[INFO] fetching crate string32 0.2.0... [INFO] testing string32-0.2.0 against master#c90bcb9571b7aab0d8beaa2ce8a998ffaf079d38 for pr-146098-8 [INFO] extracting crate string32 0.2.0 into /workspace/builds/worker-4-tc1/source [INFO] started tweaking crates.io crate string32 0.2.0 [INFO] finished tweaking crates.io crate string32 0.2.0 [INFO] tweaked toml for crates.io crate string32 0.2.0 written to /workspace/builds/worker-4-tc1/source/Cargo.toml [INFO] validating manifest of crates.io crate string32 0.2.0 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] [stderr] Downloading crates ... [INFO] [stderr] Downloaded usize_cast v1.1.0 [INFO] [stderr] Downloaded mediumvec v1.3.1 [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@sha256:4848fb76d95f26979359cc7e45710b1dbc8f3acb7aeedee7c460d7702230f228" "/opt/rustwide/cargo-home/bin/cargo" "+c90bcb9571b7aab0d8beaa2ce8a998ffaf079d38" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }` [INFO] [stdout] ac371b0bf4694da5afd4827e0f8aad2f6f56348e5347b86150d6de3be5c74869 [INFO] running `Command { std: "docker" "start" "-a" "ac371b0bf4694da5afd4827e0f8aad2f6f56348e5347b86150d6de3be5c74869", kill_on_drop: false }` [INFO] running `Command { std: "docker" "inspect" "ac371b0bf4694da5afd4827e0f8aad2f6f56348e5347b86150d6de3be5c74869", kill_on_drop: false }` [INFO] running `Command { std: "docker" "rm" "-f" "ac371b0bf4694da5afd4827e0f8aad2f6f56348e5347b86150d6de3be5c74869", kill_on_drop: false }` [INFO] [stdout] ac371b0bf4694da5afd4827e0f8aad2f6f56348e5347b86150d6de3be5c74869 [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@sha256:4848fb76d95f26979359cc7e45710b1dbc8f3acb7aeedee7c460d7702230f228" "/opt/rustwide/cargo-home/bin/cargo" "+c90bcb9571b7aab0d8beaa2ce8a998ffaf079d38" "build" "--frozen" "--message-format=json", kill_on_drop: false }` [INFO] [stdout] 31ef41f2604f61163924dc96686a34584db367cce7eba8a171be187e7eb14669 [INFO] running `Command { std: "docker" "start" "-a" "31ef41f2604f61163924dc96686a34584db367cce7eba8a171be187e7eb14669", kill_on_drop: false }` [INFO] [stderr] Compiling usize_cast v1.1.0 [INFO] [stderr] Compiling mediumvec v1.3.1 [INFO] [stderr] Compiling string32 v0.2.0 (/opt/rustwide/workdir) [INFO] [stdout] warning: `#[must_use]` attribute cannot be used on trait methods in impl blocks [INFO] [stdout] --> src/string32.rs:386:5 [INFO] [stdout] | [INFO] [stdout] 386 | #[must_use] [INFO] [stdout] | ^^^^^^^^^^^ [INFO] [stdout] | [INFO] [stdout] = warning: this was previously accepted by the compiler but is being phased out; it will become a hard error in a future release! [INFO] [stdout] = help: `#[must_use]` can be applied to data types, foreign functions, functions, inherent methods, provided trait methods, required trait methods, traits, and unions [INFO] [stdout] = note: `#[warn(unused_attributes)]` (part of `#[warn(unused)]`) on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: `#[must_use]` attribute cannot be used on trait methods in impl blocks [INFO] [stdout] --> src/string32.rs:396:5 [INFO] [stdout] | [INFO] [stdout] 396 | #[must_use] [INFO] [stdout] | ^^^^^^^^^^^ [INFO] [stdout] | [INFO] [stdout] = warning: this was previously accepted by the compiler but is being phased out; it will become a hard error in a future release! [INFO] [stdout] = help: `#[must_use]` can be applied to data types, foreign functions, functions, inherent methods, provided trait methods, required trait methods, traits, and unions [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: hiding a lifetime that's elided elsewhere is confusing [INFO] [stdout] --> src/str32.rs:138:18 [INFO] [stdout] | [INFO] [stdout] 138 | pub fn chars(&self) -> std::str::Chars { [INFO] [stdout] | ^^^^^ ^^^^^^^^^^^^^^^ the same lifetime is hidden here [INFO] [stdout] | | [INFO] [stdout] | the lifetime is elided here [INFO] [stdout] | [INFO] [stdout] = help: the same lifetime is referred to in inconsistent ways, making the signature confusing [INFO] [stdout] = note: `#[warn(mismatched_lifetime_syntaxes)]` on by default [INFO] [stdout] help: use `'_` for type paths [INFO] [stdout] | [INFO] [stdout] 138 | pub fn chars(&self) -> std::str::Chars<'_> { [INFO] [stdout] | ++++ [INFO] [stdout] [INFO] [stdout] [INFO] [stderr] Finished `dev` profile [unoptimized + debuginfo] target(s) in 0.54s [INFO] running `Command { std: "docker" "inspect" "31ef41f2604f61163924dc96686a34584db367cce7eba8a171be187e7eb14669", kill_on_drop: false }` [INFO] running `Command { std: "docker" "rm" "-f" "31ef41f2604f61163924dc96686a34584db367cce7eba8a171be187e7eb14669", kill_on_drop: false }` [INFO] [stdout] 31ef41f2604f61163924dc96686a34584db367cce7eba8a171be187e7eb14669 [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@sha256:4848fb76d95f26979359cc7e45710b1dbc8f3acb7aeedee7c460d7702230f228" "/opt/rustwide/cargo-home/bin/cargo" "+c90bcb9571b7aab0d8beaa2ce8a998ffaf079d38" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }` [INFO] [stdout] 741069f10034789429b4267ee40e5b66b7d207f33871edb3cab11f2c4a75969e [INFO] running `Command { std: "docker" "start" "-a" "741069f10034789429b4267ee40e5b66b7d207f33871edb3cab11f2c4a75969e", kill_on_drop: false }` [INFO] [stderr] Compiling string32 v0.2.0 (/opt/rustwide/workdir) [INFO] [stdout] warning: `#[must_use]` attribute cannot be used on trait methods in impl blocks [INFO] [stdout] --> src/string32.rs:386:5 [INFO] [stdout] | [INFO] [stdout] 386 | #[must_use] [INFO] [stdout] | ^^^^^^^^^^^ [INFO] [stdout] | [INFO] [stdout] = warning: this was previously accepted by the compiler but is being phased out; it will become a hard error in a future release! [INFO] [stdout] = help: `#[must_use]` can be applied to data types, foreign functions, functions, inherent methods, provided trait methods, required trait methods, traits, and unions [INFO] [stdout] = note: `#[warn(unused_attributes)]` (part of `#[warn(unused)]`) on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: `#[must_use]` attribute cannot be used on trait methods in impl blocks [INFO] [stdout] --> src/string32.rs:396:5 [INFO] [stdout] | [INFO] [stdout] 396 | #[must_use] [INFO] [stdout] | ^^^^^^^^^^^ [INFO] [stdout] | [INFO] [stdout] = warning: this was previously accepted by the compiler but is being phased out; it will become a hard error in a future release! [INFO] [stdout] = help: `#[must_use]` can be applied to data types, foreign functions, functions, inherent methods, provided trait methods, required trait methods, traits, and unions [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: hiding a lifetime that's elided elsewhere is confusing [INFO] [stdout] --> src/str32.rs:138:18 [INFO] [stdout] | [INFO] [stdout] 138 | pub fn chars(&self) -> std::str::Chars { [INFO] [stdout] | ^^^^^ ^^^^^^^^^^^^^^^ the same lifetime is hidden here [INFO] [stdout] | | [INFO] [stdout] | the lifetime is elided here [INFO] [stdout] | [INFO] [stdout] = help: the same lifetime is referred to in inconsistent ways, making the signature confusing [INFO] [stdout] = note: `#[warn(mismatched_lifetime_syntaxes)]` on by default [INFO] [stdout] help: use `'_` for type paths [INFO] [stdout] | [INFO] [stdout] 138 | pub fn chars(&self) -> std::str::Chars<'_> { [INFO] [stdout] | ++++ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: `#[must_use]` attribute cannot be used on trait methods in impl blocks [INFO] [stdout] --> src/string32.rs:386:5 [INFO] [stdout] | [INFO] [stdout] 386 | #[must_use] [INFO] [stdout] | ^^^^^^^^^^^ [INFO] [stdout] | [INFO] [stdout] = warning: this was previously accepted by the compiler but is being phased out; it will become a hard error in a future release! [INFO] [stdout] = help: `#[must_use]` can be applied to data types, foreign functions, functions, inherent methods, provided trait methods, required trait methods, traits, and unions [INFO] [stdout] = note: `#[warn(unused_attributes)]` (part of `#[warn(unused)]`) on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: `#[must_use]` attribute cannot be used on trait methods in impl blocks [INFO] [stdout] --> src/string32.rs:396:5 [INFO] [stdout] | [INFO] [stdout] 396 | #[must_use] [INFO] [stdout] | ^^^^^^^^^^^ [INFO] [stdout] | [INFO] [stdout] = warning: this was previously accepted by the compiler but is being phased out; it will become a hard error in a future release! [INFO] [stdout] = help: `#[must_use]` can be applied to data types, foreign functions, functions, inherent methods, provided trait methods, required trait methods, traits, and unions [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: hiding a lifetime that's elided elsewhere is confusing [INFO] [stdout] --> src/str32.rs:138:18 [INFO] [stdout] | [INFO] [stdout] 138 | pub fn chars(&self) -> std::str::Chars { [INFO] [stdout] | ^^^^^ ^^^^^^^^^^^^^^^ the same lifetime is hidden here [INFO] [stdout] | | [INFO] [stdout] | the lifetime is elided here [INFO] [stdout] | [INFO] [stdout] = help: the same lifetime is referred to in inconsistent ways, making the signature confusing [INFO] [stdout] = note: `#[warn(mismatched_lifetime_syntaxes)]` on by default [INFO] [stdout] help: use `'_` for type paths [INFO] [stdout] | [INFO] [stdout] 138 | pub fn chars(&self) -> std::str::Chars<'_> { [INFO] [stdout] | ++++ [INFO] [stdout] [INFO] [stdout] [INFO] [stderr] Finished `test` profile [unoptimized + debuginfo] target(s) in 1.58s [INFO] running `Command { std: "docker" "inspect" "741069f10034789429b4267ee40e5b66b7d207f33871edb3cab11f2c4a75969e", kill_on_drop: false }` [INFO] running `Command { std: "docker" "rm" "-f" "741069f10034789429b4267ee40e5b66b7d207f33871edb3cab11f2c4a75969e", kill_on_drop: false }` [INFO] [stdout] 741069f10034789429b4267ee40e5b66b7d207f33871edb3cab11f2c4a75969e [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@sha256:4848fb76d95f26979359cc7e45710b1dbc8f3acb7aeedee7c460d7702230f228" "/opt/rustwide/cargo-home/bin/cargo" "+c90bcb9571b7aab0d8beaa2ce8a998ffaf079d38" "test" "--frozen", kill_on_drop: false }` [INFO] [stdout] 9317fb4fa4098afa231e3faf315eb5fd0fe36a8eae339202f91902d21e5f0536 [INFO] running `Command { std: "docker" "start" "-a" "9317fb4fa4098afa231e3faf315eb5fd0fe36a8eae339202f91902d21e5f0536", kill_on_drop: false }` [INFO] [stderr] warning: `#[must_use]` attribute cannot be used on trait methods in impl blocks [INFO] [stderr] --> src/string32.rs:386:5 [INFO] [stderr] | [INFO] [stderr] 386 | #[must_use] [INFO] [stderr] | ^^^^^^^^^^^ [INFO] [stderr] | [INFO] [stderr] = warning: this was previously accepted by the compiler but is being phased out; it will become a hard error in a future release! [INFO] [stderr] = help: `#[must_use]` can be applied to data types, foreign functions, functions, inherent methods, provided trait methods, required trait methods, traits, and unions [INFO] [stderr] = note: `#[warn(unused_attributes)]` (part of `#[warn(unused)]`) on by default [INFO] [stderr] [INFO] [stderr] warning: `#[must_use]` attribute cannot be used on trait methods in impl blocks [INFO] [stderr] --> src/string32.rs:396:5 [INFO] [stderr] | [INFO] [stderr] 396 | #[must_use] [INFO] [stderr] | ^^^^^^^^^^^ [INFO] [stderr] | [INFO] [stderr] = warning: this was previously accepted by the compiler but is being phased out; it will become a hard error in a future release! [INFO] [stderr] = help: `#[must_use]` can be applied to data types, foreign functions, functions, inherent methods, provided trait methods, required trait methods, traits, and unions [INFO] [stderr] [INFO] [stderr] warning: hiding a lifetime that's elided elsewhere is confusing [INFO] [stderr] --> src/str32.rs:138:18 [INFO] [stderr] | [INFO] [stderr] 138 | pub fn chars(&self) -> std::str::Chars { [INFO] [stderr] | ^^^^^ ^^^^^^^^^^^^^^^ the same lifetime is hidden here [INFO] [stderr] | | [INFO] [stderr] | the lifetime is elided here [INFO] [stderr] | [INFO] [stderr] = help: the same lifetime is referred to in inconsistent ways, making the signature confusing [INFO] [stderr] = note: `#[warn(mismatched_lifetime_syntaxes)]` on by default [INFO] [stderr] help: use `'_` for type paths [INFO] [stderr] | [INFO] [stderr] 138 | pub fn chars(&self) -> std::str::Chars<'_> { [INFO] [stderr] | ++++ [INFO] [stderr] [INFO] [stderr] warning: `string32` (lib) generated 3 warnings (run `cargo fix --lib -p string32` to apply 3 suggestions) [INFO] [stderr] warning: `string32` (lib test) generated 3 warnings (3 duplicates) [INFO] [stderr] Finished `test` profile [unoptimized + debuginfo] target(s) in 0.02s [INFO] [stderr] Running unittests src/lib.rs (/opt/rustwide/target/debug/deps/string32-9eb02be5133638ff) [INFO] [stdout] [INFO] [stdout] running 3 tests [INFO] [stdout] test tests::test_complex ... ok [INFO] [stdout] test tests::test_simple ... ok [INFO] [stdout] test tests::test_hash ... ok [INFO] [stdout] [INFO] [stdout] test result: ok. 3 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.00s [INFO] [stdout] [INFO] [stderr] Doc-tests string32 [INFO] [stdout] [INFO] [stdout] running 32 tests [INFO] [stdout] test src/str32.rs - str32::Str32::as_bytes_mut (line 59) ... ok [INFO] [stdout] test src/str32.rs - str32::Str32::to_uppercase (line 294) ... ok [INFO] [stdout] test src/str32.rs - str32::Str32::trim (line 339) ... ok [INFO] [stdout] test src/str32.rs - str32::Str32::len (line 110) ... ok [INFO] [stdout] test src/str32.rs - str32::Str32::as_bytes (line 44) ... ok [INFO] [stdout] test src/str32.rs - str32::Str32::as_str (line 23) ... ok [INFO] [stdout] test src/str32.rs - str32::Str32::to_ascii_uppercase (line 324) ... ok [INFO] [stdout] test src/str32.rs - str32::Str32::trim_start (line 354) ... ok [INFO] [stdout] test src/str32.rs - str32::Str32::to_ascii_lowercase (line 309) ... ok [INFO] [stdout] test src/string32.rs - string32::String32::capacity (line 57) ... ok [INFO] [stdout] test src/str32.rs - str32::Str32::make_ascii_lowercase (line 228) ... ok [INFO] [stdout] test src/str32.rs - str32::Str32::trim_end (line 369) ... ok [INFO] [stdout] test src/str32.rs - str32::Str32::make_ascii_uppercase (line 243) ... ok [INFO] [stdout] test src/str32.rs - str32::Str32::is_empty (line 125) ... ok [INFO] [stdout] test src/string32.rs - string32::String32::as_string (line 77) ... ok [INFO] [stdout] test src/str32.rs - str32::Str32::to_lowercase (line 279) ... ok [INFO] [stdout] test src/string32.rs - string32::String32::into_boxed_str (line 301) ... ok [INFO] [stdout] test src/string32.rs - string32::String32::insert_str (line 193) ... ok [INFO] [stdout] test src/string32.rs - string32::String32::insert (line 174) ... ok [INFO] [stdout] test src/string32.rs - string32::String32::pop (line 136) ... ok [INFO] [stdout] test src/string32.rs - string32::String32::into_bytes (line 285) ... ok [INFO] [stdout] test src/string32.rs - string32::String32::shrink_to_fit (line 241) ... ok [INFO] [stdout] test src/string32.rs - string32::String32::reserve_exact (line 227) ... ok [INFO] [stdout] test src/string32.rs - string32::String32::reserve (line 211) ... ok [INFO] [stdout] test src/string32.rs - string32::String32::remove (line 155) ... ok [INFO] [stdout] test src/string32.rs - string32::String32::new (line 28) ... ok [INFO] [stdout] test src/string32.rs - string32::String32::push_str (line 119) ... ok [INFO] [stdout] test src/string32.rs - string32::String32::push (line 101) ... ok [INFO] [stdout] test src/string32.rs - string32::String32::truncate (line 255) ... ok [INFO] [stdout] test src/string32.rs - string32::String32::with_capacity (line 41) ... ok [INFO] [stdout] test src/string32.rs - string32::String32::clear (line 270) ... FAILED [INFO] [stdout] test src/string32.rs - string32::String32::split_off (line 320) ... ok [INFO] [stdout] [INFO] [stdout] failures: [INFO] [stdout] [INFO] [stdout] ---- src/string32.rs - string32::String32::clear (line 270) stdout ---- [INFO] [stdout] Test executable failed (signal: 6 (SIGABRT) (core dumped)). [INFO] [stdout] [INFO] [stdout] stderr: [INFO] [stdout] [INFO] [stdout] thread 'main' (849) panicked at /opt/rustwide/cargo-home/registry/src/index.crates.io-1949cf8c6b5b557f/mediumvec-1.3.1/src/vec32.rs:293:41: [INFO] [stdout] unsafe precondition(s) violated: slice::get_unchecked_mut requires that the index is within the slice [INFO] [stdout] [INFO] [stdout] This indicates a bug in the program. This Undefined Behavior check is optional, and cannot be relied on for safety. [INFO] [stdout] stack backtrace: [INFO] [stdout] 0: 0x575396101e42 - std::backtrace_rs::backtrace::libunwind::trace::ha50a1f28c7a10cf8 [INFO] [stdout] at /rustc/c90bcb9571b7aab0d8beaa2ce8a998ffaf079d38/library/std/src/../../backtrace/src/backtrace/libunwind.rs:117:9 [INFO] [stdout] 1: 0x575396101e42 - std::backtrace_rs::backtrace::trace_unsynchronized::h34f8c4ec82a320bc [INFO] [stdout] at /rustc/c90bcb9571b7aab0d8beaa2ce8a998ffaf079d38/library/std/src/../../backtrace/src/backtrace/mod.rs:66:14 [INFO] [stdout] 2: 0x575396101e42 - std::sys::backtrace::_print_fmt::h2d23e84e13d343bc [INFO] [stdout] at /rustc/c90bcb9571b7aab0d8beaa2ce8a998ffaf079d38/library/std/src/sys/backtrace.rs:66:9 [INFO] [stdout] 3: 0x575396101e42 - ::fmt::hde21067283f7e82e [INFO] [stdout] at /rustc/c90bcb9571b7aab0d8beaa2ce8a998ffaf079d38/library/std/src/sys/backtrace.rs:39:26 [INFO] [stdout] 4: 0x5753961109df - core::fmt::rt::Argument::fmt::he65307037dca33c6 [INFO] [stdout] at /rustc/c90bcb9571b7aab0d8beaa2ce8a998ffaf079d38/library/core/src/fmt/rt.rs:173:76 [INFO] [stdout] 5: 0x5753961109df - core::fmt::write::h24186904251c31cb [INFO] [stdout] at /rustc/c90bcb9571b7aab0d8beaa2ce8a998ffaf079d38/library/core/src/fmt/mod.rs:1469:25 [INFO] [stdout] 6: 0x5753960e0b43 - std::io::default_write_fmt::hdc5d19b6df666f61 [INFO] [stdout] at /rustc/c90bcb9571b7aab0d8beaa2ce8a998ffaf079d38/library/std/src/io/mod.rs:639:11 [INFO] [stdout] 7: 0x5753960e0b43 - std::io::Write::write_fmt::h3ab9f1f4d8d19b72 [INFO] [stdout] at /rustc/c90bcb9571b7aab0d8beaa2ce8a998ffaf079d38/library/std/src/io/mod.rs:1954:13 [INFO] [stdout] 8: 0x5753960e5be2 - std::sys::backtrace::BacktraceLock::print::he038489aba5894a6 [INFO] [stdout] at /rustc/c90bcb9571b7aab0d8beaa2ce8a998ffaf079d38/library/std/src/sys/backtrace.rs:42:9 [INFO] [stdout] 9: 0x5753960e740c - std::panicking::default_hook::{{closure}}::h80a26d916c49679b [INFO] [stdout] at /rustc/c90bcb9571b7aab0d8beaa2ce8a998ffaf079d38/library/std/src/panicking.rs:301:27 [INFO] [stdout] 10: 0x5753960e7266 - std::panicking::default_hook::he2e9efee79b3dce9 [INFO] [stdout] at /rustc/c90bcb9571b7aab0d8beaa2ce8a998ffaf079d38/library/std/src/panicking.rs:328:9 [INFO] [stdout] 11: 0x5753960e79e5 - std::panicking::panic_with_hook::hf5648b7cec6bc73e [INFO] [stdout] at /rustc/c90bcb9571b7aab0d8beaa2ce8a998ffaf079d38/library/std/src/panicking.rs:834:13 [INFO] [stdout] 12: 0x5753960e7846 - std::panicking::panic_handler::{{closure}}::h1b2ed3864ba94359 [INFO] [stdout] at /rustc/c90bcb9571b7aab0d8beaa2ce8a998ffaf079d38/library/std/src/panicking.rs:700:13 [INFO] [stdout] 13: 0x5753960e5d19 - std::sys::backtrace::__rust_end_short_backtrace::hd0186b2b27f5aaa7 [INFO] [stdout] at /rustc/c90bcb9571b7aab0d8beaa2ce8a998ffaf079d38/library/std/src/sys/backtrace.rs:174:18 [INFO] [stdout] 14: 0x5753960d580d - __rustc[f7dae8b92efe1d7a]::rust_begin_unwind [INFO] [stdout] at /rustc/c90bcb9571b7aab0d8beaa2ce8a998ffaf079d38/library/std/src/panicking.rs:698:5 [INFO] [stdout] 15: 0x57539611376d - core::panicking::panic_nounwind_fmt::runtime::hd682c7f4ebed7044 [INFO] [stdout] at /rustc/c90bcb9571b7aab0d8beaa2ce8a998ffaf079d38/library/core/src/panicking.rs:122:22 [INFO] [stdout] 16: 0x57539611376d - core::panicking::panic_nounwind_fmt::he05c47de4e511442 [INFO] [stdout] at /rustc/c90bcb9571b7aab0d8beaa2ce8a998ffaf079d38/library/core/src/intrinsics/mod.rs:2439:9 [INFO] [stdout] 17: 0x5753960d4d0c - >::get_unchecked_mut::precondition_check::h29b106525aba9d5b [INFO] [stdout] at /rustc/c90bcb9571b7aab0d8beaa2ce8a998ffaf079d38/library/core/src/ub_checks.rs:73:21 [INFO] [stdout] 18: 0x5753960d4c59 - >::get_unchecked_mut::h20421e3b7a0194eb [INFO] [stdout] at /rustc/c90bcb9571b7aab0d8beaa2ce8a998ffaf079d38/library/core/src/ub_checks.rs:78:17 [INFO] [stdout] 19: 0x5753960d3ea9 - core::slice::::get_unchecked_mut::h63f91e6412e60560 [INFO] [stdout] at /rustc/c90bcb9571b7aab0d8beaa2ce8a998ffaf079d38/library/core/src/slice/mod.rs:689:30 [INFO] [stdout] 20: 0x5753960d51b4 - mediumvec::vec32::Vec32::truncate::hfb2ed9c57b58816e [INFO] [stdout] at /opt/rustwide/cargo-home/registry/src/index.crates.io-1949cf8c6b5b557f/mediumvec-1.3.1/src/vec32.rs:293:41 [INFO] [stdout] 21: 0x5753960d4f3d - mediumvec::vec32::Vec32::clear::h66cf214be8edf677 [INFO] [stdout] at /opt/rustwide/cargo-home/registry/src/index.crates.io-1949cf8c6b5b557f/mediumvec-1.3.1/src/vec32.rs:279:14 [INFO] [stdout] 22: 0x5753960d375b - string32::string32::String32::clear::h1b1cf24d46db3342 [INFO] [stdout] at /opt/rustwide/workdir/src/string32.rs:278:16 [INFO] [stdout] 23: 0x5753960d2be8 - rust_out::main::_doctest_main_src_string32_rs_270_0::h3c96c7725a28c3aa [INFO] [stdout] 24: 0x5753960d2b46 - rust_out::main::hbdf05be24bd65ee6 [INFO] [stdout] 25: 0x5753960d2aa3 - core::ops::function::FnOnce::call_once::h1e8c751e4a62d14e [INFO] [stdout] 26: 0x5753960d2a86 - std::sys::backtrace::__rust_begin_short_backtrace::h6f205b09ee900b2a [INFO] [stdout] 27: 0x5753960d2a69 - std::rt::lang_start::{{closure}}::h374dad1e7f5efc95 [INFO] [stdout] 28: 0x5753960e1c60 - core::ops::function::impls:: for &F>::call_once::h8434f550918e723f [INFO] [stdout] at /rustc/c90bcb9571b7aab0d8beaa2ce8a998ffaf079d38/library/core/src/ops/function.rs:287:21 [INFO] [stdout] 29: 0x5753960e1c60 - std::panicking::catch_unwind::do_call::h7f7a838f33db43be [INFO] [stdout] at /rustc/c90bcb9571b7aab0d8beaa2ce8a998ffaf079d38/library/std/src/panicking.rs:590:40 [INFO] [stdout] 30: 0x5753960e1c60 - std::panicking::catch_unwind::hf345702047129f6d [INFO] [stdout] at /rustc/c90bcb9571b7aab0d8beaa2ce8a998ffaf079d38/library/std/src/panicking.rs:553:19 [INFO] [stdout] 31: 0x5753960e1c60 - std::panic::catch_unwind::h42f92c278294a3a0 [INFO] [stdout] at /rustc/c90bcb9571b7aab0d8beaa2ce8a998ffaf079d38/library/std/src/panic.rs:359:14 [INFO] [stdout] 32: 0x5753960e1c60 - std::rt::lang_start_internal::{{closure}}::ha6834eab5ce60f45 [INFO] [stdout] at /rustc/c90bcb9571b7aab0d8beaa2ce8a998ffaf079d38/library/std/src/rt.rs:175:24 [INFO] [stdout] 33: 0x5753960e1c60 - std::panicking::catch_unwind::do_call::hf4afda32c60c9e55 [INFO] [stdout] at /rustc/c90bcb9571b7aab0d8beaa2ce8a998ffaf079d38/library/std/src/panicking.rs:590:40 [INFO] [stdout] 34: 0x5753960e1c60 - std::panicking::catch_unwind::hbfda5503aab4db1e [INFO] [stdout] at /rustc/c90bcb9571b7aab0d8beaa2ce8a998ffaf079d38/library/std/src/panicking.rs:553:19 [INFO] [stdout] 35: 0x5753960e1c60 - std::panic::catch_unwind::h1a1ed11560d244f4 [INFO] [stdout] at /rustc/c90bcb9571b7aab0d8beaa2ce8a998ffaf079d38/library/std/src/panic.rs:359:14 [INFO] [stdout] 36: 0x5753960e1c60 - std::rt::lang_start_internal::h1f713c0146d469ad [INFO] [stdout] at /rustc/c90bcb9571b7aab0d8beaa2ce8a998ffaf079d38/library/std/src/rt.rs:171:5 [INFO] [stdout] 37: 0x5753960d2a51 - std::rt::lang_start::h25a068bab729a087 [INFO] [stdout] 38: 0x5753960d2cb5 - main [INFO] [stdout] 39: 0x7824203351ca - [INFO] [stdout] 40: 0x78242033528b - __libc_start_main [INFO] [stdout] 41: 0x5753960d2965 - _start [INFO] [stdout] 42: 0x0 - [INFO] [stdout] thread caused non-unwinding panic. aborting. [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] failures: [INFO] [stdout] src/string32.rs - string32::String32::clear (line 270) [INFO] [stdout] [INFO] [stdout] test result: FAILED. 31 passed; 1 failed; 0 ignored; 0 measured; 0 filtered out; finished in 1.10s [INFO] [stdout] [INFO] [stderr] error: doctest failed, to rerun pass `--doc` [INFO] running `Command { std: "docker" "inspect" "9317fb4fa4098afa231e3faf315eb5fd0fe36a8eae339202f91902d21e5f0536", kill_on_drop: false }` [INFO] running `Command { std: "docker" "rm" "-f" "9317fb4fa4098afa231e3faf315eb5fd0fe36a8eae339202f91902d21e5f0536", kill_on_drop: false }` [INFO] [stdout] 9317fb4fa4098afa231e3faf315eb5fd0fe36a8eae339202f91902d21e5f0536