[SPARK-1927] Implicits declared in companion objects not found in Spark shell

• Type: Bug
• Status: Resolved
• Priority: Major
• Resolution: Duplicate
• Affects Version/s: 0.9.0
• Component/s: Spark Shell

Environment

Ubuntu Linux 14.04, Oracle Java 7u55

• Assignee: Unassigned
• Reporter: Piotr Kolaczkowski
• Created: 26/May/14 11:40
• Updated: 08/Jan/16 12:08
• Resolved: 08/Jan/16 12:08

Description

scala> :paste
// Entering paste mode (ctrl-D to finish)

trait Mapper[T]
class Foo
object Foo { implicit object FooMapper extends Mapper[Foo] }

// Exiting paste mode, now interpreting.

defined trait Mapper
defined class Foo
defined module Foo

scala> implicitly[Mapper[Foo]]
<console>:28: error: could not find implicit value for parameter e: Mapper[Foo]
              implicitly[Mapper[Foo]]
                        ^

Exactly same example in the official Scala REPL (2.10.4):

scala> :paste
// Entering paste mode (ctrl-D to finish)

trait Mapper[T]
class Foo
object Foo { implicit object FooMapper extends Mapper[Foo] }

// Exiting paste mode, now interpreting.

defined trait Mapper
defined class Foo
defined module Foo

scala> implicitly[Mapper[Foo]]
res0: Mapper[Foo] = Foo$FooMapper$@4a20e9c6

I guess it might be another manifestation of the problem of everything being an inner object in Spark Repl.

Issue Links

• duplicates: SPARK-5150 Strange implicit resolution behavior in Spark REPL
• relates to: SPARK-5150 Strange implicit resolution behavior in Spark REPL