[INFO] fetching crate rust-string-random 0.1.0... [INFO] testing rust-string-random-0.1.0 against master#6c20ab744b0f82646d90ce9d25894823abc9c669 for pr-99093 [INFO] extracting crate rust-string-random 0.1.0 into /workspace/builds/worker-10/source [INFO] validating manifest of crates.io crate rust-string-random 0.1.0 on toolchain 6c20ab744b0f82646d90ce9d25894823abc9c669 [INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+6c20ab744b0f82646d90ce9d25894823abc9c669" "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-10/source/Cargo.toml [INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+6c20ab744b0f82646d90ce9d25894823abc9c669" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update", kill_on_drop: false }` [INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+6c20ab744b0f82646d90ce9d25894823abc9c669" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }` [INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-10/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-10/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@sha256:5873ed620acfc3295992aedd9294443d62a478a48ba243bc5e6c4f5abaffa05f" "/opt/rustwide/cargo-home/bin/cargo" "+6c20ab744b0f82646d90ce9d25894823abc9c669" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }` [INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap. [INFO] [stdout] bb222b3855d0664057af820806a5d10b210371177479c74ed553ea074bad505a [INFO] running `Command { std: "docker" "start" "-a" "bb222b3855d0664057af820806a5d10b210371177479c74ed553ea074bad505a", kill_on_drop: false }` [INFO] running `Command { std: "docker" "inspect" "bb222b3855d0664057af820806a5d10b210371177479c74ed553ea074bad505a", kill_on_drop: false }` [INFO] running `Command { std: "docker" "rm" "-f" "bb222b3855d0664057af820806a5d10b210371177479c74ed553ea074bad505a", kill_on_drop: false }` [INFO] [stdout] bb222b3855d0664057af820806a5d10b210371177479c74ed553ea074bad505a [INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-10/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-10/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" "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@sha256:5873ed620acfc3295992aedd9294443d62a478a48ba243bc5e6c4f5abaffa05f" "/opt/rustwide/cargo-home/bin/cargo" "+6c20ab744b0f82646d90ce9d25894823abc9c669" "build" "--frozen" "--message-format=json", kill_on_drop: false }` [INFO] [stdout] 90c746a8f17760b1cdaf47040eadb2812bc1b45037281da29aabb96093111ebc [INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap. [INFO] running `Command { std: "docker" "start" "-a" "90c746a8f17760b1cdaf47040eadb2812bc1b45037281da29aabb96093111ebc", kill_on_drop: false }` [INFO] [stderr] Compiling libc v0.2.126 [INFO] [stderr] Compiling getrandom v0.1.16 [INFO] [stderr] Compiling cfg-if v1.0.0 [INFO] [stderr] Compiling ppv-lite86 v0.2.16 [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 6.79s [INFO] running `Command { std: "docker" "inspect" "90c746a8f17760b1cdaf47040eadb2812bc1b45037281da29aabb96093111ebc", kill_on_drop: false }` [INFO] running `Command { std: "docker" "rm" "-f" "90c746a8f17760b1cdaf47040eadb2812bc1b45037281da29aabb96093111ebc", kill_on_drop: false }` [INFO] [stdout] 90c746a8f17760b1cdaf47040eadb2812bc1b45037281da29aabb96093111ebc [INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-10/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-10/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" "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@sha256:5873ed620acfc3295992aedd9294443d62a478a48ba243bc5e6c4f5abaffa05f" "/opt/rustwide/cargo-home/bin/cargo" "+6c20ab744b0f82646d90ce9d25894823abc9c669" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }` [INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap. [INFO] [stdout] d7375b4a59c4421961928e70be4271342c1c4a0a4fa0769e426172e2e21db329 [INFO] running `Command { std: "docker" "start" "-a" "d7375b4a59c4421961928e70be4271342c1c4a0a4fa0769e426172e2e21db329", 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 1.08s [INFO] running `Command { std: "docker" "inspect" "d7375b4a59c4421961928e70be4271342c1c4a0a4fa0769e426172e2e21db329", kill_on_drop: false }` [INFO] running `Command { std: "docker" "rm" "-f" "d7375b4a59c4421961928e70be4271342c1c4a0a4fa0769e426172e2e21db329", kill_on_drop: false }` [INFO] [stdout] d7375b4a59c4421961928e70be4271342c1c4a0a4fa0769e426172e2e21db329 [INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-10/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-10/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" "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@sha256:5873ed620acfc3295992aedd9294443d62a478a48ba243bc5e6c4f5abaffa05f" "/opt/rustwide/cargo-home/bin/cargo" "+6c20ab744b0f82646d90ce9d25894823abc9c669" "test" "--frozen", kill_on_drop: false }` [INFO] [stdout] d5c8ebd6172d510d39feff2c21b95f7ea8f3facb52e165e4a3b589a16b541547 [INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap. [INFO] running `Command { std: "docker" "start" "-a" "d5c8ebd6172d510d39feff2c21b95f7ea8f3facb52e165e4a3b589a16b541547", kill_on_drop: false }` [INFO] [stderr] Finished test [unoptimized + debuginfo] target(s) in 0.02s [INFO] [stderr] Running unittests src/lib.rs (/opt/rustwide/target/debug/deps/rust_string_random-dcf58e9ad2491ec4) [INFO] [stdout] [INFO] [stdout] running 1 test [INFO] [stderr] Doc-tests rust-string-random [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] [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 'attempt to subtract with overflow', src/lib.rs:52:27 [INFO] [stdout] stack backtrace: [INFO] [stdout] 0: 0x55705b400660 - std::backtrace_rs::backtrace::libunwind::trace::h5cec5ee957007983 [INFO] [stdout] at /rustc/6c20ab744b0f82646d90ce9d25894823abc9c669/library/std/src/../../backtrace/src/backtrace/mod.rs:66:5 [INFO] [stdout] 1: 0x55705b400660 - std::backtrace_rs::backtrace::trace_unsynchronized::h3912ce6f9cd18e05 [INFO] [stdout] at /rustc/6c20ab744b0f82646d90ce9d25894823abc9c669/library/std/src/../../backtrace/src/backtrace/mod.rs:66:5 [INFO] [stdout] 2: 0x55705b400660 - std::sys_common::backtrace::_print_fmt::h0b3fbca24cbc1b41 [INFO] [stdout] at /rustc/6c20ab744b0f82646d90ce9d25894823abc9c669/library/std/src/sys_common/backtrace.rs:66:5 [INFO] [stdout] 3: 0x55705b400660 - ::fmt::hc7b35b5b2e247560 [INFO] [stdout] at /rustc/6c20ab744b0f82646d90ce9d25894823abc9c669/library/std/src/sys_common/backtrace.rs:45:22 [INFO] [stdout] 4: 0x55705b41af1c - core::fmt::write::h2d806358caa3f689 [INFO] [stdout] at /rustc/6c20ab744b0f82646d90ce9d25894823abc9c669/library/core/src/fmt/mod.rs:1198:17 [INFO] [stdout] 5: 0x55705b3fe585 - std::io::Write::write_fmt::hdb0339c89484490f [INFO] [stdout] at /rustc/6c20ab744b0f82646d90ce9d25894823abc9c669/library/std/src/io/mod.rs:1672:15 [INFO] [stdout] 6: 0x55705b401d31 - std::sys_common::backtrace::_print::h51a933838ceebaa0 [INFO] [stdout] at /rustc/6c20ab744b0f82646d90ce9d25894823abc9c669/library/std/src/sys_common/backtrace.rs:48:5 [INFO] [stdout] 7: 0x55705b401d31 - std::sys_common::backtrace::print::hc53e3ead445b016c [INFO] [stdout] at /rustc/6c20ab744b0f82646d90ce9d25894823abc9c669/library/std/src/sys_common/backtrace.rs:35:9 [INFO] [stdout] 8: 0x55705b401d31 - std::panicking::default_hook::{{closure}}::hbc895cb9b7ebea62 [INFO] [stdout] at /rustc/6c20ab744b0f82646d90ce9d25894823abc9c669/library/std/src/panicking.rs:295:22 [INFO] [stdout] 9: 0x55705b401a03 - std::panicking::default_hook::h664409a8548f2cc0 [INFO] [stdout] at /rustc/6c20ab744b0f82646d90ce9d25894823abc9c669/library/std/src/panicking.rs:314:9 [INFO] [stdout] 10: 0x55705b4023d3 - std::panicking::rust_panic_with_hook::h947033eb042c9758 [INFO] [stdout] at /rustc/6c20ab744b0f82646d90ce9d25894823abc9c669/library/std/src/panicking.rs:698:17 [INFO] [stdout] 11: 0x55705b402289 - std::panicking::begin_panic_handler::{{closure}}::haef8fa2237a58bae [INFO] [stdout] at /rustc/6c20ab744b0f82646d90ce9d25894823abc9c669/library/std/src/panicking.rs:586:13 [INFO] [stdout] 12: 0x55705b400b34 - std::sys_common::backtrace::__rust_end_short_backtrace::hadb599ff5bdd6123 [INFO] [stdout] at /rustc/6c20ab744b0f82646d90ce9d25894823abc9c669/library/std/src/sys_common/backtrace.rs:138:18 [INFO] [stdout] 13: 0x55705b401ff2 - rust_begin_unwind [INFO] [stdout] at /rustc/6c20ab744b0f82646d90ce9d25894823abc9c669/library/std/src/panicking.rs:584:5 [INFO] [stdout] 14: 0x55705b3aab23 - core::panicking::panic_fmt::hcf9e3bddea69ce9b [INFO] [stdout] at /rustc/6c20ab744b0f82646d90ce9d25894823abc9c669/library/core/src/panicking.rs:142:14 [INFO] [stdout] 15: 0x55705b3aa9ed - core::panicking::panic::h9b7b9144bb85627b [INFO] [stdout] at /rustc/6c20ab744b0f82646d90ce9d25894823abc9c669/library/core/src/panicking.rs:48:5 [INFO] [stdout] 16: 0x55705b3ac4fb - rust_string_random::random::h424d7190a1304ce9 [INFO] [stdout] at /opt/rustwide/workdir/src/lib.rs:52:27 [INFO] [stdout] 17: 0x55705b3ab292 - rust_out::main::_doctest_main_src_lib_rs_14_0::h73c12fe942ec6362 [INFO] [stdout] 18: 0x55705b3ab1c6 - rust_out::main::hc08e76984c2b2085 [INFO] [stdout] 19: 0x55705b3aaeb3 - core::ops::function::FnOnce::call_once::h4241b4f96347d31e [INFO] [stdout] 20: 0x55705b3aae39 - std::sys_common::backtrace::__rust_begin_short_backtrace::h342363fa52c56112 [INFO] [stdout] 21: 0x55705b3aae79 - std::rt::lang_start::{{closure}}::hea2586bee8110692 [INFO] [stdout] 22: 0x55705b3fc87a - core::ops::function::impls:: for &F>::call_once::h2032fb2878f388ae [INFO] [stdout] at /rustc/6c20ab744b0f82646d90ce9d25894823abc9c669/library/core/src/ops/function.rs:280:13 [INFO] [stdout] 23: 0x55705b3fc87a - std::panicking::try::do_call::h81e55b4ebfafb04e [INFO] [stdout] at /rustc/6c20ab744b0f82646d90ce9d25894823abc9c669/library/std/src/panicking.rs:492:40 [INFO] [stdout] 24: 0x55705b3fc87a - std::panicking::try::hced7d0ccc60af422 [INFO] [stdout] at /rustc/6c20ab744b0f82646d90ce9d25894823abc9c669/library/std/src/panicking.rs:456:19 [INFO] [stdout] 25: 0x55705b3fc87a - std::panic::catch_unwind::h999bcdb7b9e7dcf6 [INFO] [stdout] at /rustc/6c20ab744b0f82646d90ce9d25894823abc9c669/library/std/src/panic.rs:137:14 [INFO] [stdout] 26: 0x55705b3fc87a - std::rt::lang_start_internal::{{closure}}::hb513dc17c431de0d [INFO] [stdout] at /rustc/6c20ab744b0f82646d90ce9d25894823abc9c669/library/std/src/rt.rs:128:48 [INFO] [stdout] 27: 0x55705b3fc87a - std::panicking::try::do_call::h7a350cfb8efde1c6 [INFO] [stdout] at /rustc/6c20ab744b0f82646d90ce9d25894823abc9c669/library/std/src/panicking.rs:492:40 [INFO] [stdout] 28: 0x55705b3fc87a - std::panicking::try::h9815d274c9256bb2 [INFO] [stdout] at /rustc/6c20ab744b0f82646d90ce9d25894823abc9c669/library/std/src/panicking.rs:456:19 [INFO] [stdout] 29: 0x55705b3fc87a - std::panic::catch_unwind::h50b97da777fe5179 [INFO] [stdout] at /rustc/6c20ab744b0f82646d90ce9d25894823abc9c669/library/std/src/panic.rs:137:14 [INFO] [stdout] 30: 0x55705b3fc87a - std::rt::lang_start_internal::hc96aefd13d3bf34e [INFO] [stdout] at /rustc/6c20ab744b0f82646d90ce9d25894823abc9c669/library/std/src/rt.rs:128:20 [INFO] [stdout] 31: 0x55705b3aae61 - std::rt::lang_start::hdeb1dd85e09abdcb [INFO] [stdout] 32: 0x55705b3ab323 - main [INFO] [stdout] 33: 0x7f253e949083 - __libc_start_main [INFO] [stdout] 34: 0x55705b3aad6e - _start [INFO] [stdout] 35: 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 0.69s [INFO] [stdout] [INFO] [stderr] error: test failed, to rerun pass '--doc' [INFO] running `Command { std: "docker" "inspect" "d5c8ebd6172d510d39feff2c21b95f7ea8f3facb52e165e4a3b589a16b541547", kill_on_drop: false }` [INFO] running `Command { std: "docker" "rm" "-f" "d5c8ebd6172d510d39feff2c21b95f7ea8f3facb52e165e4a3b589a16b541547", kill_on_drop: false }` [INFO] [stdout] d5c8ebd6172d510d39feff2c21b95f7ea8f3facb52e165e4a3b589a16b541547