[INFO] crate aci_png 0.8.0-pre0 is already in cache
[INFO] extracting crate aci_png 0.8.0-pre0 into work/ex/beta-1.38-1/sources/1.37.0/reg/aci_png/0.8.0-pre0
[INFO] extracting crate aci_png 0.8.0-pre0 into work/ex/beta-1.38-1/sources/beta-2019-08-13/reg/aci_png/0.8.0-pre0
[INFO] validating manifest of aci_png-0.8.0-pre0 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 aci_png-0.8.0-pre0 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 aci_png-0.8.0-pre0
[INFO] finished frobbing aci_png-0.8.0-pre0
[INFO] frobbed toml for aci_png-0.8.0-pre0 written to work/ex/beta-1.38-1/sources/1.37.0/reg/aci_png/0.8.0-pre0/Cargo.toml
[INFO] started frobbing aci_png-0.8.0-pre0
[INFO] finished frobbing aci_png-0.8.0-pre0
[INFO] frobbed toml for aci_png-0.8.0-pre0 written to work/ex/beta-1.38-1/sources/beta-2019-08-13/reg/aci_png/0.8.0-pre0/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 aci_png-0.8.0-pre0 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-4/1.37.0:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.38-1/sources/1.37.0/reg/aci_png/0.8.0-pre0:/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] c2910582b1b09d6b88b30820a85875dbd9fe5dda84f9bf808f5fb4a7d8598352
[INFO] running `"docker" "start" "-a" "c2910582b1b09d6b88b30820a85875dbd9fe5dda84f9bf808f5fb4a7d8598352"`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]    Compiling afi v0.8.0-pre0
[INFO] [stderr]    Compiling aci_png v0.8.0-pre0 (/opt/crater/workdir)
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]    --> src/png.rs:116:29
[INFO] [stderr]     |
[INFO] [stderr] 116 |     fn cause(&self) -> Option<&std::error::Error> {
[INFO] [stderr]     |                                ^^^^^^^^^^^^^^^^^ help: use `dyn`: `dyn std::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 1.48s
[INFO] running `"docker" "inspect" "c2910582b1b09d6b88b30820a85875dbd9fe5dda84f9bf808f5fb4a7d8598352"`
[INFO] running `"docker" "rm" "-f" "c2910582b1b09d6b88b30820a85875dbd9fe5dda84f9bf808f5fb4a7d8598352"`
[INFO] [stdout] c2910582b1b09d6b88b30820a85875dbd9fe5dda84f9bf808f5fb4a7d8598352
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.38-1/worker-4/1.37.0:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.38-1/sources/1.37.0/reg/aci_png/0.8.0-pre0:/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] 7479b3256c0a2fdb9b268fe258a083ffb475c348aae53abd2e016a4c1d6bfa90
[INFO] running `"docker" "start" "-a" "7479b3256c0a2fdb9b268fe258a083ffb475c348aae53abd2e016a4c1d6bfa90"`
[INFO] [stderr]    Compiling aci_png v0.8.0-pre0 (/opt/crater/workdir)
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]    --> src/png.rs:116:29
[INFO] [stderr]     |
[INFO] [stderr] 116 |     fn cause(&self) -> Option<&std::error::Error> {
[INFO] [stderr]     |                                ^^^^^^^^^^^^^^^^^ help: use `dyn`: `dyn std::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 0.67s
[INFO] running `"docker" "inspect" "7479b3256c0a2fdb9b268fe258a083ffb475c348aae53abd2e016a4c1d6bfa90"`
[INFO] running `"docker" "rm" "-f" "7479b3256c0a2fdb9b268fe258a083ffb475c348aae53abd2e016a4c1d6bfa90"`
[INFO] [stdout] 7479b3256c0a2fdb9b268fe258a083ffb475c348aae53abd2e016a4c1d6bfa90
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.38-1/worker-4/1.37.0:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.38-1/sources/1.37.0/reg/aci_png/0.8.0-pre0:/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] 391bdfa5c2a7d7f16b0779eddc1340dd6895513d16001589158cd720f5e1250e
[INFO] running `"docker" "start" "-a" "391bdfa5c2a7d7f16b0779eddc1340dd6895513d16001589158cd720f5e1250e"`
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.01s
[INFO] [stderr]      Running /opt/crater/target/debug/deps/aci_png-ecf16fb038ad31cc
[INFO] [stderr]    Doc-tests aci_png
[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 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" "391bdfa5c2a7d7f16b0779eddc1340dd6895513d16001589158cd720f5e1250e"`
[INFO] running `"docker" "rm" "-f" "391bdfa5c2a7d7f16b0779eddc1340dd6895513d16001589158cd720f5e1250e"`
[INFO] [stdout] 391bdfa5c2a7d7f16b0779eddc1340dd6895513d16001589158cd720f5e1250e