[INFO] crate stamm 0.2.0 is already in cache
[INFO] extracting crate stamm 0.2.0 into work/ex/beta-1.37-6/sources/1.36.0/reg/stamm/0.2.0
[INFO] extracting crate stamm 0.2.0 into work/ex/beta-1.37-6/sources/beta-2019-07-23/reg/stamm/0.2.0
[INFO] validating manifest of stamm-0.2.0 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 stamm-0.2.0 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 stamm-0.2.0
[INFO] finished frobbing stamm-0.2.0
[INFO] frobbed toml for stamm-0.2.0 written to work/ex/beta-1.37-6/sources/1.36.0/reg/stamm/0.2.0/Cargo.toml
[INFO] started frobbing stamm-0.2.0
[INFO] finished frobbing stamm-0.2.0
[INFO] frobbed toml for stamm-0.2.0 written to work/ex/beta-1.37-6/sources/beta-2019-07-23/reg/stamm/0.2.0/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] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+beta-2019-07-23" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] testing stamm-0.2.0 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-6/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/stamm/0.2.0:/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" "+beta-2019-07-23" "build" "--frozen"`
[INFO] [stdout] 048c0b107bd309fb7b06935ff1accf071ea6d2fe99729dd4ceb8984409f2704d
[INFO] running `"docker" "start" "-a" "048c0b107bd309fb7b06935ff1accf071ea6d2fe99729dd4ceb8984409f2704d"`
[INFO] [stderr]    Compiling stamm v0.2.0 (/opt/crater/workdir)
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 2.08s
[INFO] running `"docker" "inspect" "048c0b107bd309fb7b06935ff1accf071ea6d2fe99729dd4ceb8984409f2704d"`
[INFO] running `"docker" "rm" "-f" "048c0b107bd309fb7b06935ff1accf071ea6d2fe99729dd4ceb8984409f2704d"`
[INFO] [stdout] 048c0b107bd309fb7b06935ff1accf071ea6d2fe99729dd4ceb8984409f2704d
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.37-6/worker-6/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/stamm/0.2.0:/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" "+beta-2019-07-23" "test" "--frozen" "--no-run"`
[INFO] [stdout] fb35a2228b9128a2fb254614dd11b49b80d300c7e3369e93cecc85c778361c06
[INFO] running `"docker" "start" "-a" "fb35a2228b9128a2fb254614dd11b49b80d300c7e3369e93cecc85c778361c06"`
[INFO] [stderr]    Compiling stamm v0.2.0 (/opt/crater/workdir)
[INFO] [stderr] warning: the item `Write` is imported redundantly
[INFO] [stderr]   --> examples/numeric_tree_example.rs:14:9
[INFO] [stderr]    |
[INFO] [stderr] 7  | use std::io::{stdin, stdout, Write};
[INFO] [stderr]    |                              ----- the item `Write` is already imported here
[INFO] [stderr] ...
[INFO] [stderr] 14 |     use std::io::Write;
[INFO] [stderr]    |         ^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(unused_imports)] on by default
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 3.06s
[INFO] running `"docker" "inspect" "fb35a2228b9128a2fb254614dd11b49b80d300c7e3369e93cecc85c778361c06"`
[INFO] running `"docker" "rm" "-f" "fb35a2228b9128a2fb254614dd11b49b80d300c7e3369e93cecc85c778361c06"`
[INFO] [stdout] fb35a2228b9128a2fb254614dd11b49b80d300c7e3369e93cecc85c778361c06
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.37-6/worker-6/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/stamm/0.2.0:/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" "+beta-2019-07-23" "test" "--frozen"`
[INFO] [stdout] 7c91700b8e6b18cfa77cef89bcaf583f69e5d518b16e229e371f506233503a92
[INFO] running `"docker" "start" "-a" "7c91700b8e6b18cfa77cef89bcaf583f69e5d518b16e229e371f506233503a92"`
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.03s
[INFO] [stderr]      Running /opt/crater/target/debug/deps/stamm-79d183aaee2ff24d
[INFO] [stdout] 
[INFO] [stderr]    Doc-tests stamm
[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" "7c91700b8e6b18cfa77cef89bcaf583f69e5d518b16e229e371f506233503a92"`
[INFO] running `"docker" "rm" "-f" "7c91700b8e6b18cfa77cef89bcaf583f69e5d518b16e229e371f506233503a92"`
[INFO] [stdout] 7c91700b8e6b18cfa77cef89bcaf583f69e5d518b16e229e371f506233503a92