Can't createCollation

[m-lenchanteur]

Hello, I'm doing my first steps with Swift so I hope that I'm not doing things wrong but rather reporting an actual bug.

platform: Linux

I'm trying to create a collation and get a crash with this minimal example:

import SQLite

let db = try Connection(.inMemory);
try db.createCollation("NOTHING_SPECIAL") { lhs, rhs in
  return lhs.compare(rhs)
}

Crash log:

💣 Program crashed: Bad pointer dereference at 0x0000000000000040

Thread 0 "test" crashed:

0 0x00007f828e0de8d7 swift_initEnumMetadataSinglePayload + 23 in libswiftCore.so
1 0x00007f828df57c0c type metadata completion function for ClosedRange<>.Index + 59 in libswiftCore.so
2 0x00007f828e1038bf swift::MetadataCacheEntryBase<(anonymous namespace)::GenericCacheEntry, void const*>::doInitialization(swift::MetadataWaitQueue::Worker&, swift::MetadataRequest) + 270 in libswiftCore.so
3 0x00007f828e0f4144 _swift_getGenericMetadata(swift::MetadataRequest, void const* const*, swift::TargetTypeContextDescriptor<swift::InProcess> const*) + 2755 in libswiftCore.so
4 0x00007f828df692b3 __swift_instantiateCanonicalPrespecializedGenericMetadata + 34 in libswiftCore.so
5 0x00007f828dfa75fe Dictionary.subscript.setter + 45 in libswiftCore.so
6 Connection.createCollation(_:_:) + 851 in test at ..../.build/checkouts/SQLite.swift/Sources/SQLite/Core/Connection.swift:659:31

   657│             }
   658│         }, nil /* xDestroy */))
   659│         collations[collation] = box
      │                               ▲
   660│     }
   661│     fileprivate typealias Collation = @convention(block) (UnsafeRawPointer, UnsafeRawPointer) -> Int32

7 test_main + 140 in test at .../Test/test.swift:4:8

     2│
     3│ let db = try Connection(.inMemory);
     4│ try db.createCollation("NOTHING_SPECIAL") { lhs, rhs in
      │        ▲
     5│   return lhs.compare(rhs)
     6│ }

8 0x00007f828c95c6b5 <unknown> in libc.so.6
9 0x00007f828c95c769 <unknown> in libc.so.6

By the way, I've found the syntax .order(collate(.custom("NODIACRITIC"), name)) in the docs but couldn't get it to work. Isn't it .order(name.collate(.custom("NODIACRITIC"))) now ?