"java.nio.file.InvalidPathException: Illegal char <<> at index 0: <macro>" on Windows for code that produces warning when compiled by a macro #6720
Description
Ref #5994
Steps
Using SBT 1.5.5 and Scala 2.13.7, define a macro that just leaves the expression under expansion unchanged:
package test
import scala.language.experimental.macros
import scala.reflect.macros.blackbox
object Test {
def apply(v: Any): Any = macro TestImpl.test
}
object TestImpl {
def test(c: blackbox.Context)(v: c.Tree): c.Tree = v
}Apply the macro as in the following ScalaTest test case:
package test
import org.scalatest.flatspec.AnyFlatSpec
import org.scalatest.matchers.should.Matchers
class TestSpec extends AnyFlatSpec with Matchers {
"test" should "compile" in {
"Test { new { val v = 1 } with AnyRef }" should compile
}
}Problem
On Windows, the code crashes the compilation. May be related to #5994 (but this is supposed to be fixed).
Stack trace
## Exception when compiling 1 sources
java.nio.file.InvalidPathException: Illegal char <<> at index 0: <macro>
java.base/sun.nio.fs.WindowsPathParser.normalize(WindowsPathParser.java:182)
java.base/sun.nio.fs.WindowsPathParser.parse(WindowsPathParser.java:153)
java.base/sun.nio.fs.WindowsPathParser.parse(WindowsPathParser.java:77)
java.base/sun.nio.fs.WindowsPath.parse(WindowsPath.java:92)
java.base/sun.nio.fs.WindowsFileSystem.getPath(WindowsFileSystem.java:229)
java.base/java.nio.file.Path.of(Path.java:147)
java.base/java.nio.file.Paths.get(Paths.java:69)
sbt.internal.inc.MappedVirtualFile$.toPath(MappedVirtualFile.scala:36)
sbt.internal.inc.MappedFileConverter.toPath(MappedVirtualFile.scala:53)
sbt.internal.server.BuildServerReporterImpl.$anonfun$publishDiagnostic$2(BuildServerReporter.scala:120)
sbt.internal.server.BuildServerReporterImpl.$anonfun$publishDiagnostic$2$adapted(BuildServerReporter.scala:118)
scala.Option.foreach(Option.scala:407)
sbt.internal.server.BuildServerReporterImpl.$anonfun$publishDiagnostic$1(BuildServerReporter.scala:118)
sbt.internal.server.BuildServerReporterImpl.$anonfun$publishDiagnostic$1$adapted(BuildServerReporter.scala:117)
scala.Option.foreach(Option.scala:407)
sbt.internal.server.BuildServerReporterImpl.publishDiagnostic(BuildServerReporter.scala:117)
sbt.internal.server.BuildServerReporter.log(BuildServerReporter.scala:62)
sbt.internal.server.BuildServerReporter.log$(BuildServerReporter.scala:55)
sbt.internal.server.BuildServerReporterImpl.log(BuildServerReporter.scala:70)
xsbt.DelegatingReporter.info0(DelegatingReporter.scala:185)
scala.tools.nsc.reporters.MakeFilteringForwardingReporter.doReport(ForwardingReporter.scala:59)
scala.tools.nsc.reporters.FilteringReporter.info0(Reporter.scala:104)
scala.reflect.internal.Reporter.filteredInfo(Reporting.scala:116)
scala.reflect.internal.Reporter.warning(Reporting.scala:110)
scala.tools.nsc.Reporting$PerRunReporting.issueWarning(Reporting.scala:118)
scala.tools.nsc.Reporting$PerRunReporting.$anonfun$runFinished$2(Reporting.scala:85)
scala.tools.nsc.Reporting$PerRunReporting.$anonfun$runFinished$2$adapted(Reporting.scala:85)
scala.collection.mutable.LinkedHashSet.foreach(LinkedHashSet.scala:127)
scala.tools.nsc.Reporting$PerRunReporting.$anonfun$runFinished$1(Reporting.scala:85)
scala.tools.nsc.Reporting$PerRunReporting.$anonfun$runFinished$1$adapted(Reporting.scala:85)
scala.collection.IterableOnceOps.foreach(IterableOnce.scala:563)
scala.collection.IterableOnceOps.foreach$(IterableOnce.scala:561)
scala.collection.AbstractIterator.foreach(Iterator.scala:1296)
scala.tools.nsc.Reporting$PerRunReporting.runFinished(Reporting.scala:85)
at sbt.internal.inc.MixedAnalyzingCompiler.$anonfun$compile$7(MixedAnalyzingCompiler.scala:192)
at scala.runtime.java8.JFunction0$mcV$sp.apply(JFunction0$mcV$sp.java:23)
at sbt.internal.inc.MixedAnalyzingCompiler.timed(MixedAnalyzingCompiler.scala:247)
at sbt.internal.inc.MixedAnalyzingCompiler.$anonfun$compile$4(MixedAnalyzingCompiler.scala:182)
at sbt.internal.inc.MixedAnalyzingCompiler.$anonfun$compile$4$adapted(MixedAnalyzingCompiler.scala:163)
at sbt.internal.inc.JarUtils$.withPreviousJar(JarUtils.scala:239)
at sbt.internal.inc.MixedAnalyzingCompiler.compileScala$1(MixedAnalyzingCompiler.scala:163)
at sbt.internal.inc.MixedAnalyzingCompiler.compile(MixedAnalyzingCompiler.scala:210)
at sbt.internal.inc.IncrementalCompilerImpl.$anonfun$compileInternal$1(IncrementalCompilerImpl.scala:528)
at sbt.internal.inc.IncrementalCompilerImpl.$anonfun$compileInternal$1$adapted(IncrementalCompilerImpl.scala:528)
at sbt.internal.inc.Incremental$.$anonfun$apply$5(Incremental.scala:175)
at sbt.internal.inc.Incremental$.$anonfun$apply$5$adapted(Incremental.scala:173)
at sbt.internal.inc.Incremental$$anon$2.run(Incremental.scala:459)
at sbt.internal.inc.IncrementalCommon$CycleState.next(IncrementalCommon.scala:116)
at sbt.internal.inc.IncrementalCommon$$anon$1.next(IncrementalCommon.scala:56)
at sbt.internal.inc.IncrementalCommon$$anon$1.next(IncrementalCommon.scala:52)
at sbt.internal.inc.IncrementalCommon.cycle(IncrementalCommon.scala:263)
at sbt.internal.inc.Incremental$.$anonfun$incrementalCompile$8(Incremental.scala:414)
at sbt.internal.inc.Incremental$.withClassfileManager(Incremental.scala:501)
at sbt.internal.inc.Incremental$.incrementalCompile(Incremental.scala:401)
at sbt.internal.inc.Incremental$.apply(Incremental.scala:167)
at sbt.internal.inc.IncrementalCompilerImpl.compileInternal(IncrementalCompilerImpl.scala:528)
at sbt.internal.inc.IncrementalCompilerImpl.$anonfun$compileIncrementally$1(IncrementalCompilerImpl.scala:482)
at sbt.internal.inc.IncrementalCompilerImpl.handleCompilationError(IncrementalCompilerImpl.scala:332)
at sbt.internal.inc.IncrementalCompilerImpl.compileIncrementally(IncrementalCompilerImpl.scala:420)
at sbt.internal.inc.IncrementalCompilerImpl.compile(IncrementalCompilerImpl.scala:137)
at sbt.Defaults$.compileIncrementalTaskImpl(Defaults.scala:2357)
at sbt.Defaults$.$anonfun$compileIncrementalTask$2(Defaults.scala:2314)
at sbt.internal.io.Retry$.apply(Retry.scala:46)
at sbt.internal.io.Retry$.apply(Retry.scala:28)
at sbt.internal.io.Retry$.apply(Retry.scala:23)
at sbt.internal.server.BspCompileTask$.compute(BspCompileTask.scala:31)
at sbt.Defaults$.$anonfun$compileIncrementalTask$1(Defaults.scala:2310)
at scala.Function1.$anonfun$compose$1(Function1.scala:49)
at sbt.internal.util.$tilde$greater.$anonfun$$u2219$1(TypeFunctions.scala:62)
at sbt.std.Transform$$anon$4.work(Transform.scala:68)
at sbt.Execute.$anonfun$submit$2(Execute.scala:282)
at sbt.internal.util.ErrorHandling$.wideConvert(ErrorHandling.scala:23)
at sbt.Execute.work(Execute.scala:291)
at sbt.Execute.$anonfun$submit$1(Execute.scala:282)
at sbt.ConcurrentRestrictions$$anon$4.$anonfun$submitValid$1(ConcurrentRestrictions.scala:265)
at sbt.CompletionService$$anon$2.call(CompletionService.scala:64)
at java.base/java.util.concurrent.FutureTask.run(FutureTask.java:264)
at java.base/java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:515)
at java.base/java.util.concurrent.FutureTask.run(FutureTask.java:264)
at java.base/java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1128)
at java.base/java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:628)
at java.base/java.lang.Thread.run(Thread.java:829)
Expectation
SBT compiles the code fine under Linux; you only get the following warning from the Scala compiler (which is expected for the code):
<macro>:1:15: early initializers are deprecated; they will be replaced by trait parameters in 3.0, see the migration guide on avoiding var/val in traits.
{ Test { new { val v = 1 } with AnyRef } }
^