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EnC: workaround for empty display class #73366

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May 9, 2024
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EnC: workaround for empty display class #73366

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9 changes: 8 additions & 1 deletion src/Compilers/Core/Portable/Emit/EditAndContinue/DefinitionMap.cs
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Original file line number Diff line number Diff line change
Expand Up @@ -588,7 +588,14 @@ void recurse(ImmutableArray<ISymbolInternal> members, DebugId? containingDisplay
Debug.Assert(!containingDisplayClassId.HasValue);

var displayClass = (INamedTypeSymbolInternal)member;
var displayClassMembers = (synthesizedMemberMap != null) ? synthesizedMemberMap[displayClass] : displayClass.GetMembers();

// Synthesized member map, if given, contains all the synthesized members that implement lambdas and closures.
// If not given (for PE symbols) the members are defined on the type symbol directly.
// If the display class doesn't have any synthesized members it won't be present in the map.
// See https://github.com/dotnet/roslyn/issues/73365
var displayClassMembers = synthesizedMemberMap != null
? (synthesizedMemberMap.TryGetValue(displayClass, out var m) ? m : [])
: displayClass.GetMembers();

if (displayClass.TypeKind == TypeKind.Struct)
{
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