[INFO] fetching crate infer_schema_macros 1.4.0...
[INFO] extracting crate infer_schema_macros 1.4.0 into work/ex/pr-61874/sources/master#9f06855064ed06a50c496577b21ca50f92a2e67d/reg/infer_schema_macros/1.4.0
[INFO] extracting crate infer_schema_macros 1.4.0 into work/ex/pr-61874/sources/try#d3301713b54af69ca9de941a8c6b0d8287dbd6df/reg/infer_schema_macros/1.4.0
[INFO] validating manifest of infer_schema_macros-1.4.0 on toolchain master#9f06855064ed06a50c496577b21ca50f92a2e67d
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+9f06855064ed06a50c496577b21ca50f92a2e67d-alt" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] validating manifest of infer_schema_macros-1.4.0 on toolchain try#d3301713b54af69ca9de941a8c6b0d8287dbd6df
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+d3301713b54af69ca9de941a8c6b0d8287dbd6df-alt" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started frobbing infer_schema_macros-1.4.0
[INFO] finished frobbing infer_schema_macros-1.4.0
[INFO] frobbed toml for infer_schema_macros-1.4.0 written to work/ex/pr-61874/sources/master#9f06855064ed06a50c496577b21ca50f92a2e67d/reg/infer_schema_macros/1.4.0/Cargo.toml
[INFO] started frobbing infer_schema_macros-1.4.0
[INFO] finished frobbing infer_schema_macros-1.4.0
[INFO] frobbed toml for infer_schema_macros-1.4.0 written to work/ex/pr-61874/sources/try#d3301713b54af69ca9de941a8c6b0d8287dbd6df/reg/infer_schema_macros/1.4.0/Cargo.toml
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+9f06855064ed06a50c496577b21ca50f92a2e67d-alt" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update"`
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+d3301713b54af69ca9de941a8c6b0d8287dbd6df-alt" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update"`
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+9f06855064ed06a50c496577b21ca50f92a2e67d-alt" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] [stderr]     Blocking waiting for file lock on package cache lock
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+d3301713b54af69ca9de941a8c6b0d8287dbd6df-alt" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] checking infer_schema_macros-1.4.0 against try#d3301713b54af69ca9de941a8c6b0d8287dbd6df for pr-61874
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/pr-61874/worker-0/try#d3301713b54af69ca9de941a8c6b0d8287dbd6df:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/pr-61874/sources/try#d3301713b54af69ca9de941a8c6b0d8287dbd6df/reg/infer_schema_macros/1.4.0:/opt/crater/workdir:ro,Z" "-v" "/mnt/big/crater/work/local/cargo-home:/opt/crater/cargo-home:ro,Z" "-v" "/mnt/big/crater/work/local/rustup-home:/opt/crater/rustup-home:ro,Z" "-e" "USER_ID=1000" "-e" "SOURCE_DIR=/opt/crater/workdir" "-e" "MAP_USER_ID=1000" "-e" "CARGO_TARGET_DIR=/opt/crater/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=forbid" "-e" "CARGO_HOME=/opt/crater/cargo-home" "-e" "RUSTUP_HOME=/opt/crater/rustup-home" "-w" "/opt/crater/workdir" "-m" "1536M" "--network" "none" "rustops/crates-build-env" "/opt/crater/cargo-home/bin/cargo" "+d3301713b54af69ca9de941a8c6b0d8287dbd6df-alt" "check" "--frozen" "--all" "--all-targets"`
[INFO] [stdout] 4e0e5bc069d7c7748aac16aeaff11655877df3e83ad23ae465b039e4cfb87cf7
[INFO] running `"docker" "start" "-a" "4e0e5bc069d7c7748aac16aeaff11655877df3e83ad23ae465b039e4cfb87cf7"`
[INFO] [stderr]    Compiling syn v0.15.36
[INFO] [stderr]     Checking error-chain v0.10.0
[INFO] [stderr]     Checking syn v0.11.11
[INFO] [stderr]     Checking dotenv v0.10.1
[INFO] [stderr] error[E0659]: `error_chain` is ambiguous (derive helper attribute vs any other name)
[INFO] [stderr]   --> /opt/crater/cargo-home/registry/src/github.com-1ecc6299db9ec823/dotenv-0.10.1/src/lib.rs:23:40
[INFO] [stderr]    |
[INFO] [stderr] 23 | #[cfg_attr(not(feature = "backtrace"), error_chain(backtrace = "false"))]
[INFO] [stderr]    |                                        ^^^^^^^^^^^ ambiguous name
[INFO] [stderr]    |
[INFO] [stderr] note: `error_chain` could refer to the derive helper attribute defined here
[INFO] [stderr]   --> /opt/crater/cargo-home/registry/src/github.com-1ecc6299db9ec823/dotenv-0.10.1/src/lib.rs:22:17
[INFO] [stderr]    |
[INFO] [stderr] 22 | #[derive(Debug, error_chain)]
[INFO] [stderr]    |                 ^^^^^^^^^^^
[INFO] [stderr] note: `error_chain` could also refer to the derive macro imported here
[INFO] [stderr]   --> /opt/crater/cargo-home/registry/src/github.com-1ecc6299db9ec823/dotenv-0.10.1/src/lib.rs:10:1
[INFO] [stderr]    |
[INFO] [stderr] 10 | #[macro_use]
[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 E0659`.
[INFO] [stderr] error: Could not compile `dotenv`.
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stderr] error: build failed
[INFO] running `"docker" "inspect" "4e0e5bc069d7c7748aac16aeaff11655877df3e83ad23ae465b039e4cfb87cf7"`
[INFO] running `"docker" "rm" "-f" "4e0e5bc069d7c7748aac16aeaff11655877df3e83ad23ae465b039e4cfb87cf7"`
[INFO] [stdout] 4e0e5bc069d7c7748aac16aeaff11655877df3e83ad23ae465b039e4cfb87cf7