[INFO] updating cached repository chr4/writing_an_interpreter_in_rust
[INFO] running `"git" "fetch" "--all"`
[INFO] [stdout] Fetching origin
[INFO] [stderr] From git://github.com/chr4/writing_an_interpreter_in_rust
[INFO] [stderr]  * branch            HEAD       -> FETCH_HEAD
[INFO] running `"git" "clone" "work/cache/sources/gh/chr4/writing_an_interpreter_in_rust" "work/ex/beta-1.37-6/sources/1.36.0/gh/chr4/writing_an_interpreter_in_rust"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.37-6/sources/1.36.0/gh/chr4/writing_an_interpreter_in_rust'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/chr4/writing_an_interpreter_in_rust" "work/ex/beta-1.37-6/sources/beta-2019-07-23/gh/chr4/writing_an_interpreter_in_rust"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.37-6/sources/beta-2019-07-23/gh/chr4/writing_an_interpreter_in_rust'...
[INFO] [stderr] done.
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] b93e351e7ad6b51c78fbb8ce8d2952eb4281810a
[INFO] sha for GitHub repo chr4/writing_an_interpreter_in_rust: b93e351e7ad6b51c78fbb8ce8d2952eb4281810a
[INFO] validating manifest of chr4/writing_an_interpreter_in_rust 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 chr4/writing_an_interpreter_in_rust 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 chr4/writing_an_interpreter_in_rust
[INFO] finished frobbing chr4/writing_an_interpreter_in_rust
[INFO] frobbed toml for chr4/writing_an_interpreter_in_rust written to work/ex/beta-1.37-6/sources/1.36.0/gh/chr4/writing_an_interpreter_in_rust/Cargo.toml
[INFO] started frobbing chr4/writing_an_interpreter_in_rust
[INFO] finished frobbing chr4/writing_an_interpreter_in_rust
[INFO] frobbed toml for chr4/writing_an_interpreter_in_rust written to work/ex/beta-1.37-6/sources/beta-2019-07-23/gh/chr4/writing_an_interpreter_in_rust/Cargo.toml
[INFO] crate chr4/writing_an_interpreter_in_rust already has a lockfile, it will not be regenerated
[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 chr4/writing_an_interpreter_in_rust 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-6/1.36.0:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.37-6/sources/1.36.0/gh/chr4/writing_an_interpreter_in_rust:/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] a1538817cbbd16eade277ca58b0893ea5ba814da96aa86a2c4fd76ba2a410284
[INFO] running `"docker" "start" "-a" "a1538817cbbd16eade277ca58b0893ea5ba814da96aa86a2c4fd76ba2a410284"`
[INFO] [stderr]    Compiling writing_an_interpreter_in_rust v0.1.0 (/opt/crater/workdir)
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 1.59s
[INFO] running `"docker" "inspect" "a1538817cbbd16eade277ca58b0893ea5ba814da96aa86a2c4fd76ba2a410284"`
[INFO] running `"docker" "rm" "-f" "a1538817cbbd16eade277ca58b0893ea5ba814da96aa86a2c4fd76ba2a410284"`
[INFO] [stdout] a1538817cbbd16eade277ca58b0893ea5ba814da96aa86a2c4fd76ba2a410284
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.37-6/worker-6/1.36.0:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.37-6/sources/1.36.0/gh/chr4/writing_an_interpreter_in_rust:/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] 57c9e56b81a20c8c0c5854213f5072fe3e911715797fa4a21ef8da6459baea20
[INFO] running `"docker" "start" "-a" "57c9e56b81a20c8c0c5854213f5072fe3e911715797fa4a21ef8da6459baea20"`
[INFO] [stderr]    Compiling writing_an_interpreter_in_rust v0.1.0 (/opt/crater/workdir)
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 1.76s
[INFO] running `"docker" "inspect" "57c9e56b81a20c8c0c5854213f5072fe3e911715797fa4a21ef8da6459baea20"`
[INFO] running `"docker" "rm" "-f" "57c9e56b81a20c8c0c5854213f5072fe3e911715797fa4a21ef8da6459baea20"`
[INFO] [stdout] 57c9e56b81a20c8c0c5854213f5072fe3e911715797fa4a21ef8da6459baea20
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.37-6/worker-6/1.36.0:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.37-6/sources/1.36.0/gh/chr4/writing_an_interpreter_in_rust:/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] 8ee8d14da8b1bba55bd867799eb0c264ad02539dec78b07b2a657d3c7cd94e45
[INFO] running `"docker" "start" "-a" "8ee8d14da8b1bba55bd867799eb0c264ad02539dec78b07b2a657d3c7cd94e45"`
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.04s
[INFO] [stderr]      Running /opt/crater/target/debug/deps/writing_an_interpreter_in_rust-6c35c72148490dfc
[INFO] [stdout] 
[INFO] [stdout] running 3 tests
[INFO] [stdout] test token::lookup_ident_test ... ok
[INFO] [stdout] test lexer::next_token_test ... ok
[INFO] [stdout] test lexer::is_letter_test ... ok
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 3 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out
[INFO] [stdout] 
[INFO] [stderr]      Running /opt/crater/target/debug/deps/writing_an_interpreter_in_rust-d134fc85a8a3a8a5
[INFO] [stdout] 
[INFO] [stdout] running 3 tests
[INFO] [stdout] test token::lookup_ident_test ... ok
[INFO] [stdout] test lexer::is_letter_test ... ok
[INFO] [stdout] test lexer::next_token_test ... ok
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 3 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out
[INFO] [stdout] 
[INFO] [stderr]    Doc-tests writing_an_interpreter_in_rust
[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" "8ee8d14da8b1bba55bd867799eb0c264ad02539dec78b07b2a657d3c7cd94e45"`
[INFO] running `"docker" "rm" "-f" "8ee8d14da8b1bba55bd867799eb0c264ad02539dec78b07b2a657d3c7cd94e45"`
[INFO] [stdout] 8ee8d14da8b1bba55bd867799eb0c264ad02539dec78b07b2a657d3c7cd94e45