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transient var in trait compiles but does not generate #10147

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scabug opened this issue Jan 13, 2017 · 3 comments
Closed

transient var in trait compiles but does not generate #10147

scabug opened this issue Jan 13, 2017 · 3 comments

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@scabug
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scabug commented Jan 13, 2017

Adding @transient to the start of line on code highlighted here results in a .class that generates the following output from javap:

BTopping-MPro:akka-http btopping$ javap akka-http-core/target/scala-2.11/classes/akka/http/scaladsl/model/HttpMethods$.class
Compiled from "HttpMethod.scala"
public final class akka.http.scaladsl.model.HttpMethods$ implements akka.http.impl.util.ObjectRegistry<java.lang.String, akka.http.scaladsl.model.HttpMethod> {
  public static final akka.http.scaladsl.model.HttpMethods$ MODULE$;
  public static {};
  *public scala.collection.immutable.Map akka$http$impl$util$ObjectRegistry$$_registry();*
  public void akka$http$impl$util$ObjectRegistry$$_registry_$eq(scala.collection.immutable.Map);
  public final java.lang.Object register(java.lang.Object, java.lang.Object);
  public scala.Option getForKey(java.lang.Object);
  public scala.Option<akka.http.scaladsl.model.HttpMethod> getForKeyCaseInsensitive(java.lang.String, scala.Predef$$less$colon$less<java.lang.String, java.lang.String>);
  public akka.http.scaladsl.model.HttpMethod CONNECT();
  public akka.http.scaladsl.model.HttpMethod DELETE();
  public akka.http.scaladsl.model.HttpMethod GET();
  public akka.http.scaladsl.model.HttpMethod HEAD();
  public akka.http.scaladsl.model.HttpMethod OPTIONS();
  public akka.http.scaladsl.model.HttpMethod PATCH();
  public akka.http.scaladsl.model.HttpMethod POST();
  public akka.http.scaladsl.model.HttpMethod PUT();
  public akka.http.scaladsl.model.HttpMethod TRACE();
}

The line in bold should have the transient modifier.

Please let me know if there's anything I can provide!
@scabug
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scabug commented Jan 13, 2017

Imported From: https://issues.scala-lang.org/browse/SI-10147?orig=1
Reporter: Brian Topping (briantopping)
Affected Versions: 2.11.8

@scabug
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scabug commented Jan 13, 2017

@adriaanm said:
This is not a bug. The transient field is there, but you need to use javap -p to see it:

trait ObjectRegistry { @transient private[this] var _registry = "hi!" } 
class OR extends ObjectRegistry
$  javap -p OR
public class OR implements ObjectRegistry {
  private transient java.lang.String ObjectRegistry$$_registry;
  public java.lang.String ObjectRegistry$$_registry();
  public void ObjectRegistry$$_registry_$eq(java.lang.String);
  public OR();
}

@scabug scabug closed this as completed Jan 13, 2017
@scabug
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scabug commented Jan 13, 2017

Brian Topping (briantopping) said:
Indeed, thanks!

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