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static (?) - Codegen bug / Memory Corruption same type in Nim, different type in C

2

This is a very involved bug that requires 5 different files. The issue is that the same type is different in different files: 1. The file to run `mem_corrupt_bug.nim` ```Nim...

mratsim

Compiler segfault in codegen when putting nested importCpp type into seq

1

### Example The following code causes a segfault in the nim compiler itself. ```nim type Foo* {.importC, nodecl.} = object # doesn't matter if this is importC or importCpp value*:...

RedBeard0531

Proc argument type derived from generic type argument causes segfault in compiler. ### Example The following code results in compiler segfault: ```nim type Test[S: static[Natural]] = object proc run(self: Test,...

cmd410

Not counting other imports of these in the standard library: - [genode/env](https://github.com/nim-lang/Nim/blob/devel/lib/genode/env.nim) in: - [ ] [rawquits](https://github.com/nim-lang/Nim/blob/96d6eee9bc33c22defb980fc0953c8e55f363ab2/lib/system/rawquits.nim#L7) - [ ] [genode/alloc](https://github.com/nim-lang/Nim/blob/96d6eee9bc33c22defb980fc0953c8e55f363ab2/lib/genode/alloc.nim#L18) - [std/assertions](https://github.com/nim-lang/Nim/blob/devel/lib/std/assertions.nim) in: - [ ] [iterators](https://github.com/nim-lang/Nim/blob/96d6eee9bc33c22defb980fc0953c8e55f363ab2/lib/system/iterators.nim#L4) - [std/exitprocs](https://github.com/nim-lang/Nim/blob/devel/lib/std/exitprocs.nim)...

metagn

The nif repo (https://github.com/nim-lang/nif) is now installed as a dependency for the Nim compiler. At the moment the important tools (nifler, xelim, nifgram, gear2) are imported to test that this...

metagn

Dereferencing result of `cast` in single expression triggers unnecessary copy

4

### Description ```nim let a = new array[1000, byte] block: for _ in cast[typeof(a)](a)[]: discard block: let x = cast[typeof(a)](a) # not even var for _ in x[]: discard ```...

tersec

fix calls to implicitly generic params in generic contexts

1

There were a couple remaining bugs after #24005, #24065 for proc parameters with implicit generic types: * A new check `containsUnresolvedType` was introduced that purposefully excluded typeclasses, but implicitly generic...

metagn

No `filelock` in the nim standard library

2

### Summary I want to use the filelock function in nim, but can't found it in nim standard library. ### Description No filelock function in nim. ### Alternatives _No response_...

forchid

non-hygenic behavior for gensymmed name in template

7

### Description ```nim import std/macros macro evalOnceAs*(exp, alias: untyped): untyped = expectKind(alias, nnkIdent) let body = nnkStmtList.newTree() val = if exp.kind == nnkSym: # The symbol can be used directly...

arnetheduck

Invalid codegen / dangling pointer for openArray escaping from `block`

2

### Description The following snippet results in a dangling pointer for the array access: ```nim type ArrayBuf = object buf: array[32, byte] n: int template data*(bParam: ArrayBuf): openArray = block:...

arnetheduck