[INFO] fetching crate json-writer 0.4.0...
[INFO] testing json-writer-0.4.0 against master#c90bcb9571b7aab0d8beaa2ce8a998ffaf079d38 for pr-146098-7
[INFO] extracting crate json-writer 0.4.0 into /workspace/builds/worker-0-tc1/source
[INFO] started tweaking crates.io crate json-writer 0.4.0
[INFO] finished tweaking crates.io crate json-writer 0.4.0
[INFO] tweaked toml for crates.io crate json-writer 0.4.0 written to /workspace/builds/worker-0-tc1/source/Cargo.toml
[INFO] validating manifest of crates.io crate json-writer 0.4.0 on toolchain c90bcb9571b7aab0d8beaa2ce8a998ffaf079d38
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+c90bcb9571b7aab0d8beaa2ce8a998ffaf079d38" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+c90bcb9571b7aab0d8beaa2ce8a998ffaf079d38" "generate-lockfile" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Updating crates.io index
[INFO] [stderr]      Locking 2 packages to latest compatible versions
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+c90bcb9571b7aab0d8beaa2ce8a998ffaf079d38" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc1/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" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--user" "0:0" "--network" "none" "ghcr.io/rust-lang/crates-build-env/linux@sha256:4848fb76d95f26979359cc7e45710b1dbc8f3acb7aeedee7c460d7702230f228" "/opt/rustwide/cargo-home/bin/cargo" "+c90bcb9571b7aab0d8beaa2ce8a998ffaf079d38" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 57970337d53292e857281eb7359165fda55ba00916f3be16c352b11bf05a6807
[INFO] running `Command { std: "docker" "start" "-a" "57970337d53292e857281eb7359165fda55ba00916f3be16c352b11bf05a6807", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "57970337d53292e857281eb7359165fda55ba00916f3be16c352b11bf05a6807", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "57970337d53292e857281eb7359165fda55ba00916f3be16c352b11bf05a6807", kill_on_drop: false }`
[INFO] [stdout] 57970337d53292e857281eb7359165fda55ba00916f3be16c352b11bf05a6807
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc1/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" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=forbid" "-e" "RUSTDOCFLAGS=--cap-lints=forbid" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--user" "0:0" "--network" "none" "ghcr.io/rust-lang/crates-build-env/linux@sha256:4848fb76d95f26979359cc7e45710b1dbc8f3acb7aeedee7c460d7702230f228" "/opt/rustwide/cargo-home/bin/cargo" "+c90bcb9571b7aab0d8beaa2ce8a998ffaf079d38" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] fc6dedd7dee9bf77b0b7cd2878d56bd42f1a95ffefada9be40c923d37c93f0cb
[INFO] running `Command { std: "docker" "start" "-a" "fc6dedd7dee9bf77b0b7cd2878d56bd42f1a95ffefada9be40c923d37c93f0cb", kill_on_drop: false }`
[INFO] [stderr]    Compiling json-writer v0.4.0 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 0.18s
[INFO] running `Command { std: "docker" "inspect" "fc6dedd7dee9bf77b0b7cd2878d56bd42f1a95ffefada9be40c923d37c93f0cb", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "fc6dedd7dee9bf77b0b7cd2878d56bd42f1a95ffefada9be40c923d37c93f0cb", kill_on_drop: false }`
[INFO] [stdout] fc6dedd7dee9bf77b0b7cd2878d56bd42f1a95ffefada9be40c923d37c93f0cb
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc1/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" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=forbid" "-e" "RUSTDOCFLAGS=--cap-lints=forbid" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--user" "0:0" "--network" "none" "ghcr.io/rust-lang/crates-build-env/linux@sha256:4848fb76d95f26979359cc7e45710b1dbc8f3acb7aeedee7c460d7702230f228" "/opt/rustwide/cargo-home/bin/cargo" "+c90bcb9571b7aab0d8beaa2ce8a998ffaf079d38" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 6a6ad2465030a7509b34c37cc9d53be647ea9406f6b0ecf09d7562e97cdea970
[INFO] running `Command { std: "docker" "start" "-a" "6a6ad2465030a7509b34c37cc9d53be647ea9406f6b0ecf09d7562e97cdea970", kill_on_drop: false }`
[INFO] [stderr]    Compiling json-writer v0.4.0 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished `test` profile [unoptimized + debuginfo] target(s) in 0.50s
[INFO] running `Command { std: "docker" "inspect" "6a6ad2465030a7509b34c37cc9d53be647ea9406f6b0ecf09d7562e97cdea970", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "6a6ad2465030a7509b34c37cc9d53be647ea9406f6b0ecf09d7562e97cdea970", kill_on_drop: false }`
[INFO] [stdout] 6a6ad2465030a7509b34c37cc9d53be647ea9406f6b0ecf09d7562e97cdea970
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc1/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" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=forbid" "-e" "RUSTDOCFLAGS=--cap-lints=forbid" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--user" "0:0" "--network" "none" "ghcr.io/rust-lang/crates-build-env/linux@sha256:4848fb76d95f26979359cc7e45710b1dbc8f3acb7aeedee7c460d7702230f228" "/opt/rustwide/cargo-home/bin/cargo" "+c90bcb9571b7aab0d8beaa2ce8a998ffaf079d38" "test" "--frozen", kill_on_drop: false }`
[INFO] [stdout] 5d997e43d1a241f354ce5ae25d7b30e92f70ba02d9a1c4aa631ff43dd0e707fd
[INFO] running `Command { std: "docker" "start" "-a" "5d997e43d1a241f354ce5ae25d7b30e92f70ba02d9a1c4aa631ff43dd0e707fd", kill_on_drop: false }`
[INFO] [stderr]     Finished `test` profile [unoptimized + debuginfo] target(s) in 0.02s
[INFO] [stderr]      Running unittests src/lib.rs (/opt/rustwide/target/debug/deps/json_writer-1b12b4883feb7b26)
[INFO] [stdout] 
[INFO] [stdout] running 13 tests
[INFO] [stdout] test tests::test_array ... ok
[INFO] [stdout] test tests::test_duplicate_keys ... ok
[INFO] [stdout] test tests::test_dtoa ... ok
[INFO] [stdout] test tests::test_basic_example ... ok
[INFO] [stdout] test tests::test_encoding ... ok
[INFO] [stdout] test tests::test_misc_examples ... ok
[INFO] [stdout] test tests::test_numbers ... ok
[INFO] [stdout] test tests::test_object ... ok
[INFO] [stdout] test tests::test_string_writer ... ok
[INFO] [stdout] test tests::test_strings ... ok
[INFO] [stdout] test tests::test_pretty ... ok
[INFO] [stdout] test tests::test_array_range ... ok
[INFO] [stdout] test tests::test_flush ... ok
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 13 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.20s
[INFO] [stdout] 
[INFO] [stderr]    Doc-tests json_writer
[INFO] [stdout] 
[INFO] [stdout] running 5 tests
[INFO] [stdout] test src/lib.rs - (line 103) - compile fail ... ok
[INFO] [stdout] test src/lib.rs - (line 118) ... ok
[INFO] [stdout] test src/lib.rs - (line 80) ... ok
[INFO] [stdout] test src/lib.rs - (line 26) ... ok
[INFO] [stdout] test src/lib.rs - (line 13) ... ok
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 5 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.59s
[INFO] [stdout] 
[INFO] running `Command { std: "docker" "inspect" "5d997e43d1a241f354ce5ae25d7b30e92f70ba02d9a1c4aa631ff43dd0e707fd", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "5d997e43d1a241f354ce5ae25d7b30e92f70ba02d9a1c4aa631ff43dd0e707fd", kill_on_drop: false }`
[INFO] [stdout] 5d997e43d1a241f354ce5ae25d7b30e92f70ba02d9a1c4aa631ff43dd0e707fd