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Fix uninitializing fields when evaluating a cached constructor call in global initialization checker #21403

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merged 2 commits into from
Aug 20, 2024
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Fix uninitializing fields when evaluating a cached constructor call in global initialization checker #21403

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a722358
Fix uninitializing fields when evaluating a cached constructor call
Aug 20, 2024
36b4949
Address comment
Aug 20, 2024
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1 change: 0 additions & 1 deletion compiler/src/dotty/tools/dotc/transform/init/Objects.scala
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Original file line number Diff line number Diff line change
Expand Up @@ -950,7 +950,6 @@ class Objects(using Context @constructorOnly):

val instance = OfClass(klass, outerWidened, ctor, args.map(_.value), envWidened)
callConstructor(instance, ctor, args)
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I'd add a comment above callConstructor and refer to the test. Something like the following:

// The actual instance might be cached without running the constructor. 
// See tests/init-global/pos/cache-constructor.scala

instance

case ValueSet(values) =>
values.map(ref => instantiate(ref, klass, ctor, args)).join
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9 changes: 9 additions & 0 deletions tests/init-global/pos/cache-constructor.scala
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@@ -0,0 +1,9 @@
class Bar:
var f: Int = 0

object A:
val b1 = new Bar()
val b2 = new Bar()
val b3 = new Bar()
b3.f = 1

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Minor: trailing spaces in file.

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