The output of the doc task is cached only after second run

[2m]

• I've read the CONTRIBUTING guidelines

steps

Make a project with one Scala source file and an empty build definition:

File: project/build.properties

sbt.version=1.2.4

File: File: src/main/scala/Main.scala

object Main {}

Run the following commands:

─╼ sbt -no-global                                                                         sbt:simple> clean
[success] Total time: 0 s, completed Oct 6, 2018 2:48:53 PM
sbt:simple> doc
[info] Updating ...
[info] Done updating.
[info] Main Scala API documentation to /home/martynas/projects/sbt-sandbox/simple/target/scala-2.12/api...
model contains 2 documentable templates
[info] Main Scala API documentation successful.
[success] Total time: 1 s, completed Oct 6, 2018 2:48:55 PM
sbt:simple> doc
[info] Main Scala API documentation to /home/martynas/projects/sbt-sandbox/simple/target/scala-2.12/api...
model contains 2 documentable templates
[info] Main Scala API documentation successful.
[success] Total time: 0 s, completed Oct 6, 2018 2:48:56 PM
sbt:simple> doc
[success] Total time: 0 s, completed Oct 6, 2018 2:48:57 PM

problem

The result of the doc task was cached after the second run.

expectation

The result of the doc task is cached after the first run.

notes

sbt version: 1.2.4, 1.2.0, 1.1.0, 1.0.0
The last sbt version that expectation holds was 0.13.17.

[eed3si9n]

Thanks for the report. Sounds like we have a caching bug.