[INFO] crate walrus 0.8.0 is already in cache
[INFO] extracting crate walrus 0.8.0 into work/ex/beta-1.37-6/sources/1.36.0/reg/walrus/0.8.0
[INFO] extracting crate walrus 0.8.0 into work/ex/beta-1.37-6/sources/beta-2019-07-23/reg/walrus/0.8.0
[INFO] validating manifest of walrus-0.8.0 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 walrus-0.8.0 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 walrus-0.8.0
[INFO] finished frobbing walrus-0.8.0
[INFO] frobbed toml for walrus-0.8.0 written to work/ex/beta-1.37-6/sources/1.36.0/reg/walrus/0.8.0/Cargo.toml
[INFO] started frobbing walrus-0.8.0
[INFO] finished frobbing walrus-0.8.0
[INFO] frobbed toml for walrus-0.8.0 written to work/ex/beta-1.37-6/sources/beta-2019-07-23/reg/walrus/0.8.0/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] [stderr]     Blocking waiting for file lock on package cache lock
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+beta-2019-07-23" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] testing walrus-0.8.0 against 1.36.0 for beta-1.37-6
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.37-6/worker-4/1.36.0:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.37-6/sources/1.36.0/reg/walrus/0.8.0:/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=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" "+1.36.0" "build" "--frozen"`
[INFO] [stdout] 6daa482ea61af1c0ed9cfcb19de1e4dbfeaa58c87c59343030ffecfe9e4c61f0
[INFO] running `"docker" "start" "-a" "6daa482ea61af1c0ed9cfcb19de1e4dbfeaa58c87c59343030ffecfe9e4c61f0"`
[INFO] [stderr]    Compiling wasmparser v0.30.0
[INFO] [stderr]    Compiling leb128 v0.2.4
[INFO] [stderr]    Compiling walrus-macro v0.8.0
[INFO] [stderr]    Compiling id-arena v2.2.1
[INFO] [stderr]    Compiling walrus v0.8.0 (/opt/crater/workdir)
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 25.66s
[INFO] running `"docker" "inspect" "6daa482ea61af1c0ed9cfcb19de1e4dbfeaa58c87c59343030ffecfe9e4c61f0"`
[INFO] running `"docker" "rm" "-f" "6daa482ea61af1c0ed9cfcb19de1e4dbfeaa58c87c59343030ffecfe9e4c61f0"`
[INFO] [stdout] 6daa482ea61af1c0ed9cfcb19de1e4dbfeaa58c87c59343030ffecfe9e4c61f0
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.37-6/worker-4/1.36.0:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.37-6/sources/1.36.0/reg/walrus/0.8.0:/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=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" "+1.36.0" "test" "--frozen" "--no-run"`
[INFO] [stdout] 1d9fbb30d5aaa7e76d0ba22b90d137b26b57c1c4d29f426deb592931636a201d
[INFO] running `"docker" "start" "-a" "1d9fbb30d5aaa7e76d0ba22b90d137b26b57c1c4d29f426deb592931636a201d"`
[INFO] [stderr]    Compiling rand_xoshiro v0.1.0
[INFO] [stderr]    Compiling bstr v0.2.6
[INFO] [stderr]    Compiling env_logger v0.6.2
[INFO] [stderr]    Compiling csv v1.1.1
[INFO] [stderr]    Compiling criterion v0.2.11
[INFO] [stderr]    Compiling walrus v0.8.0 (/opt/crater/workdir)
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 31.59s
[INFO] running `"docker" "inspect" "1d9fbb30d5aaa7e76d0ba22b90d137b26b57c1c4d29f426deb592931636a201d"`
[INFO] running `"docker" "rm" "-f" "1d9fbb30d5aaa7e76d0ba22b90d137b26b57c1c4d29f426deb592931636a201d"`
[INFO] [stdout] 1d9fbb30d5aaa7e76d0ba22b90d137b26b57c1c4d29f426deb592931636a201d
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.37-6/worker-4/1.36.0:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.37-6/sources/1.36.0/reg/walrus/0.8.0:/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=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" "+1.36.0" "test" "--frozen"`
[INFO] [stdout] e89e419fe994cc954b9cd80dbc28a708785b6398ff17fbc57073c65c870fcecb
[INFO] running `"docker" "start" "-a" "e89e419fe994cc954b9cd80dbc28a708785b6398ff17fbc57073c65c870fcecb"`
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.15s
[INFO] [stderr]      Running /opt/crater/target/debug/deps/walrus-8b010ac6aae8642f
[INFO] [stdout] 
[INFO] [stdout] running 1 test
[INFO] [stdout] test tombstone_arena::tests::can_delete ... ok
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 1 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out
[INFO] [stdout] 
[INFO] [stderr]    Doc-tests walrus
[INFO] [stdout] 
[INFO] [stdout] running 3 tests
[INFO] [stdout] test src/ir/mod.rs - ir::Expr (line 112) ... ignored
[INFO] [stdout] test src/ir/mod.rs - ir::Expr (line 121) ... ignored
[INFO] [stdout] test src/function_builder.rs - function_builder::FunctionBuilder::block (line 35) ... ok
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 1 passed; 0 failed; 2 ignored; 0 measured; 0 filtered out
[INFO] [stdout] 
[INFO] running `"docker" "inspect" "e89e419fe994cc954b9cd80dbc28a708785b6398ff17fbc57073c65c870fcecb"`
[INFO] running `"docker" "rm" "-f" "e89e419fe994cc954b9cd80dbc28a708785b6398ff17fbc57073c65c870fcecb"`
[INFO] [stdout] e89e419fe994cc954b9cd80dbc28a708785b6398ff17fbc57073c65c870fcecb