Coverage difference with Scala 2 library TASTy

[nicolasstucki]

Disabled tests

https://github.com/lampepfl/dotty/blob/16f1680ffb07026309f1a5287bdd12cda14db068/compiler/test/dotty/tools/dotc/coverage/CoverageTests.scala#L31-L36

https://github.com/lampepfl/dotty/blob/16f1680ffb07026309f1a5287bdd12cda14db068/compiler/test/dotty/tools/dotc/coverage/CoverageTests.scala#L39-L44

How to reproduce

First remove the assumeFalse(..., Properties.usingScalaLibraryTasty) from CoverageTests, and then

$ sbt
> set ThisBuild/Build.useScala2LibraryTasty := true
> scala3-bootstrapped/testOnly dotty.tools.dotc.coverage.CoverageTests

Output

The following checkfiles have some differences.

tests/coverage/run/i16940/i16940.scoverage.check

@@ -196,6 +196,23 @@ Object
 <empty>.Test$
 <init>
 539
+540
+25
+DurationInt
+Apply
+false
+0
+false
+3
+

+11
+i16940/i16940.scala
+<empty>
+Test$
+Object
+<empty>.Test$
+<init>
+539
 548
 25
 seconds
@@ -205,7 +222,7 @@ false
 false
 3.seconds
 

-11
+12
 i16940/i16940.scala
 <empty>
 i16940$package$
@@ -222,7 +239,7 @@ false
 false
 Future {\n  if (option) {\n    Thread.sleep(500)\n  }\n  synchronized {\n    val tmp = test\n    Thread.sleep(1000)\n    test = tmp + 1\n  }\n}
 

-12
+13
 i16940/i16940.scala
 <empty>
 i16940$package$
@@ -239,7 +256,7 @@ false
 false
 Thread.sleep(500)
 

-13
+14
 i16940/i16940.scala
 <empty>
 i16940$package$
@@ -256,7 +273,7 @@ true
 false
 {\n    Thread.sleep(500)\n  }
 

-14
+15
 i16940/i16940.scala
 <empty>
 i16940$package$
@@ -273,7 +290,7 @@ true
 false
 
 

-15
+16
 i16940/i16940.scala
 <empty>
 i16940$package$
@@ -290,7 +307,7 @@ false
 false
 synchronized {\n    val tmp = test\n    Thread.sleep(1000)\n    test = tmp + 1\n  }
 

-16
+17
 i16940/i16940.scala
 <empty>
 i16940$package$
@@ -307,7 +324,7 @@ false
 false
 Thread.sleep(1000)
 

-17
+18
 i16940/i16940.scala
 <empty>
 i16940$package$

tests/coverage/pos/TypeLambdas.scoverage.check

@@ -59,6 +59,23 @@ TypeLambdas$
 Object
 covtest.TypeLambdas$
 test
+310
+311
+14
+ArrowAssoc
+Apply
+false
+0
+false
+1
+

+3
+TypeLambdas.scala
+covtest
+TypeLambdas$
+Object
+covtest.TypeLambdas$
+test
 324
 334
 15
@@ -69,7 +86,7 @@ false
 false
 println(m)
 

-3
+4
 TypeLambdas.scala
 covtest
 TypeLambdas$
@@ -86,7 +103,7 @@ false
 false
 println(tuple)
 

-4
+5
 TypeLambdas.scala
 covtest
 TypeLambdas$