Maximum allowed size of base type in arrays is different in NativeAOT

@MichalStrehovsky

In CoreCLR, the maximum allowed size of the base type in an array is 65535, so that this is okay:

var array = new Foo[1];
Console.WriteLine(array);

[InlineArray(65535)]
struct Foo { private byte _first; }

With NativeAOT the above limit becomes 65534 somehow so that it will fail at runtime with:

Unhandled exception. System.TypeLoadException: Array of type 'Foo' from assembly 'ConsoleApp1' cannot be created because base value type is too large.

/cc: @MichalStrehovsky

@agocke

Tagging subscribers to this area: @agocke, @dotnet/ilc-contrib
See info in area-owners.md if you want to be subscribed.

Fixed in #130019.

Navigation Menu

Repository navigation

Maximum allowed size of base type in arrays is different in NativeAOT #130018

Metadata

Assignees

Labels

Type

Projects

Milestone

Relationships

Development

Maximum allowed size of base type in arrays is different in NativeAOT #130018

Description

Activity

dotnet-policy-service commented on Jun 30, 2026

MichalStrehovsky commented on Jul 1, 2026

Metadata

Metadata

Assignees

Labels

Type

Projects

Milestone

Relationships

Development

Issue actions