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type mismatch on dependent method with default arguments #9333

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scabug opened this issue May 27, 2015 · 4 comments
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type mismatch on dependent method with default arguments #9333

scabug opened this issue May 27, 2015 · 4 comments
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duplicate should compile typer

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@scabug
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scabug commented May 27, 2015 

class A{case class B()}
def f(a: A)(b : a.B, c: Int = 0) = 0
val a = new A
f(a)(a.B())

results in

<console>:15: error: type mismatch;
 found   : a.B
 required: x$1.B
Error occurred in an application involving default arguments.
              f(a)(a.B())

Removing the default parameter, or moving it to the first parameter list makes the problem disappear.
@scabug
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scabug commented May 27, 2015

Imported From: https://issues.scala-lang.org/browse/SI-9333?orig=1
Reporter: Patrick Premont (ppremont)
Affected Versions: 2.11.6
See #7234, #7371

@scabug
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scabug commented May 28, 2015

@retronym said:
Duplicate of #7371 and/or #7234.

@scabug scabug closed this as completed May 28, 2015
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scabug commented May 28, 2015

Patrick Premont (ppremont) said:
Sorry about the duplicate. I had only searched for "type mismatch" errors.

@som-snytt
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specifically #7234 which is not fixed

Looking at the two tickets side-by-side is like the old children's puzzle, spot the difference!

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