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Backport "Fail early & more clearly on shaded-broken classfiles" to LTS #22083

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Merged
merged 1 commit into from
Dec 3, 2024
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Backport "Fail early & more clearly on shaded-broken classfiles" to LTS #22083

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5 changes: 4 additions & 1 deletion compiler/src/dotty/tools/dotc/core/classfile/ClassfileParser.scala
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Original file line number Diff line number Diff line change
Expand Up @@ -1039,7 +1039,10 @@ class ClassfileParser(
// attribute isn't, this classfile is a compilation artifact.
return Some(NoEmbedded)

if (scan(tpnme.ScalaSignatureATTR) && scan(tpnme.RuntimeVisibleAnnotationATTR)) {
if (scan(tpnme.ScalaSignatureATTR)) {
if !scan(tpnme.RuntimeVisibleAnnotationATTR) then
report.error(em"No RuntimeVisibleAnnotations in classfile with ScalaSignature attribute: ${classRoot.fullName}")
return None
val attrLen = in.nextInt
val nAnnots = in.nextChar
var i = 0
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