join ops before in format

[blaginin]

when there are several subscribers, i get:

 thread '...' (7476) panicked at /home/runner/.cargo/registry/src/index.crates.io-1949cf8c6b5b557f/itertools-0.14.0/src/format.rs:95:21:
    Format: was already formatted once
    stack backtrace:
       0: std::panicking::begin_panic
                 at /rustc/c23ed3ef28b3cc30658310f771ddc66e5b687cf4/library/std/src/panicking.rs:762:5
       1: <itertools::format::Format<core::slice::iter::Iter<alloc::string::String>>>::format
                 at /home/runner/.cargo/registry/src/index.crates.io-1949cf8c6b5b557f/itertools-0.14.0/src/format.rs:95:21
       2: <itertools::format::Format<core::slice::iter::Iter<alloc::string::String>> as core::fmt::Display>::fmt
                 at /home/runner/.cargo/registry/src/index.crates.io-1949cf8c6b5b557f/itertools-0.14.0/src/format.rs:119:26
       3: core::fmt::rt::Argument::fmt
                 at /rustc/c23ed3ef28b3cc30658310f771ddc66e5b687cf4/library/core/src/fmt/rt.rs:152:76
       4: core::fmt::write
       5: <&dyn core::fmt::Debug as core::fmt::Debug>::fmt
                 at /home/runner/.rustup/toolchains/nightly-2025-11-24-x86_64-unknown-linux-gnu/lib/rustlib/src/rust/library/core/src/fmt/mod.rs:2865:62
       6: core::fmt::rt::Argument::fmt
                 at /rustc/c23ed3ef28b3cc30658310f771ddc66e5b687cf4/library/core/src/fmt/rt.rs:152:76
       7: core::fmt::write
       8: <&mut tracing_subscriber::fmt::format::escape::EscapingWriter as core::fmt::Write::write_fmt::SpecWriteFmt>::spec_write_fmt
                 at /home/runner/.rustup/toolchains/nightly-2025-11-24-x86_64-unknown-linux-gnu/lib/rustlib/src/rust/library/core/src/fmt/mod.rs:236:21
       9: <tracing_subscriber::fmt::format::escape::EscapingWriter as core::fmt::Write>::write_fmt
                 at /home/runner/.rustup/toolchains/nightly-2025-11-24-x86_64-unknown-linux-gnu/lib/rustlib/src/rust/library/core/src/fmt/mod.rs:241:14
      10: <tracing_subscriber::fmt::format::escape::Escape<&dyn core::fmt::Debug> as core::fmt::Debug>::fmt
                 at /home/runner/.cargo/registry/src/index.crates.io-1949cf8c6b5b557f/tracing-subscriber-0.3.22/src/fmt/format/escape.rs:42:9
      11: core::fmt::rt::Argument::fmt
                 at /rustc/c23ed3ef28b3cc30658310f771ddc66e5b687cf4/library/core/src/fmt/rt.rs:152:76
      12: core::fmt::write
      13: <&mut alloc::string::String as core::fmt::Write::write_fmt::SpecWriteFmt>::spec_write_fmt

[joseph-isaacs]

can we do this without a string alloc?

[codspeed-hq]

CodSpeed Performance Report

Merging this PR will degrade performance by 25.39%

_{Comparing db/fix-format (25f3912) with develop (28acfa4)}

Summary

❌ 1 regressed benchmark
✅ 1137 untouched benchmarks
⏩ 1265 skipped benchmarks¹

⚠️ Please fix the performance issues or acknowledge them on CodSpeed.

Performance Changes

	Mode	Benchmark	BASE	HEAD	Efficiency
❌	Simulation	chunked_bool_into_canonical[(1000, 10)]	66 µs	88.4 µs	-25.39%

Footnotes

1. 1265 benchmarks were skipped, so the baseline results were used instead. If they were deleted from the codebase, click here and archive them to remove them from the performance reports. ↩

[codspeed-hq]

Unable to generate the performance report

There was an internal error while processing the run's data. We're working on fixing the issue. Feel free to contact us on Discord or at support@codspeed.io if the issue persists.

[joseph-isaacs]

self.ops.iter().format("\n") with itertools?

[blaginin]

that's why this bug happened in the first place :D similar to prefix-dev/pixi#4938

[joseph-isaacs]

I thought this was fixed?

[joseph-isaacs]

haha okay