[INFO] crate serdebug 1.0.5 is already in cache
[INFO] extracting crate serdebug 1.0.5 into work/ex/beta-1.38-1/sources/1.37.0/reg/serdebug/1.0.5
[INFO] extracting crate serdebug 1.0.5 into work/ex/beta-1.38-1/sources/beta-2019-08-13/reg/serdebug/1.0.5
[INFO] validating manifest of serdebug-1.0.5 on toolchain 1.37.0
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+1.37.0" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] validating manifest of serdebug-1.0.5 on toolchain beta-2019-08-13
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+beta-2019-08-13" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started frobbing serdebug-1.0.5
[INFO] finished frobbing serdebug-1.0.5
[INFO] frobbed toml for serdebug-1.0.5 written to work/ex/beta-1.38-1/sources/1.37.0/reg/serdebug/1.0.5/Cargo.toml
[INFO] started frobbing serdebug-1.0.5
[INFO] finished frobbing serdebug-1.0.5
[INFO] frobbed toml for serdebug-1.0.5 written to work/ex/beta-1.38-1/sources/beta-2019-08-13/reg/serdebug/1.0.5/Cargo.toml
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+1.37.0" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update"`
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+beta-2019-08-13" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update"`
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+1.37.0" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+beta-2019-08-13" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] testing serdebug-1.0.5 against 1.37.0 for beta-1.38-1
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.38-1/worker-1/1.37.0:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.38-1/sources/1.37.0/reg/serdebug/1.0.5:/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=warn" "-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" "+1.37.0" "build" "--frozen"`
[INFO] [stdout] 067773665cff8d4a17241582e84f43efb2a5d3c03155a606af22b4b4a7637b27
[INFO] running `"docker" "start" "-a" "067773665cff8d4a17241582e84f43efb2a5d3c03155a606af22b4b4a7637b27"`
[INFO] [stderr]    Compiling serdebug v1.0.5 (/opt/crater/workdir)
[INFO] [stderr]    Compiling syn v0.14.9
[INFO] [stderr]    Compiling serdebug_derive v1.0.0
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]   --> src/error.rs:43:32
[INFO] [stderr]    |
[INFO] [stderr] 43 |     fn cause(&self) -> Option<&error::Error> {
[INFO] [stderr]    |                                ^^^^^^^^^^^^ help: use `dyn`: `dyn error::Error`
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(bare_trait_objects)] on by default
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 7.70s
[INFO] running `"docker" "inspect" "067773665cff8d4a17241582e84f43efb2a5d3c03155a606af22b4b4a7637b27"`
[INFO] running `"docker" "rm" "-f" "067773665cff8d4a17241582e84f43efb2a5d3c03155a606af22b4b4a7637b27"`
[INFO] [stdout] 067773665cff8d4a17241582e84f43efb2a5d3c03155a606af22b4b4a7637b27
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.38-1/worker-1/1.37.0:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.38-1/sources/1.37.0/reg/serdebug/1.0.5:/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=warn" "-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" "+1.37.0" "test" "--frozen" "--no-run"`
[INFO] [stdout] 747f9967ff48bc66fef233c26e35c1be73201735e1b6242a0ba8092e5c5849f3
[INFO] running `"docker" "start" "-a" "747f9967ff48bc66fef233c26e35c1be73201735e1b6242a0ba8092e5c5849f3"`
[INFO] [stderr]    Compiling serdebug v1.0.5 (/opt/crater/workdir)
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]   --> src/error.rs:43:32
[INFO] [stderr]    |
[INFO] [stderr] 43 |     fn cause(&self) -> Option<&error::Error> {
[INFO] [stderr]    |                                ^^^^^^^^^^^^ help: use `dyn`: `dyn error::Error`
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(bare_trait_objects)] on by default
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 2.27s
[INFO] running `"docker" "inspect" "747f9967ff48bc66fef233c26e35c1be73201735e1b6242a0ba8092e5c5849f3"`
[INFO] running `"docker" "rm" "-f" "747f9967ff48bc66fef233c26e35c1be73201735e1b6242a0ba8092e5c5849f3"`
[INFO] [stdout] 747f9967ff48bc66fef233c26e35c1be73201735e1b6242a0ba8092e5c5849f3
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.38-1/worker-1/1.37.0:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.38-1/sources/1.37.0/reg/serdebug/1.0.5:/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=warn" "-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" "+1.37.0" "test" "--frozen"`
[INFO] [stdout] 4fb84770c469368d48bea35a27f117ce308e63fb000a3ba616af0b2d3c79738f
[INFO] running `"docker" "start" "-a" "4fb84770c469368d48bea35a27f117ce308e63fb000a3ba616af0b2d3c79738f"`
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.02s
[INFO] [stderr]      Running /opt/crater/target/debug/deps/serdebug-476721a24a2b1935
[INFO] [stderr]      Running /opt/crater/target/debug/deps/test-c73c7c9357d8f4a1
[INFO] [stdout] 
[INFO] [stdout] running 0 tests
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 0 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] running 12 tests
[INFO] [stdout] test no_fields::test_enum ... ok
[INFO] [stdout] test no_fields::test_struct ... ok
[INFO] [stdout] test named_fields::test_struct ... ok
[INFO] [stdout] test named_fields::test_enum ... ok
[INFO] [stdout] test empty_tuple_fields::test_struct ... ok
[INFO] [stdout] test empty_tuple_fields::test_enum ... ok
[INFO] [stdout] test empty_named_fields::test_struct ... ok
[INFO] [stdout] test empty_named_fields::test_enum ... ok
[INFO] [stdout] test single_tuple_field::test_enum ... ok
[INFO] [stdout] test single_tuple_field::test_struct ... ok
[INFO] [stdout] test tuple_fields::test_enum ... ok
[INFO] [stdout] test tuple_fields::test_struct ... ok
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 12 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out
[INFO] [stdout] 
[INFO] [stderr]    Doc-tests serdebug
[INFO] [stdout] 
[INFO] [stdout] running 0 tests
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 0 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out
[INFO] [stdout] 
[INFO] running `"docker" "inspect" "4fb84770c469368d48bea35a27f117ce308e63fb000a3ba616af0b2d3c79738f"`
[INFO] running `"docker" "rm" "-f" "4fb84770c469368d48bea35a27f117ce308e63fb000a3ba616af0b2d3c79738f"`
[INFO] [stdout] 4fb84770c469368d48bea35a27f117ce308e63fb000a3ba616af0b2d3c79738f