[INFO] fetching crate rumqtt 0.31.0...
[INFO] testing rumqtt-0.31.0 against master#caccb4d0368bd918ef6668af8e13834d07040417 for pr-146098-1
[INFO] extracting crate rumqtt 0.31.0 into /workspace/builds/worker-4-tc1/source
[INFO] started tweaking crates.io crate rumqtt 0.31.0
[INFO] finished tweaking crates.io crate rumqtt 0.31.0
[INFO] tweaked toml for crates.io crate rumqtt 0.31.0 written to /workspace/builds/worker-4-tc1/source/Cargo.toml
[INFO] validating manifest of crates.io crate rumqtt 0.31.0 on toolchain caccb4d0368bd918ef6668af8e13834d07040417
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+caccb4d0368bd918ef6668af8e13834d07040417" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+caccb4d0368bd918ef6668af8e13834d07040417" "generate-lockfile" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Updating crates.io index
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[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+caccb4d0368bd918ef6668af8e13834d07040417" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
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[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc1/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" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--user" "0:0" "--network" "none" "ghcr.io/rust-lang/crates-build-env/linux@sha256:e90291280db7d1fac5b66fc6dad9f9662629e7365a55743daf9bdf73ebc4ea79" "/opt/rustwide/cargo-home/bin/cargo" "+caccb4d0368bd918ef6668af8e13834d07040417" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 79b549b25e2b1339d5847f6c10c20230eee898ac68e462f88f04c05eefaf7e28
[INFO] running `Command { std: "docker" "start" "-a" "79b549b25e2b1339d5847f6c10c20230eee898ac68e462f88f04c05eefaf7e28", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "79b549b25e2b1339d5847f6c10c20230eee898ac68e462f88f04c05eefaf7e28", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "79b549b25e2b1339d5847f6c10c20230eee898ac68e462f88f04c05eefaf7e28", kill_on_drop: false }`
[INFO] [stdout] 79b549b25e2b1339d5847f6c10c20230eee898ac68e462f88f04c05eefaf7e28
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc1/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" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=forbid" "-e" "RUSTDOCFLAGS=--cap-lints=forbid" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--user" "0:0" "--network" "none" "ghcr.io/rust-lang/crates-build-env/linux@sha256:e90291280db7d1fac5b66fc6dad9f9662629e7365a55743daf9bdf73ebc4ea79" "/opt/rustwide/cargo-home/bin/cargo" "+caccb4d0368bd918ef6668af8e13834d07040417" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 6312dad84d3377b9807a9f064c98795761c4c71174a485ea8e2c79b3a15d1562
[INFO] running `Command { std: "docker" "start" "-a" "6312dad84d3377b9807a9f064c98795761c4c71174a485ea8e2c79b3a15d1562", kill_on_drop: false }`
[INFO] [stderr]    Compiling autocfg v1.5.0
[INFO] [stderr]    Compiling libc v0.2.176
[INFO] [stderr]    Compiling lazy_static v1.5.0
[INFO] [stderr]    Compiling cfg-if v0.1.10
[INFO] [stderr]    Compiling maybe-uninit v2.0.0
[INFO] [stderr]    Compiling byteorder v1.5.0
[INFO] [stderr]    Compiling futures v0.1.31
[INFO] [stderr]    Compiling proc-macro2 v1.0.101
[INFO] [stderr]    Compiling semver-parser v0.7.0
[INFO] [stderr]    Compiling quote v1.0.41
[INFO] [stderr]    Compiling unicode-ident v1.0.19
[INFO] [stderr]    Compiling semver v0.9.0
[INFO] [stderr]    Compiling rand_core v0.4.2
[INFO] [stderr]    Compiling autocfg v0.1.8
[INFO] [stderr]    Compiling shlex v1.3.0
[INFO] [stderr]    Compiling find-msvc-tools v0.1.2
[INFO] [stderr]    Compiling rustc_version v0.2.3
[INFO] [stderr]    Compiling log v0.4.28
[INFO] [stderr]    Compiling scopeguard v1.2.0
[INFO] [stderr]    Compiling parking_lot_core v0.6.3
[INFO] [stderr]    Compiling crossbeam-utils v0.7.2
[INFO] [stderr]    Compiling cc v1.2.39
[INFO] [stderr]    Compiling memoffset v0.5.6
[INFO] [stderr]    Compiling rand_core v0.3.1
[INFO] [stderr]    Compiling spin v0.5.2
[INFO] [stderr]    Compiling memchr v2.7.6
[INFO] [stderr]    Compiling slab v0.4.11
[INFO] [stderr]    Compiling serde_core v1.0.228
[INFO] [stderr]    Compiling untrusted v0.6.2
[INFO] [stderr]    Compiling syn v1.0.109
[INFO] [stderr]    Compiling proc-macro2 v0.4.30
[INFO] [stderr]    Compiling crossbeam-epoch v0.8.2
[INFO] [stderr]    Compiling parking_lot v0.9.0
[INFO] [stderr]    Compiling smallvec v0.6.14
[INFO] [stderr]    Compiling object v0.37.3
[INFO] [stderr]    Compiling unicode-xid v0.1.0
[INFO] [stderr]    Compiling tokio-executor v0.1.10
[INFO] [stderr]    Compiling iovec v0.1.4
[INFO] [stderr]    Compiling net2 v0.2.39
[INFO] [stderr]    Compiling bytes v0.4.12
[INFO] [stderr]    Compiling num_cpus v1.17.0
[INFO] [stderr]    Compiling lock_api v0.3.4
[INFO] [stderr]    Compiling rand_pcg v0.1.2
[INFO] [stderr]    Compiling tokio-io v0.1.13
[INFO] [stderr]    Compiling rand_chacha v0.1.1
[INFO] [stderr]    Compiling num-traits v0.2.19
[INFO] [stderr]    Compiling gimli v0.32.3
[INFO] [stderr]    Compiling failure_derive v0.1.8
[INFO] [stderr]    Compiling serde v1.0.228
[INFO] [stderr]    Compiling syn v0.15.44
[INFO] [stderr]    Compiling adler2 v2.0.1
[INFO] [stderr]    Compiling unicode-xid v0.2.6
[INFO] [stderr]    Compiling fnv v1.0.7
[INFO] [stderr]    Compiling tokio-sync v0.1.8
[INFO] [stderr]    Compiling ring v0.14.6
[INFO] [stderr]    Compiling miniz_oxide v0.8.9
[INFO] [stdout] error[E0283]: type annotations needed
[INFO] [stdout]    --> /opt/rustwide/cargo-home/registry/src/index.crates.io-1949cf8c6b5b557f/ring-0.14.6/build.rs:475:52
[INFO] [stdout]     |
[INFO] [stdout] 475 |                 let _ = c.flag("-Wl,--gc-sections".into());
[INFO] [stdout]     |                           ----                     ^^^^
[INFO] [stdout]     |                           |
[INFO] [stdout]     |                           required by a bound introduced by this call
[INFO] [stdout]     |
[INFO] [stdout]     = note: multiple `impl`s satisfying `_: AsRef<OsStr>` found in the following crates: `find_msvc_tools`, `std`:
[INFO] [stdout]             - impl AsRef<OsStr> for OsStr;
[INFO] [stdout]             - impl AsRef<OsStr> for OsString;
[INFO] [stdout]             - impl AsRef<OsStr> for Path;
[INFO] [stdout]             - impl AsRef<OsStr> for PathBuf;
[INFO] [stdout]             - impl AsRef<OsStr> for String;
[INFO] [stdout]             - impl AsRef<OsStr> for find_msvc_tools::find_tools::Env;
[INFO] [stdout]             - impl AsRef<OsStr> for str;
[INFO] [stdout] note: required by a bound in `Build::flag`
[INFO] [stdout]    --> /opt/rustwide/cargo-home/registry/src/index.crates.io-1949cf8c6b5b557f/cc-1.2.39/src/lib.rs:652:39
[INFO] [stdout]     |
[INFO] [stdout] 652 |     pub fn flag(&mut self, flag: impl AsRef<OsStr>) -> &mut Build {
[INFO] [stdout]     |                                       ^^^^^^^^^^^^ required by this bound in `Build::flag`
[INFO] [stdout] help: try using a fully qualified path to specify the expected types
[INFO] [stdout]     |
[INFO] [stdout] 475 -                 let _ = c.flag("-Wl,--gc-sections".into());
[INFO] [stdout] 475 +                 let _ = c.flag(<&str as Into<T>>::into("-Wl,--gc-sections"));
[INFO] [stdout]     |
[INFO] [stdout] help: consider removing this method call, as the receiver has type `&'static str` and `&'static str: AsRef<OsStr>` trivially holds
[INFO] [stdout]     |
[INFO] [stdout] 475 -                 let _ = c.flag("-Wl,--gc-sections".into());
[INFO] [stdout] 475 +                 let _ = c.flag("-Wl,--gc-sections");
[INFO] [stdout]     |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0283`.
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `ring` (build script) due to 1 previous error
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] running `Command { std: "docker" "inspect" "6312dad84d3377b9807a9f064c98795761c4c71174a485ea8e2c79b3a15d1562", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "6312dad84d3377b9807a9f064c98795761c4c71174a485ea8e2c79b3a15d1562", kill_on_drop: false }`
[INFO] [stdout] 6312dad84d3377b9807a9f064c98795761c4c71174a485ea8e2c79b3a15d1562