[INFO] fetching crate rust-string-random 0.1.0... [INFO] testing rust-string-random-0.1.0 against master#ff2c56344c764af598ad33027e9c7a48881808ef for pr-118825 [INFO] extracting crate rust-string-random 0.1.0 into /workspace/builds/worker-4-tc1/source [INFO] validating manifest of crates.io crate rust-string-random 0.1.0 on toolchain ff2c56344c764af598ad33027e9c7a48881808ef [INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+ff2c56344c764af598ad33027e9c7a48881808ef" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }` [INFO] started tweaking crates.io crate rust-string-random 0.1.0 [INFO] finished tweaking crates.io crate rust-string-random 0.1.0 [INFO] tweaked toml for crates.io crate rust-string-random 0.1.0 written to /workspace/builds/worker-4-tc1/source/Cargo.toml [INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+ff2c56344c764af598ad33027e9c7a48881808ef" "generate-lockfile" "--manifest-path" "Cargo.toml", kill_on_drop: false }` [INFO] [stderr] Updating crates.io index [INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+ff2c56344c764af598ad33027e9c7a48881808ef" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }` [INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-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@sha256:2788e3201cd34a07e3172128adcd8b3090168a8e3bcc40d7c032b9dda1df7d1c" "/opt/rustwide/cargo-home/bin/cargo" "+ff2c56344c764af598ad33027e9c7a48881808ef" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }` [INFO] [stdout] ce0b46ecf9eccb1d1d3ba9398d9825fb75555eb91469e680faef3ef10e0f0d38 [INFO] running `Command { std: "docker" "start" "-a" "ce0b46ecf9eccb1d1d3ba9398d9825fb75555eb91469e680faef3ef10e0f0d38", kill_on_drop: false }` [INFO] running `Command { std: "docker" "inspect" "ce0b46ecf9eccb1d1d3ba9398d9825fb75555eb91469e680faef3ef10e0f0d38", kill_on_drop: false }` [INFO] running `Command { std: "docker" "rm" "-f" "ce0b46ecf9eccb1d1d3ba9398d9825fb75555eb91469e680faef3ef10e0f0d38", kill_on_drop: false }` [INFO] [stdout] ce0b46ecf9eccb1d1d3ba9398d9825fb75555eb91469e680faef3ef10e0f0d38 [INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-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@sha256:2788e3201cd34a07e3172128adcd8b3090168a8e3bcc40d7c032b9dda1df7d1c" "/opt/rustwide/cargo-home/bin/cargo" "+ff2c56344c764af598ad33027e9c7a48881808ef" "build" "--frozen" "--message-format=json", kill_on_drop: false }` [INFO] [stdout] e3345086565428edf482432ee0822c56e41cffaa23084d685c3de5cf6b56da52 [INFO] running `Command { std: "docker" "start" "-a" "e3345086565428edf482432ee0822c56e41cffaa23084d685c3de5cf6b56da52", kill_on_drop: false }` [INFO] [stderr] Compiling libc v0.2.151 [INFO] [stderr] Compiling getrandom v0.1.16 [INFO] [stderr] Compiling rand_core v0.5.1 [INFO] [stderr] Compiling rand_chacha v0.2.2 [INFO] [stderr] Compiling rand v0.7.3 [INFO] [stderr] Compiling rust-string-random v0.1.0 (/opt/rustwide/workdir) [INFO] [stderr] Finished dev [unoptimized + debuginfo] target(s) in 1.47s [INFO] running `Command { std: "docker" "inspect" "e3345086565428edf482432ee0822c56e41cffaa23084d685c3de5cf6b56da52", kill_on_drop: false }` [INFO] running `Command { std: "docker" "rm" "-f" "e3345086565428edf482432ee0822c56e41cffaa23084d685c3de5cf6b56da52", kill_on_drop: false }` [INFO] [stdout] e3345086565428edf482432ee0822c56e41cffaa23084d685c3de5cf6b56da52 [INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-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@sha256:2788e3201cd34a07e3172128adcd8b3090168a8e3bcc40d7c032b9dda1df7d1c" "/opt/rustwide/cargo-home/bin/cargo" "+ff2c56344c764af598ad33027e9c7a48881808ef" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }` [INFO] [stdout] 7613cd7e6416677c39ec0a3384260111f9940c296a394963d86ac94969141d69 [INFO] running `Command { std: "docker" "start" "-a" "7613cd7e6416677c39ec0a3384260111f9940c296a394963d86ac94969141d69", kill_on_drop: false }` [INFO] [stderr] Compiling rust-string-random v0.1.0 (/opt/rustwide/workdir) [INFO] [stderr] Finished test [unoptimized + debuginfo] target(s) in 0.29s [INFO] running `Command { std: "docker" "inspect" "7613cd7e6416677c39ec0a3384260111f9940c296a394963d86ac94969141d69", kill_on_drop: false }` [INFO] running `Command { std: "docker" "rm" "-f" "7613cd7e6416677c39ec0a3384260111f9940c296a394963d86ac94969141d69", kill_on_drop: false }` [INFO] [stdout] 7613cd7e6416677c39ec0a3384260111f9940c296a394963d86ac94969141d69 [INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-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@sha256:2788e3201cd34a07e3172128adcd8b3090168a8e3bcc40d7c032b9dda1df7d1c" "/opt/rustwide/cargo-home/bin/cargo" "+ff2c56344c764af598ad33027e9c7a48881808ef" "test" "--frozen", kill_on_drop: false }` [INFO] [stdout] 5b7da149842d54e5cbdb198678de137d97ffeda2dfda8b879b96052aec4ba013 [INFO] running `Command { std: "docker" "start" "-a" "5b7da149842d54e5cbdb198678de137d97ffeda2dfda8b879b96052aec4ba013", kill_on_drop: false }` [INFO] [stderr] Finished test [unoptimized + debuginfo] target(s) in 0.01s [INFO] [stderr] Running unittests src/lib.rs (/opt/rustwide/target/debug/deps/rust_string_random-b5c74dd173819659) [INFO] [stdout] [INFO] [stdout] running 1 test [INFO] [stdout] test tests::string_random ... ok [INFO] [stdout] [INFO] [stdout] test result: ok. 1 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.00s [INFO] [stdout] [INFO] [stderr] Doc-tests rust-string-random [INFO] [stdout] [INFO] [stdout] running 1 test [INFO] [stdout] test src/lib.rs - random (line 14) ... FAILED [INFO] [stdout] [INFO] [stdout] failures: [INFO] [stdout] [INFO] [stdout] ---- src/lib.rs - random (line 14) stdout ---- [INFO] [stdout] Test executable failed (exit status: 101). [INFO] [stdout] [INFO] [stdout] stderr: [INFO] [stdout] thread 'main' panicked at src/lib.rs:52:27: [INFO] [stdout] attempt to subtract with overflow [INFO] [stdout] stack backtrace: [INFO] [stdout] 0: 0x5626866b415c - std::backtrace_rs::backtrace::libunwind::trace::h03859d238dbdd93c [INFO] [stdout] at /rustc/ff2c56344c764af598ad33027e9c7a48881808ef/library/std/src/../../backtrace/src/backtrace/libunwind.rs:104:5 [INFO] [stdout] 1: 0x5626866b415c - std::backtrace_rs::backtrace::trace_unsynchronized::h2e251246e2581a42 [INFO] [stdout] at /rustc/ff2c56344c764af598ad33027e9c7a48881808ef/library/std/src/../../backtrace/src/backtrace/mod.rs:66:5 [INFO] [stdout] 2: 0x5626866b415c - std::sys_common::backtrace::_print_fmt::h5baa2f175792666a [INFO] [stdout] at /rustc/ff2c56344c764af598ad33027e9c7a48881808ef/library/std/src/sys_common/backtrace.rs:68:5 [INFO] [stdout] 3: 0x5626866b415c - ::fmt::h00d759009813d8ca [INFO] [stdout] at /rustc/ff2c56344c764af598ad33027e9c7a48881808ef/library/std/src/sys_common/backtrace.rs:44:22 [INFO] [stdout] 4: 0x5626866d3be0 - core::fmt::rt::Argument::fmt::hcd158635f297e549 [INFO] [stdout] at /rustc/ff2c56344c764af598ad33027e9c7a48881808ef/library/core/src/fmt/rt.rs:142:9 [INFO] [stdout] 5: 0x5626866d3be0 - core::fmt::write::h9c5087e04fe38018 [INFO] [stdout] at /rustc/ff2c56344c764af598ad33027e9c7a48881808ef/library/core/src/fmt/mod.rs:1120:17 [INFO] [stdout] 6: 0x5626866b260f - std::io::Write::write_fmt::h587b8e5eb2f9d067 [INFO] [stdout] at /rustc/ff2c56344c764af598ad33027e9c7a48881808ef/library/std/src/io/mod.rs:1810:15 [INFO] [stdout] 7: 0x5626866b3f44 - std::sys_common::backtrace::_print::h25969b404f42f4bb [INFO] [stdout] at /rustc/ff2c56344c764af598ad33027e9c7a48881808ef/library/std/src/sys_common/backtrace.rs:47:5 [INFO] [stdout] 8: 0x5626866b3f44 - std::sys_common::backtrace::print::h68d3414e8c63fb83 [INFO] [stdout] at /rustc/ff2c56344c764af598ad33027e9c7a48881808ef/library/std/src/sys_common/backtrace.rs:34:9 [INFO] [stdout] 9: 0x5626866b5457 - std::panicking::default_hook::{{closure}}::hccfef51edabebb9a [INFO] [stdout] 10: 0x5626866b51bf - std::panicking::default_hook::hdec7a4759fa427e8 [INFO] [stdout] at /rustc/ff2c56344c764af598ad33027e9c7a48881808ef/library/std/src/panicking.rs:292:9 [INFO] [stdout] 11: 0x5626866b58d8 - std::panicking::rust_panic_with_hook::h9d502a4da1912fba [INFO] [stdout] at /rustc/ff2c56344c764af598ad33027e9c7a48881808ef/library/std/src/panicking.rs:779:13 [INFO] [stdout] 12: 0x5626866b5789 - std::panicking::begin_panic_handler::{{closure}}::h3a68181f2e6a785b [INFO] [stdout] at /rustc/ff2c56344c764af598ad33027e9c7a48881808ef/library/std/src/panicking.rs:649:13 [INFO] [stdout] 13: 0x5626866b4626 - std::sys_common::backtrace::__rust_end_short_backtrace::hc1d088e8c1328911 [INFO] [stdout] at /rustc/ff2c56344c764af598ad33027e9c7a48881808ef/library/std/src/sys_common/backtrace.rs:171:18 [INFO] [stdout] 14: 0x5626866b5522 - rust_begin_unwind [INFO] [stdout] at /rustc/ff2c56344c764af598ad33027e9c7a48881808ef/library/std/src/panicking.rs:645:5 [INFO] [stdout] 15: 0x56268665a2b5 - core::panicking::panic_fmt::h15511a438b78bb2f [INFO] [stdout] at /rustc/ff2c56344c764af598ad33027e9c7a48881808ef/library/core/src/panicking.rs:72:14 [INFO] [stdout] 16: 0x56268665a373 - core::panicking::panic::h15952cc6290ce273 [INFO] [stdout] at /rustc/ff2c56344c764af598ad33027e9c7a48881808ef/library/core/src/panicking.rs:144:5 [INFO] [stdout] 17: 0x56268665e136 - rust_string_random::random::h844b7ed78879c904 [INFO] [stdout] at /opt/rustwide/workdir/src/lib.rs:52:27 [INFO] [stdout] 18: 0x56268665afa3 - rust_out::main::_doctest_main_src_lib_rs_14_0::h1701e9aca2d28e42 [INFO] [stdout] 19: 0x56268665aee6 - rust_out::main::h472cac1c7326a89d [INFO] [stdout] 20: 0x56268665ac33 - core::ops::function::FnOnce::call_once::h6359513b3c61de38 [INFO] [stdout] 21: 0x56268665abb6 - std::sys_common::backtrace::__rust_begin_short_backtrace::h5da41536245dd954 [INFO] [stdout] 22: 0x56268665ac09 - std::rt::lang_start::{{closure}}::hca7f49109d28c81f [INFO] [stdout] 23: 0x5626866b0157 - core::ops::function::impls:: for &F>::call_once::haf9fb8bf7327c1ff [INFO] [stdout] at /rustc/ff2c56344c764af598ad33027e9c7a48881808ef/library/core/src/ops/function.rs:284:13 [INFO] [stdout] 24: 0x5626866b0157 - std::panicking::try::do_call::h67507db509654d44 [INFO] [stdout] at /rustc/ff2c56344c764af598ad33027e9c7a48881808ef/library/std/src/panicking.rs:552:40 [INFO] [stdout] 25: 0x5626866b0157 - std::panicking::try::h9fb9a4343adc941d [INFO] [stdout] at /rustc/ff2c56344c764af598ad33027e9c7a48881808ef/library/std/src/panicking.rs:516:19 [INFO] [stdout] 26: 0x5626866b0157 - std::panic::catch_unwind::hf0df8339dcf82c92 [INFO] [stdout] at /rustc/ff2c56344c764af598ad33027e9c7a48881808ef/library/std/src/panic.rs:142:14 [INFO] [stdout] 27: 0x5626866b0157 - std::rt::lang_start_internal::{{closure}}::hca80cdac4aa434b3 [INFO] [stdout] at /rustc/ff2c56344c764af598ad33027e9c7a48881808ef/library/std/src/rt.rs:148:48 [INFO] [stdout] 28: 0x5626866b0157 - std::panicking::try::do_call::h30d3b7b6fd41cae7 [INFO] [stdout] at /rustc/ff2c56344c764af598ad33027e9c7a48881808ef/library/std/src/panicking.rs:552:40 [INFO] [stdout] 29: 0x5626866b0157 - std::panicking::try::h38f26474b74a3465 [INFO] [stdout] at /rustc/ff2c56344c764af598ad33027e9c7a48881808ef/library/std/src/panicking.rs:516:19 [INFO] [stdout] 30: 0x5626866b0157 - std::panic::catch_unwind::h453b3258a72394e6 [INFO] [stdout] at /rustc/ff2c56344c764af598ad33027e9c7a48881808ef/library/std/src/panic.rs:142:14 [INFO] [stdout] 31: 0x5626866b0157 - std::rt::lang_start_internal::hcbba8636b1c9aa3e [INFO] [stdout] at /rustc/ff2c56344c764af598ad33027e9c7a48881808ef/library/std/src/rt.rs:148:20 [INFO] [stdout] 32: 0x56268665abe7 - std::rt::lang_start::h7de340ff555ceb78 [INFO] [stdout] 33: 0x56268665aff5 - main [INFO] [stdout] 34: 0x7ff4117d9d90 - [INFO] [stdout] 35: 0x7ff4117d9e40 - __libc_start_main [INFO] [stdout] 36: 0x56268665aae5 - _start [INFO] [stdout] 37: 0x0 - [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] failures: [INFO] [stdout] src/lib.rs - random (line 14) [INFO] [stdout] [INFO] [stdout] test result: FAILED. 0 passed; 1 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.19s [INFO] [stdout] [INFO] [stderr] error: doctest failed, to rerun pass `--doc` [INFO] running `Command { std: "docker" "inspect" "5b7da149842d54e5cbdb198678de137d97ffeda2dfda8b879b96052aec4ba013", kill_on_drop: false }` [INFO] running `Command { std: "docker" "rm" "-f" "5b7da149842d54e5cbdb198678de137d97ffeda2dfda8b879b96052aec4ba013", kill_on_drop: false }` [INFO] [stdout] 5b7da149842d54e5cbdb198678de137d97ffeda2dfda8b879b96052aec4ba013