[INFO] fetching crate ark-std 0.5.0...
[INFO] testing ark-std-0.5.0 against try#c2e32f1c9652b13ed99608599c1e855462f421f3 for pr-146098-7
[INFO] extracting crate ark-std 0.5.0 into /workspace/builds/worker-7-tc2/source
[INFO] started tweaking crates.io crate ark-std 0.5.0
[INFO] finished tweaking crates.io crate ark-std 0.5.0
[INFO] tweaked toml for crates.io crate ark-std 0.5.0 written to /workspace/builds/worker-7-tc2/source/Cargo.toml
[INFO] validating manifest of crates.io crate ark-std 0.5.0 on toolchain c2e32f1c9652b13ed99608599c1e855462f421f3
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+c2e32f1c9652b13ed99608599c1e855462f421f3" "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" "+c2e32f1c9652b13ed99608599c1e855462f421f3" "generate-lockfile" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Updating crates.io index
[INFO] [stderr]      Locking 34 packages to latest compatible versions
[INFO] [stderr]       Adding colored v2.2.0 (available: v3.0.0)
[INFO] [stderr]       Adding rand v0.8.5 (available: v0.9.2)
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+c2e32f1c9652b13ed99608599c1e855462f421f3" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-tc2/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" "+c2e32f1c9652b13ed99608599c1e855462f421f3" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 42d03a9bf98df836fe371b827e2784b014af348f70ca657e49ab5332e1218842
[INFO] running `Command { std: "docker" "start" "-a" "42d03a9bf98df836fe371b827e2784b014af348f70ca657e49ab5332e1218842", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "42d03a9bf98df836fe371b827e2784b014af348f70ca657e49ab5332e1218842", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "42d03a9bf98df836fe371b827e2784b014af348f70ca657e49ab5332e1218842", kill_on_drop: false }`
[INFO] [stdout] 42d03a9bf98df836fe371b827e2784b014af348f70ca657e49ab5332e1218842
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-tc2/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" "+c2e32f1c9652b13ed99608599c1e855462f421f3" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 9a4da22b1e064982510137c0b97c91c1b282d8172c449e96da1fba6dbf201954
[INFO] running `Command { std: "docker" "start" "-a" "9a4da22b1e064982510137c0b97c91c1b282d8172c449e96da1fba6dbf201954", kill_on_drop: false }`
[INFO] [stderr]    Compiling rand_core v0.6.4
[INFO] [stderr]    Compiling num-traits v0.2.19
[INFO] [stderr]    Compiling rand_chacha v0.3.1
[INFO] [stderr]    Compiling rand v0.8.5
[INFO] [stderr]    Compiling ark-std v0.5.0 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 0.96s
[INFO] running `Command { std: "docker" "inspect" "9a4da22b1e064982510137c0b97c91c1b282d8172c449e96da1fba6dbf201954", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "9a4da22b1e064982510137c0b97c91c1b282d8172c449e96da1fba6dbf201954", kill_on_drop: false }`
[INFO] [stdout] 9a4da22b1e064982510137c0b97c91c1b282d8172c449e96da1fba6dbf201954
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-tc2/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" "+c2e32f1c9652b13ed99608599c1e855462f421f3" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 21df12b79c3f776d4a52786c9202bdfbbabba2ddcc3b5aaa3af3d93bdf2845e2
[INFO] running `Command { std: "docker" "start" "-a" "21df12b79c3f776d4a52786c9202bdfbbabba2ddcc3b5aaa3af3d93bdf2845e2", kill_on_drop: false }`
[INFO] [stderr]    Compiling libc v0.2.177
[INFO] [stderr]    Compiling zerocopy v0.8.27
[INFO] [stderr]    Compiling cfg-if v1.0.4
[INFO] [stderr]    Compiling autocfg v1.5.0
[INFO] [stderr]    Compiling num-traits v0.2.19
[INFO] [stderr]    Compiling getrandom v0.2.16
[INFO] [stderr]    Compiling rand_core v0.6.4
[INFO] [stderr]    Compiling ppv-lite86 v0.2.21
[INFO] [stderr]    Compiling rand_chacha v0.3.1
[INFO] [stderr]    Compiling rand v0.8.5
[INFO] [stderr]    Compiling ark-std v0.5.0 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished `test` profile [optimized + debuginfo] target(s) in 12.06s
[INFO] running `Command { std: "docker" "inspect" "21df12b79c3f776d4a52786c9202bdfbbabba2ddcc3b5aaa3af3d93bdf2845e2", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "21df12b79c3f776d4a52786c9202bdfbbabba2ddcc3b5aaa3af3d93bdf2845e2", kill_on_drop: false }`
[INFO] [stdout] 21df12b79c3f776d4a52786c9202bdfbbabba2ddcc3b5aaa3af3d93bdf2845e2
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-tc2/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" "+c2e32f1c9652b13ed99608599c1e855462f421f3" "test" "--frozen", kill_on_drop: false }`
[INFO] [stdout] df3824f66c1db975006319412eae463b5e768d3e2cba8d2282f089293d33dd71
[INFO] running `Command { std: "docker" "start" "-a" "df3824f66c1db975006319412eae463b5e768d3e2cba8d2282f089293d33dd71", kill_on_drop: false }`
[INFO] [stderr]     Finished `test` profile [optimized + debuginfo] target(s) in 0.04s
[INFO] [stderr]      Running unittests src/lib.rs (/opt/rustwide/target/debug/deps/ark_std-ce2176cde546fd1b)
[INFO] [stdout] 
[INFO] [stdout] running 4 tests
[INFO] [stdout] test perf_trace::tests::print_add ... ok
[INFO] [stdout] test test::test_cfg_macros ... ok
[INFO] [stdout] test perf_trace::tests::print_start_end ... ok
[INFO] [stdout] test rand_helper::test::test_deterministic_rng ... ok
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 4 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.00s
[INFO] [stdout] 
[INFO] [stderr]    Doc-tests ark_std
[INFO] [stdout] 
[INFO] [stdout] running 6 tests
[INFO] [stdout] test src/iterable/rev.rs - iterable::rev::Reverse (line 11) ... ok
[INFO] [stdout] test src/perf_trace.rs - perf_trace (line 18) ... ok
[INFO] [stdout] test src/iterable/mod.rs - iterable::Iterable (line 19) ... ok
[INFO] [stdout] test src/lib.rs - log2 (line 67) ... ok
[INFO] [stdout] test src/iterable/mod.rs - iterable::Iterable::iter (line 75) ... ok
[INFO] [stdout] test src/perf_trace.rs - perf_trace (line 4) ... ok
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 6 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 3.66s
[INFO] [stdout] 
[INFO] running `Command { std: "docker" "inspect" "df3824f66c1db975006319412eae463b5e768d3e2cba8d2282f089293d33dd71", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "df3824f66c1db975006319412eae463b5e768d3e2cba8d2282f089293d33dd71", kill_on_drop: false }`
[INFO] [stdout] df3824f66c1db975006319412eae463b5e768d3e2cba8d2282f089293d33dd71