[INFO] crate stacktrace 0.2.1 is already in cache
[INFO] extracting crate stacktrace 0.2.1 into work/ex/beta-1.37-6/sources/1.36.0/reg/stacktrace/0.2.1
[INFO] extracting crate stacktrace 0.2.1 into work/ex/beta-1.37-6/sources/beta-2019-07-23/reg/stacktrace/0.2.1
[INFO] validating manifest of stacktrace-0.2.1 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 stacktrace-0.2.1 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 stacktrace-0.2.1
[INFO] removed 0 missing examples
[INFO] finished frobbing stacktrace-0.2.1
[INFO] frobbed toml for stacktrace-0.2.1 written to work/ex/beta-1.37-6/sources/1.36.0/reg/stacktrace/0.2.1/Cargo.toml
[INFO] started frobbing stacktrace-0.2.1
[INFO] removed 0 missing examples
[INFO] finished frobbing stacktrace-0.2.1
[INFO] frobbed toml for stacktrace-0.2.1 written to work/ex/beta-1.37-6/sources/beta-2019-07-23/reg/stacktrace/0.2.1/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 stacktrace-0.2.1 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-7/1.36.0:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.37-6/sources/1.36.0/reg/stacktrace/0.2.1:/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] 4d84546f5c7420f928c08073cae910f107e1e4c7f4361fd23ac832484c73f996
[INFO] running `"docker" "start" "-a" "4d84546f5c7420f928c08073cae910f107e1e4c7f4361fd23ac832484c73f996"`
[INFO] [stderr]    Compiling backtrace v0.2.3
[INFO] [stderr]    Compiling stacktrace v0.2.1 (/opt/crater/workdir)
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 1.55s
[INFO] running `"docker" "inspect" "4d84546f5c7420f928c08073cae910f107e1e4c7f4361fd23ac832484c73f996"`
[INFO] running `"docker" "rm" "-f" "4d84546f5c7420f928c08073cae910f107e1e4c7f4361fd23ac832484c73f996"`
[INFO] [stdout] 4d84546f5c7420f928c08073cae910f107e1e4c7f4361fd23ac832484c73f996
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.37-6/worker-7/1.36.0:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.37-6/sources/1.36.0/reg/stacktrace/0.2.1:/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] 104dcc0fc7f9c24981659bee29f1a9827d75005da218a681171ee1f00aad4607
[INFO] running `"docker" "start" "-a" "104dcc0fc7f9c24981659bee29f1a9827d75005da218a681171ee1f00aad4607"`
[INFO] [stderr]    Compiling stacktrace v0.2.1 (/opt/crater/workdir)
[INFO] [stderr] warning: unused import: `std::fmt::Debug`
[INFO] [stderr]  --> examples/using_result/main.rs:3:5
[INFO] [stderr]   |
[INFO] [stderr] 3 | use std::fmt::Debug;
[INFO] [stderr]   |     ^^^^^^^^^^^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: #[warn(unused_imports)] on by default
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.97s
[INFO] running `"docker" "inspect" "104dcc0fc7f9c24981659bee29f1a9827d75005da218a681171ee1f00aad4607"`
[INFO] running `"docker" "rm" "-f" "104dcc0fc7f9c24981659bee29f1a9827d75005da218a681171ee1f00aad4607"`
[INFO] [stdout] 104dcc0fc7f9c24981659bee29f1a9827d75005da218a681171ee1f00aad4607
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.37-6/worker-7/1.36.0:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.37-6/sources/1.36.0/reg/stacktrace/0.2.1:/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] fbf664fe54f048789568894259e8828d9850d9963619fe527f7f1c137e5d279b
[INFO] running `"docker" "start" "-a" "fbf664fe54f048789568894259e8828d9850d9963619fe527f7f1c137e5d279b"`
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.02s
[INFO] [stderr]      Running /opt/crater/target/debug/deps/stacktrace-ea75b698f2b1e9ec
[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] [stderr]    Doc-tests stacktrace
[INFO] [stdout] 
[INFO] [stdout] running 4 tests
[INFO] [stdout] test src/lib.rs -  (line 19) ... ok
[INFO] [stdout] test src/lib.rs -  (line 29) ... ok
[INFO] [stdout] test src/lib.rs - trace (line 107) ... ok
[INFO] [stdout] test src/lib.rs - trace (line 137) ... ok
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 4 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out
[INFO] [stdout] 
[INFO] running `"docker" "inspect" "fbf664fe54f048789568894259e8828d9850d9963619fe527f7f1c137e5d279b"`
[INFO] running `"docker" "rm" "-f" "fbf664fe54f048789568894259e8828d9850d9963619fe527f7f1c137e5d279b"`
[INFO] [stdout] fbf664fe54f048789568894259e8828d9850d9963619fe527f7f1c137e5d279b