Missing dependency results in compiler crash #16368
Comments
mushtaq
added
itype:bug
itype:crash
stat:needs triage
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Single file minimization using scala-cli (but still requiring external dependencies): //> using scala "3.2.1"
//> using lib "com.typesafe.akka::akka-http:10.5.0-M1"
// //> using lib "com.typesafe.akka::akka-stream:2.7.0"
val x = akka.http.scaladsl.model.HttpEntityUncommenting the second dependency makes the code compile |
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There was another instance of this problem observed in #16439 by @pmeheut. //> using scala "3.2.1"
//> using lib "dev.zio::zio-config:2.0.4"
//> using lib "dev.zio::zio-config-magnolia:2.0.4"
//> using lib "dev.zio::zio-config-typesafe:2.0.4"
//> using lib "com.softwaremill.sttp.client3::zio:3.8.3"
import zio.config.typesafe.*
import zio.config.magnolia.*
import zio.config.*, ConfigDescriptor.*, ConfigSource.*
object Foo {
case class Config(url: String)
def configDescription(args: Array[String]): ConfigDescriptor[Config] = {
val commandLineArgs = ConfigSource.fromCommandLineArgs(args.toList, keyDelimiter = Some('.'))
(descriptor[Config] from commandLineArgs)
}
} |
Kordyjan
added
prio:high
area:tasty-format
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I finally managed to run this without a wrapper using just the compiler. Here is what I get for the akka example in this case. "com.typesafe.akka::akka-http:10.5.0-M1" is on the classpath but "com.typesafe.akka::akka-stream:2.7.0" is not: The first two lines are debug output to System.err. The text after "Bad symbolic reference" is a regular error message that's printed, but a position is missing. The error message is output at phase erasure. I can't explain the different behavior when running under sbt or cli. |
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@odersky how do you run that exactly? Are you sure you also put the transitive dependencies of Using scala 3.2.1 and given that val x = akka.http.scaladsl.model.HttpEntityI run scalac -cp $(cs fetch --classpath com.typesafe.akka:akka-http_3:10.5.0-M1) i16368.scala |
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Thanks for the tip. I ran it without the transitive dependencies. I can also reproduce it now. |
Fixes #16368 (?) It would be good if somebody else would follow up here. I have just identified and avoided the immediate source of the crash, but I don't know what else could go wrong. In any case it's probably just a matter of surviving non-existing types.
Compiler version
3.2.1
Minimized code
Minimal reproduction in this repo.
sbt compileresults in compiler crash with just a single line in main (Java 17 on MacOS)Uncommenting the
akka-streamdependency inbuild.sbtprevents the crash.Note: adding
akka-streamdep is required because it is just a Provided dep inakka-httpOutput (click arrow to expand)
Click me
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