`Cannot find symbol` in IntelliJ 14

Question

I have use the IntelliJ Scala plugin before, in 13 and 13.1. I upgraded to 14, and it doesn't work anymore for my SBT project.

For all Scala standard lib stuff, I see errors like "Cannot find symbol scala.Option".

at scala project, compiler error - Cannot resolve symbol List? says I need to have the Scala facet for my module. I looked in facets, and Scala wasn't an option.

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I've uninstalled IntelliJ and the Scala plugin and my settings and the projects files multiple times, but still happens.

How do I fix this?

Not a solution, so not posting it as such; I've had better luck with Scala-IDE. IntelliJ wrote their own Scala parsing layer, and as such, frequently fails miserably any time macros are involved or other advanced type programming. Scala-IDE (for eclipse) uses the presentation compiler from the same compiler building your code. It can handle anything the compiler can handle, macros included. — Tim Harper, Nov 14 '14 at 01:29
@TimHarper, interesting. I used Eclipse and found that the Scala support was significantly worse, but that was years ago. I may give that a try. — Paul Draper, Nov 14 '14 at 01:32
I feel you @PaulDraper, I think IntelliJ Scala 1.1/1.1.1 is broken, 1.0 worked well for me (IDEA 14). Hopefully they'll fix it soon. — Dale Wijnand, Nov 16 '14 at 09:31

score 4 · Answer 1 · answered Nov 14 '14 at 05:16

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the new scala plugin for intellij 14 removed the facet and replaced it with Scala SDK library, see blog

for sbt project, I guess the best bet is to re-create your project by:

File -> open -> select the build.sbt of your project in popup -> delete existing project and import

answered Nov 14 '14 at 05:16

Septem

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I can't see that option, do you have a screenshot? – Henri Cook Jan 09 '15 at 16:27

score 1 · Answer 2 · answered Aug 12 '15 at 14:46

I had a similar issue when a Java module calls an Scala object. The issue was from the wrong setup in Source Folders; the Scala source was in src/main/scala/..., but in the Project Structure, the Source Folders were setup as src by default. When I changed it as src/main/scala, the Java module can find the Scala object correctly.

score 0 · Accepted Answer · answered Apr 19 '15 at 18:48

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I fixed this by using the nightly builds of the Scala plugin.

The fixes have now been incorporated into the stable versions.

answered Apr 19 '15 at 18:48

Paul Draper

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score 0 · Answer 4 · answered Jun 20 '16 at 19:54

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In my case i just had to reload the IDE...

answered Jun 20 '16 at 19:54

Raulucco

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`Cannot find symbol` in IntelliJ 14

4 Answers4