REPL: Compilatation failed "Main.scala:11: Internal is renamed twice"

[Flowdalic]

I'm trying to add a REPL to my Java projects build with gradle (same as #237). At first I was using the Scala REPL which worked but didn't had tab completion support. Now I was pointed to Ammonite, which I configured.

At first I was very happy, because tab completion now works, but unfortunately, when trying to invoke a method, the compilation fails:

MiniDNS REPL
Welcome to the Ammonite Repl 0.5.5
(Scala 2.11.7 Java 1.8.0_72)
@ c.q 
query

def query(x$1: String,x$2: de.measite.minidns.Record.TYPE,x$3: de.measite.minidns.Record.CLASS,x$4: java.net.InetAddress): de.measite.minidns.DNSMessage
def query(x$1: String,x$2: de.measite.minidns.Record.TYPE,x$3: de.measite.minidns.Record.CLASS,x$4: java.net.InetAddress,x$5: Int): de.measite.minidns.DNSMessage
def query(x$1: de.measite.minidns.Question): de.measite.minidns.DNSMessage
def query(x$1: de.measite.minidns.Question,x$2: String): de.measite.minidns.DNSMessage
def query(x$1: de.measite.minidns.Question,x$2: java.net.InetAddress): de.measite.minidns.DNSMessage
def query(x$1: de.measite.minidns.Question,x$2: java.net.InetAddress,x$3: Int): de.measite.minidns.DNSMessage
final def query(x$1: String,x$2: de.measite.minidns.Record.TYPE): de.measite.minidns.DNSMessage
final def query(x$1: String,x$2: de.measite.minidns.Record.TYPE,x$3: de.measite.minidns.Record.CLASS): de.measite.minidns.DNSMessage
@ c.query("foo.bar.com", TYPE.A) 
Main.scala:11: Internal is renamed twice
import ammonite.repl.frontend.ReplBridge.repl.{
       ^
Compilation Failed
@  

[lihaoyi]

@Flowdalic can you provide standalone repro steps I can use? I haven no idea what gradle is or what miniDNS is, but this looks like it should be fixable

[Flowdalic]

See mentioned commit. Steps to reproduce

git clone https://github.com/Flowdalic/minidns.git
cd minidns
git checkout -b repl
./repl

[lihaoyi]

I'm getting

haoyi-mbp:minidns haoyi$ git checkout -b repl
Switched to a new branch 'repl'
haoyi-mbp:minidns haoyi$ ./repl
Compiling and computing classpath (May take a while)
./repl: line 15: gradle: command not found
Classpath computed, starting REPL
Error: Could not find or load main class scala.tools.nsc.MainGenericRunner
haoyi-mbp:minidns haoyi$ brew install gradle
==> Downloading https://downloads.gradle.org/distributions/gradle-2.3-bin.zip
######################################################################## 100.0%
🍺  /usr/local/Cellar/gradle/2.3: 154 files, 45M, built in 5 seconds
haoyi-mbp:minidns haoyi$ ./repl
Compiling and computing classpath (May take a while)

FAILURE: Build failed with an exception.

* Where:
Build file '/Users/haoyi/Dropbox (Personal)/Workspace/minidns/build.gradle' line: 198

* What went wrong:
A problem occurred evaluating root project 'MiniDNS'.
> ANDROID_HOME environment variable is not set

* Try:
Run with --stacktrace option to get the stack trace. Run with --info or --debug option to get more log output.
Classpath computed, starting REPL
Error: Could not find or load main class scala.tools.nsc.MainGenericRunner

Do I need an Android SDK set up to make this fail?

[lihaoyi]

Could you throw together a repro that doesn't require android? Ideally I'd want something I can run on OpenJDK. I don't see anything about this failure which would be specific to Android

[PanAeon]

The problem is that when someone imports 'repl' object everything fails:
import de.measite.minidns.repl
Steps to reproduce:
object repl

[lihaoyi]

Yeah but i have no clue what the repl object is, and this bug shouldn't have that much to do with your code. Unfortunately, I'm not that familiar with your code or setup to know what's important or not. But if one of you could minimize this (i.e. just start a branch and delete all the trash that's irrelevant) that would help me a lot in fixing this

[PanAeon]

No-no, just create object repl in ammonite, and then it throws compilation error.

[lihaoyi]

Oh that's a good find

haoyi-mbp:~ haoyi$ ~/amm
Loading...
Welcome to the Ammonite Repl 0.5.5
(Scala 2.11.7 Java 1.8.0_25)
haoyi-haoyi@ 1
res0: Int = 1
haoyi-haoyi@ object repl
defined object repl
haoyi-haoyi@ 1
Main.scala:11: Internal is renamed twice
import ammonite.repl.frontend.ReplBridge.repl.{
       ^
Compilation Failed

[lihaoyi]

@PanAeon as a workaround could you import your repl as something else, e.g. minidnsrepl or something?

[PanAeon]

Well, it's not mine) It's Flowdalic's)

[Flowdalic]

s/de.measite.minidns.repl/de.measite.minidns.minidnsrepl/ fixed the issue for me (not sure if you want/can fix it in Ammonite). Thank you. :)

[lihaoyi]

Here's a tighter minimization of the issue:

@ object Foo{
    val bar = 1
  }
defined object Foo
@ import Foo.bar
import Foo.bar
@ import Foo.{bar => _}
import Foo.{bar => _}
@ bar
Main.scala:41: bar is renamed twice
import cmd0.Foo.{
       ^
Compilation Failed