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Very old mm:arc ICE: not containsManagedMemory(n.typ) [AssertionDefect]

Status: Open.

#25910 In nim-lang/Nim;

· mgambrell opened on Jun 13, 2026

Regression from 2.2.10 to version-2-2/devel with {.pure.} enum and generic inline iterator

Status: Open.

#25908 In nim-lang/Nim;

· tersec opened on Jun 12, 2026

[GCC only] C codegen bug - extra brace group at end of initializer

Code Generation

OS/Architecture Specific

Status: Open.

#25886 In nim-lang/Nim;

· mratsim opened on Jun 9, 2026

C codegen bug: name mangling collision with nested tuples of matching flattened types

Code Generation

Status: Open.

#25883 In nim-lang/Nim;

· mratsim opened on Jun 9, 2026

Path expressions cannot derive from thread-local var in global scope.

Status: Open.

#25873 In nim-lang/Nim;

· 2LeoCode opened on Jun 4, 2026

Compile error from Clang when passing a procedural type with var return type

Status: Open.

#25870 In nim-lang/Nim;

· demotomohiro opened on Jun 3, 2026

static named tuples: cannot access through field names

Static[T]

Symbol Resolution

Templates

Status: Open.

Bug

#25868 In nim-lang/Nim;

· mratsim opened on Jun 3, 2026

Size of codegenDecl object is incorrect

Status: Open.

#25867 In nim-lang/Nim;

· PMunch opened on Jun 3, 2026

incompleteStruct ignored without importc

Status: Open.

#25866 In nim-lang/Nim;

· PMunch opened on Jun 3, 2026

Procedural types with lent return type generates invalid C++ code

Status: Open.

#25863 In nim-lang/Nim;

· demotomohiro opened on Jun 2, 2026

Allow type classes in except

Status: Open.

#25854 In nim-lang/Nim;

· arnetheduck opened on Jun 1, 2026

Named tuple of typeclass is not a concrete type

Generics

Type Inference

Type Sections

Status: Open.

#25853 In nim-lang/Nim;

· mratsim opened on May 31, 2026