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Nim is a statically typed compiled systems programming language. It combines successful concepts from mature languages like Python, Ada and Modula. Its design focuses on efficiency, expressiveness, an...

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remove lock levels logic while keeping locks sections ref https://github.com/nim-lang/RFCs/issues/437

Ready For Review
Requires Araq

fixes #18983 fixes #5282 fixes #13008 todo - [x] tests

Using a `map` function with a variable under `walkDirRec` iterator caused a compile error. ### Example The below snippet itself does not make sense because I made up it for...

Iterators

fixes #20162 Actually `nkPar` should be diabled for tuple construction, otherwise it probably breaks things.

v2

### What happened? here I get 8x slow down when I switch to `--mm:arc`. ```nim import std/sugar import benchy proc toIter*[T](s: Slice[T]): iterator: T = iterator it: T {.closure.} =...

Regression
Performance
ARC/ORC

ref https://github.com/nim-lang/Nim/pull/2139 It seems that it was probably caused by copy pasting. ![image](https://user-images.githubusercontent.com/43030857/183306280-3f2bddee-2490-4582-9205-7fb2a3d7d1d3.png)

fixes #19782 The bug involved caused the uri.`?` concatenate function to overwrite current query data. The new implementation adds a check too ensure the data is not lost. Also added...

closes https://github.com/nim-lang/RFCs/issues/463 todo - [ ] tests - [ ] changelog - [ ] better error messages - [ ] make logic robust - [ ] allow specifying the nim...

### What happened? hey, I have a super weird bug, I wrote two functions: `encrypt_cbc` and `decrypt_cbc` (both uses the `nimcrypto `package) - they both get the following parameters `(string,...