Throws org.scalameta.invariants.InvariantFailedException

[attilapiros]

First thanks for your contribution to open source :)

Unfortunately I cannot use it yet I have tried to generate the tags on the Apache Spark source and got the following error:

$ stags ./
Exception in thread "main" org.scalameta.invariants.InvariantFailedException: invariant failed:
when verifying ScalametaTokenizer.this.input.chars.apply(curr.endOffset.+(1)).==('\"')
found that ScalametaTokenizer.this.input.chars.apply(curr.endOffset.+(1)) is not equal to '\"'
where ScalametaTokenizer = scala.meta.internal.tokenizers.ScalametaTokenizer@5143c662
	at org.scalameta.invariants.InvariantFailedException$.raise(Exceptions.scala:15)
	at scala.meta.internal.tokenizers.ScalametaTokenizer.emitContents$1(ScalametaTokenizer.scala:222)
	at scala.meta.internal.tokenizers.ScalametaTokenizer.loop$1(ScalametaTokenizer.scala:231)
	at scala.meta.internal.tokenizers.ScalametaTokenizer.uncachedTokenize(ScalametaTokenizer.scala:276)
	at scala.meta.internal.tokenizers.ScalametaTokenizer.tokenize(ScalametaTokenizer.scala:31)
	at scala.meta.internal.tokenizers.ScalametaTokenizer$$anon$2.apply(ScalametaTokenizer.scala:287)
	at scala.meta.tokenizers.Api$XtensionTokenizeDialectInput.tokenize(Api.scala:21)
	at scala.meta.tokenizers.Api$XtensionTokenizeInputLike.tokenize(Api.scala:10)
	at scala.meta.internal.parsers.ScalametaParser.scannerTokens$lzycompute(ScalametaParser.scala:183)
	at scala.meta.internal.parsers.ScalametaParser.scannerTokens(ScalametaParser.scala:183)
	at scala.meta.internal.parsers.ScalametaParser.<init>(ScalametaParser.scala:140)
	at scala.meta.internal.parsers.ScalametaParser$$anon$189.apply(ScalametaParser.scala:3465)
	at scala.meta.parsers.Api$XtensionParseDialectInput.parse(Api.scala:21)
	at scala.meta.parsers.Api$XtensionParseInputLike.parse(Api.scala:10)
	at co.pjrt.stags.TagGenerator$.generateTagsForFile(TagGenerator.scala:15)
	at co.pjrt.stags.cli.Cli$.$anonfun$run$3(Cli.scala:33)
	at scala.collection.TraversableLike.$anonfun$flatMap$1(TraversableLike.scala:241)
	at scala.collection.immutable.List.foreach(List.scala:389)
	at scala.collection.TraversableLike.flatMap(TraversableLike.scala:241)
	at scala.collection.TraversableLike.flatMap$(TraversableLike.scala:238)
	at scala.collection.immutable.List.flatMap(List.scala:352)
	at co.pjrt.stags.cli.Cli$.run(Cli.scala:30)
	at co.pjrt.stags.cli.Cli$.run_(Cli.scala:14)
	at co.pjrt.stags.cli.Main$.$anonfun$mainWithCwd$2(Main.scala:24)
	at co.pjrt.stags.cli.Main$.$anonfun$mainWithCwd$2$adapted(Main.scala:24)
	at scala.Option.fold(Option.scala:158)
	at co.pjrt.stags.cli.Main$.mainWithCwd(Main.scala:24)
	at co.pjrt.stags.cli.Main$.main(Main.scala:18)
	at co.pjrt.stags.cli.Main.main(Main.scala)
	at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
	at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
	at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
	at java.lang.reflect.Method.invoke(Method.java:498)
	at coursier.Bootstrap.main(Bootstrap.java:430)

[attilapiros]

scalameta/scalameta#1177

[pjrt]

Thanks for the report. I'll keep an eye on the Scalameta PR. Though there is an issue here in that Stags probably shouldn't fail completely if a single file failed to parse.

[olafurpg]

A fix for this has been merged in scalameta scalameta/scalameta#1685 thanks to a PR from @hugo-vrijswijk

[pjrt]

Awesome, thanks! Once the new version is released we can just upgrade.

[pjrt]

@attilapiros I've pushed 0.4.2 to sonatype (will be in maven in a bit). That patch does not fix the issue you described but it does allow stags to keep working and just ignore that file. Tested against spark HEAD.

Once the next stable version of scalameta comes out (with the actual fix) we can upgrade.