[INFO] crate b_error 0.1.0 is already in cache
[INFO] testing b_error-0.1.0 against try#41997647ba6a77908f6ef64401414feb00bccf16 for pr-71274
[INFO] extracting crate b_error 0.1.0 into /workspace/builds/worker-12/source
[INFO] validating manifest of crates.io crate b_error 0.1.0 on toolchain 41997647ba6a77908f6ef64401414feb00bccf16
[INFO] running `"/workspace/cargo-home/bin/cargo" "+41997647ba6a77908f6ef64401414feb00bccf16" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started tweaking crates.io crate b_error 0.1.0
[INFO] finished tweaking crates.io crate b_error 0.1.0
[INFO] tweaked toml for crates.io crate b_error 0.1.0 written to /workspace/builds/worker-12/source/Cargo.toml
[INFO] running `"/workspace/cargo-home/bin/cargo" "+41997647ba6a77908f6ef64401414feb00bccf16" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update"`
[INFO] running `"/workspace/cargo-home/bin/cargo" "+41997647ba6a77908f6ef64401414feb00bccf16" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] running `"docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-12/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-12/source:/opt/rustwide/workdir:ro,Z" "-v" "/var/lib/crater-agent-workspace/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/var/lib/crater-agent-workspace/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "MAP_USER_ID=0" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=forbid" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--network" "none" "rustops/crates-build-env" "/opt/rustwide/cargo-home/bin/cargo" "+41997647ba6a77908f6ef64401414feb00bccf16" "build" "--frozen"`
[INFO] [stdout] 72505c10b7f528f9033cf1e88e63619355ab2605c4aaaf5adf9491eac3ae9256
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] running `"docker" "start" "-a" "72505c10b7f528f9033cf1e88e63619355ab2605c4aaaf5adf9491eac3ae9256"`
[INFO] [stderr]    Compiling b_error v0.1.0 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.48s
[INFO] running `"docker" "inspect" "72505c10b7f528f9033cf1e88e63619355ab2605c4aaaf5adf9491eac3ae9256"`
[INFO] running `"docker" "rm" "-f" "72505c10b7f528f9033cf1e88e63619355ab2605c4aaaf5adf9491eac3ae9256"`
[INFO] [stdout] 72505c10b7f528f9033cf1e88e63619355ab2605c4aaaf5adf9491eac3ae9256
[INFO] running `"docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-12/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-12/source:/opt/rustwide/workdir:ro,Z" "-v" "/var/lib/crater-agent-workspace/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/var/lib/crater-agent-workspace/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "MAP_USER_ID=0" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=forbid" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--network" "none" "rustops/crates-build-env" "/opt/rustwide/cargo-home/bin/cargo" "+41997647ba6a77908f6ef64401414feb00bccf16" "test" "--frozen" "--no-run"`
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] [stdout] 6a48d356cb14abb7f16eb7d5e75f96afe72b951ea6d11a4093567f71b91f8276
[INFO] running `"docker" "start" "-a" "6a48d356cb14abb7f16eb7d5e75f96afe72b951ea6d11a4093567f71b91f8276"`
[INFO] [stderr]    Compiling b_error v0.1.0 (/opt/rustwide/workdir)
[INFO] [stderr] error[E0599]: no method named `c` found for enum `std::result::Result<(), test::TestError>` in the current scope
[INFO] [stderr]    --> error.rs:130:19
[INFO] [stderr]     |
[INFO] [stderr] 130 |         ret_s_t().c("test")?;
[INFO] [stderr]     |                   ^ method not found in `std::result::Result<(), test::TestError>`
[INFO] [stderr] 
[INFO] [stderr] error[E0599]: no method named `c` found for enum `std::result::Result<(), BError>` in the current scope
[INFO] [stderr]    --> error.rs:131:19
[INFO] [stderr]     |
[INFO] [stderr] 131 |         ret_s_b().c("test")?;
[INFO] [stderr]     |                   ^ method not found in `std::result::Result<(), BError>`
[INFO] [stderr] 
[INFO] [stderr] error: aborting due to 2 previous errors
[INFO] [stderr] 
[INFO] [stderr] For more information about this error, try `rustc --explain E0599`.
[INFO] [stderr] error: could not compile `b_error`.
[INFO] [stderr] 
[INFO] [stderr] To learn more, run the command again with --verbose.
[INFO] running `"docker" "inspect" "6a48d356cb14abb7f16eb7d5e75f96afe72b951ea6d11a4093567f71b91f8276"`
[INFO] running `"docker" "rm" "-f" "6a48d356cb14abb7f16eb7d5e75f96afe72b951ea6d11a4093567f71b91f8276"`
[INFO] [stdout] 6a48d356cb14abb7f16eb7d5e75f96afe72b951ea6d11a4093567f71b91f8276