Macro expansion error is breaking during pretty print

[mateor]

So, I don't have a good idea of the internals here yet. But I am experimenting with the Ammonite Repl 0.7.5 and really like it. But I hit a breakage.

My trace looks something like this:

@ val my_user = my.mongo.record("a_user").get
my_user: User <etc>
@ my_user.recordDetails.getCertainDetails
cmd12.sc:8: exception during macro expansion:
java.lang.AssertionError: assertion failed: mkAttributedQualifier(my.mongo.record, <none>)
    at scala.reflect.internal.TreeGen.mkAttributedQualifier(TreeGen.scala:86)
    at scala.reflect.internal.TreeGen.mkAttributedQualifier(TreeGen.scala:62)
    at scala.reflect.internal.TreeGen.mkAttributedRef(TreeGen.scala:122)
    at scala.reflect.internal.Internals$$anon$4.mkAttributedRef(Internals.scala:151)
    at scala.reflect.internal.Internals$$anon$4.mkAttributedRef(Internals.scala:148)
    at derive.Derive.deriveObject(Derive.scala:358)
    at derive.Derive$$anonfun$9.apply(Derive.scala:238)
    at derive.Derive$$anonfun$9.apply(Derive.scala:235)
    at scala.collection.TraversableLike$$anonfun$map$1.apply(TraversableLike.scala:234)
    at scala.collection.TraversableLike$$anonfun$map$1.apply(TraversableLike.scala:234)
    at scala.collection.immutable.Map$Map1.foreach(Map.scala:116)
    at scala.collection.TraversableLike$class.map(TraversableLike.scala:234)
    at scala.collection.AbstractTraversable.map(Traversable.scala:104)
    at derive.Derive.deriveType(Derive.scala:235)
    at derive.Derive.derive(Derive.scala:60)
    at pprint.Internals$LowerPriPPrint$.liftedTree1$1(PPrint.scala:408)
    at pprint.Internals$LowerPriPPrint$.FinalRepr(PPrint.scala:408)
    at sun.reflect.GeneratedMethodAccessor11.invoke(Unknown Source)
    at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
    at java.lang.reflect.Method.invoke(Method.java:498)
    at scala.reflect.macros.runtime.JavaReflectionRuntimes$JavaReflectionResolvers$$anonfun$resolveJavaReflectionRuntime$2.apply(JavaReflectionRuntimes.scala:34)
    at scala.reflect.macros.runtime.JavaReflectionRuntimes$JavaReflectionResolvers$$anonfun$resolveJavaReflectionRuntime$2.apply(JavaReflectionRuntimes.scala:22)
    at scala.tools.nsc.typechecker.Macros$class.macroExpandWithRuntime(Macros.scala:763)

            .print(res12, res12, "res12", _root_.scala.None)
                  ^
Compilation Failed

This only happens in a chained invocation, for instance the following works

@ my_user.recordDetails
res2: recordDetails = <details>
@ res2.getCertainDetails
res3: res2.getCertainDetails.type = Map(<etc>)

I saw some potentially related issues, but they are all marked solved. So I checked if it was a regression and at least com-lihaoyi/upickle#92 appears to be live again, or at least a possibly related error occurs.

(gist used since the trace is so long: https://gist.github.com/mateor/09cacda6b6ae39965b2a2e1b3e78e266)

[lihaoyi]

Should be fixed by 662859f

[lihaoyi]

http://www.lihaoyi.com/Ammonite/#0.9.0 is out