-buffer v0.7.3
[INFO] [stderr]     Checking serde_json v1.0.44
[INFO] [stderr]     Checking num-bigint v0.2.3
[INFO] [stderr]     Checking alga v0.7.2
[INFO] [stderr]    Compiling pest_generator v2.1.1
[INFO] [stderr]    Compiling numext-constructor v0.1.4
[INFO] [stderr]     Checking md-5 v0.8.0
[INFO] [stderr]     Checking rulinalg v0.4.2
[INFO] [stderr]     Checking sortrs v0.0.5
[INFO] [stderr]     Checking treexml v0.7.0
[INFO] [stderr]     Checking roxmltree v0.4.1
[INFO] [stderr]     Checking uint v0.5.0
[INFO] [stderr]     Checking nv-xml v0.1.3
[INFO] [stderr]     Checking json_in_type v1.1.1
[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-0.4.1/src/parse.rs:690:71
[INFO] [stderr]     |
[INFO] [stderr] 690 |                         *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" "a0d9076337e650964b024c55345b034ba8de810c35d3f88575555e0ed4a8dff1"`
[INFO] running `"docker" "rm" "-f" "a0d9076337e650964b024c55345b034ba8de810c35d3f88575555e0ed4a8dff1"`
[INFO] [stdout] a0d9076337e650964b024c55345b034ba8de810c35d3f88575555e0ed4a8dff1