[INFO] fetching crate mongodb-helper 0.1.6...
[INFO] checking mongodb-helper-0.1.6 against try#b09a3e9a7a0ff7efb269ec0c13dcc0fd3cedcf6b for pr-82781
[INFO] extracting crate mongodb-helper 0.1.6 into /workspace/builds/worker-10/source
[INFO] validating manifest of crates.io crate mongodb-helper 0.1.6 on toolchain b09a3e9a7a0ff7efb269ec0c13dcc0fd3cedcf6b
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+b09a3e9a7a0ff7efb269ec0c13dcc0fd3cedcf6b" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate mongodb-helper 0.1.6
[INFO] finished tweaking crates.io crate mongodb-helper 0.1.6
[INFO] tweaked toml for crates.io crate mongodb-helper 0.1.6 written to /workspace/builds/worker-10/source/Cargo.toml
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+b09a3e9a7a0ff7efb269ec0c13dcc0fd3cedcf6b" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update", kill_on_drop: false }`
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+b09a3e9a7a0ff7efb269ec0c13dcc0fd3cedcf6b" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded derivative v1.0.4
[INFO] [stderr]   Downloaded typed-builder v0.3.0
[INFO] [stderr]   Downloaded os_info v1.3.3
[INFO] [stderr]   Downloaded mongodb v0.9.2
[INFO] [stderr]   Downloaded r2d2-mongodb v0.2.2
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-10/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-10/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" "rustops/crates-build-env@sha256:f2f6bcd4b43ebee4e173f653a26493129bdb64017c85f916b780ca7fbdbaa79d" "/opt/rustwide/cargo-home/bin/cargo" "+b09a3e9a7a0ff7efb269ec0c13dcc0fd3cedcf6b" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 0f0fa4db3cfb53e05f31b9f5acd59d4da19d74470794a373c0d0ababa8f9ac11
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] running `Command { std: "docker" "start" "-a" "0f0fa4db3cfb53e05f31b9f5acd59d4da19d74470794a373c0d0ababa8f9ac11", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "0f0fa4db3cfb53e05f31b9f5acd59d4da19d74470794a373c0d0ababa8f9ac11", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "0f0fa4db3cfb53e05f31b9f5acd59d4da19d74470794a373c0d0ababa8f9ac11", kill_on_drop: false }`
[INFO] [stdout] 0f0fa4db3cfb53e05f31b9f5acd59d4da19d74470794a373c0d0ababa8f9ac11
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-10/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-10/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" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--user" "0:0" "--network" "none" "rustops/crates-build-env@sha256:f2f6bcd4b43ebee4e173f653a26493129bdb64017c85f916b780ca7fbdbaa79d" "/opt/rustwide/cargo-home/bin/cargo" "+b09a3e9a7a0ff7efb269ec0c13dcc0fd3cedcf6b" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 7687ec182077a3b403e011b40a489a487cfb2c95be39ff5c094ce2f01b659f26
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] running `Command { std: "docker" "start" "-a" "7687ec182077a3b403e011b40a489a487cfb2c95be39ff5c094ce2f01b659f26", kill_on_drop: false }`
[INFO] [stderr]    Compiling libc v0.2.89
[INFO] [stderr]    Compiling typenum v1.13.0
[INFO] [stderr]     Checking cfg-if v1.0.0
[INFO] [stderr]     Checking rand_core v0.4.2
[INFO] [stderr]    Compiling cc v1.0.67
[INFO] [stderr]     Checking byteorder v1.4.3
[INFO] [stderr]    Compiling memchr v2.3.4
[INFO] [stderr]    Compiling serde_derive v1.0.124
[INFO] [stderr]    Compiling autocfg v0.1.7
[INFO] [stderr]    Compiling log v0.4.14
[INFO] [stderr]    Compiling serde v1.0.124
[INFO] [stderr]     Checking once_cell v1.7.2
[INFO] [stderr]     Checking fake-simd v0.1.2
[INFO] [stderr]    Compiling version_check v0.9.3
[INFO] [stderr]     Checking matches v0.1.8
[INFO] [stderr]     Checking hashbrown v0.9.1
[INFO] [stderr]     Checking arrayref v0.3.6
[INFO] [stderr]    Compiling proc-macro2 v0.4.30
[INFO] [stderr]     Checking byte-tools v0.2.0
[INFO] [stderr]    Compiling serde_json v1.0.64
[INFO] [stderr]     Checking byte-tools v0.3.1
[INFO] [stderr]     Checking cfg-if v0.1.10
[INFO] [stderr]    Compiling unicode-xid v0.1.0
[INFO] [stderr]    Compiling fnv v1.0.7
[INFO] [stderr]    Compiling ident_case v1.0.1
[INFO] [stderr]    Compiling bitflags v1.2.1
[INFO] [stderr]     Checking ppv-lite86 v0.2.10
[INFO] [stderr]    Compiling syn v0.15.44
[INFO] [stderr]     Checking constant_time_eq v0.1.5
[INFO] [stderr]     Checking pin-utils v0.1.0
[INFO] [stderr]    Compiling unicode-segmentation v1.7.1
[INFO] [stderr]     Checking hex v0.3.2
[INFO] [stderr]     Checking gimli v0.23.0
[INFO] [stderr]     Checking opaque-debug v0.2.3
[INFO] [stderr]     Checking adler v1.0.2
[INFO] [stderr]     Checking percent-encoding v2.1.0
[INFO] [stderr]     Checking match_cfg v0.1.0
[INFO] [stderr]     Checking utf8-ranges v1.0.4
[INFO] [stderr]    Compiling openssl v0.10.33
[INFO] [stderr]     Checking bytes v0.5.6
[INFO] [stderr]     Checking object v0.23.0
[INFO] [stderr]     Checking rustc-demangle v0.1.18
[INFO] [stderr]     Checking subtle v1.0.0
[INFO] [stderr]    Compiling os_info v1.3.3
[INFO] [stderr]     Checking quick-error v1.2.3
[INFO] [stderr]     Checking try_from v0.2.2
[INFO] [stderr]     Checking md5 v0.3.8
[INFO] [stderr]     Checking regex-syntax v0.6.23
[INFO] [stderr]     Checking bufstream v0.1.4
[INFO] [stderr]     Checking data-encoding v2.3.2
[INFO] [stderr]     Checking separator v0.3.1
[INFO] [stderr]     Checking md5 v0.6.1
[INFO] [stdout] error[E0034]: multiple applicable items in scope
[INFO] [stdout]    --> /opt/rustwide/cargo-home/registry/src/github.com-1ecc6299db9ec823/try_from-0.2.2/src/char.rs:46:28
[INFO] [stdout]     |
[INFO] [stdout] 46  |                 match u32::try_from(n)? {
[INFO] [stdout]     |                            ^^^^^^^^ multiple `try_from` found
[INFO] [stdout] ...
[INFO] [stdout] 58  | impl_int_to_char!(i8, i16, i32, i64, isize, u16, u32, u64, usize);
[INFO] [stdout]     | ------------------------------------------------------------------ in this macro invocation
[INFO] [stdout]     |
[INFO] [stdout] note: candidate #1 is defined in the trait `TryFrom`
[INFO] [stdout]    --> /opt/rustwide/cargo-home/registry/src/github.com-1ecc6299db9ec823/try_from-0.2.2/src/lib.rs:11:5
[INFO] [stdout]     |
[INFO] [stdout] 11  |     fn try_from(T) -> Result<Self, Self::Err>;
[INFO] [stdout]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] note: candidate #2 is defined in the trait `std::convert::TryFrom`
[INFO] [stdout]     = note: this error originates in a macro (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] help: disambiguate the associated function for candidate #1
[INFO] [stdout]     |
[INFO] [stdout] 46  |                 match TryFrom::try_from(n)? {
[INFO] [stdout]     |                       ^^^^^^^^^^^^^^^^^
[INFO] [stdout] help: disambiguate the associated function for candidate #2
[INFO] [stdout]     |
[INFO] [stdout] 46  |                 match std::convert::TryFrom::try_from(n)? {
[INFO] [stdout]     |                       ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to previous error
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0034`.
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `try_from`
[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: build failed
[INFO] running `Command { std: "docker" "inspect" "7687ec182077a3b403e011b40a489a487cfb2c95be39ff5c094ce2f01b659f26", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "7687ec182077a3b403e011b40a489a487cfb2c95be39ff5c094ce2f01b659f26", kill_on_drop: false }`
[INFO] [stdout] 7687ec182077a3b403e011b40a489a487cfb2c95be39ff5c094ce2f01b659f26