[INFO] crate snmp 0.2.2 is already in cache
[INFO] extracting crate snmp 0.2.2 into work/ex/beta-1.37-6/sources/1.36.0/reg/snmp/0.2.2
[INFO] extracting crate snmp 0.2.2 into work/ex/beta-1.37-6/sources/beta-2019-07-23/reg/snmp/0.2.2
[INFO] validating manifest of snmp-0.2.2 on toolchain 1.36.0
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+1.36.0" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] validating manifest of snmp-0.2.2 on toolchain beta-2019-07-23
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+beta-2019-07-23" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started frobbing snmp-0.2.2
[INFO] finished frobbing snmp-0.2.2
[INFO] frobbed toml for snmp-0.2.2 written to work/ex/beta-1.37-6/sources/1.36.0/reg/snmp/0.2.2/Cargo.toml
[INFO] started frobbing snmp-0.2.2
[INFO] finished frobbing snmp-0.2.2
[INFO] frobbed toml for snmp-0.2.2 written to work/ex/beta-1.37-6/sources/beta-2019-07-23/reg/snmp/0.2.2/Cargo.toml
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+1.36.0" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update"`
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+beta-2019-07-23" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update"`
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+1.36.0" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+beta-2019-07-23" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] testing snmp-0.2.2 against beta-2019-07-23 for beta-1.37-6
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.37-6/worker-4/beta-2019-07-23:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.37-6/sources/beta-2019-07-23/reg/snmp/0.2.2:/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" "+beta-2019-07-23" "build" "--frozen"`
[INFO] [stdout] a816f8f2f44ade1e1c30d74333ba50f7be6731fadc004c61247f487b367f5f03
[INFO] running `"docker" "start" "-a" "a816f8f2f44ade1e1c30d74333ba50f7be6731fadc004c61247f487b367f5f03"`
[INFO] [stderr]    Compiling snmp v0.2.2 (/opt/crater/workdir)
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]    --> src/lib.rs:348:21
[INFO] [stderr]     |
[INFO] [stderr] 348 |                 let mut wbuf = self.available();
[INFO] [stderr]     |                     ----^^^^
[INFO] [stderr]     |                     |
[INFO] [stderr]     |                     help: remove this `mut`
[INFO] [stderr]     |
[INFO] [stderr]     = note: #[warn(unused_mut)] on by default
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 1.25s
[INFO] running `"docker" "inspect" "a816f8f2f44ade1e1c30d74333ba50f7be6731fadc004c61247f487b367f5f03"`
[INFO] running `"docker" "rm" "-f" "a816f8f2f44ade1e1c30d74333ba50f7be6731fadc004c61247f487b367f5f03"`
[INFO] [stdout] a816f8f2f44ade1e1c30d74333ba50f7be6731fadc004c61247f487b367f5f03
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.37-6/worker-4/beta-2019-07-23:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.37-6/sources/beta-2019-07-23/reg/snmp/0.2.2:/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" "+beta-2019-07-23" "test" "--frozen" "--no-run"`
[INFO] [stdout] 1fc34dd9f2f15ae64a697932867b41c5536a5964bde82a20f192cb85d8beabe7
[INFO] running `"docker" "start" "-a" "1fc34dd9f2f15ae64a697932867b41c5536a5964bde82a20f192cb85d8beabe7"`
[INFO] [stderr]    Compiling snmp v0.2.2 (/opt/crater/workdir)
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]    --> src/lib.rs:348:21
[INFO] [stderr]     |
[INFO] [stderr] 348 |                 let mut wbuf = self.available();
[INFO] [stderr]     |                     ----^^^^
[INFO] [stderr]     |                     |
[INFO] [stderr]     |                     help: remove this `mut`
[INFO] [stderr]     |
[INFO] [stderr]     = note: #[warn(unused_mut)] on by default
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 1.60s
[INFO] running `"docker" "inspect" "1fc34dd9f2f15ae64a697932867b41c5536a5964bde82a20f192cb85d8beabe7"`
[INFO] running `"docker" "rm" "-f" "1fc34dd9f2f15ae64a697932867b41c5536a5964bde82a20f192cb85d8beabe7"`
[INFO] [stdout] 1fc34dd9f2f15ae64a697932867b41c5536a5964bde82a20f192cb85d8beabe7
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.37-6/worker-4/beta-2019-07-23:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.37-6/sources/beta-2019-07-23/reg/snmp/0.2.2:/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" "+beta-2019-07-23" "test" "--frozen"`
[INFO] [stdout] a2e756e9d052f646004bf888862475d083b419d091290f4e1574737cbe93b0df
[INFO] running `"docker" "start" "-a" "a2e756e9d052f646004bf888862475d083b419d091290f4e1574737cbe93b0df"`
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.03s
[INFO] [stderr]      Running /opt/crater/target/debug/deps/snmp-e2c1cef9592b39eb
[INFO] [stderr]    Doc-tests snmp
[INFO] [stdout] 
[INFO] [stdout] running 3 tests
[INFO] [stdout] test tests::asn_parse_getnext_pdu ... ok
[INFO] [stdout] test tests::build_getnext_pdu ... ok
[INFO] [stdout] test tests::asn_read_byte ... ok
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 3 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] running 3 tests
[INFO] [stdout] test src/lib.rs -  (line 56) ... ok
[INFO] [stdout] test src/lib.rs -  (line 40) ... ok
[INFO] [stdout] test src/lib.rs -  (line 75) ... ok
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 3 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out
[INFO] [stdout] 
[INFO] running `"docker" "inspect" "a2e756e9d052f646004bf888862475d083b419d091290f4e1574737cbe93b0df"`
[INFO] running `"docker" "rm" "-f" "a2e756e9d052f646004bf888862475d083b419d091290f4e1574737cbe93b0df"`
[INFO] [stdout] a2e756e9d052f646004bf888862475d083b419d091290f4e1574737cbe93b0df