dependencyUpdates reports available updates (incorrectly?) but whatDependsOn lists nothing depending on earlier version

[philwalk]

I love this plugin, BTW!

I'm seeing a problem where, although I reference the latest version of the following dependency, it still reports that I am able to update it. Specifically, I have this in my build:

libraryDependencies += "org.scalameta" %% "scalameta" % "2.1.3"

Below is a session where (if I understand how things are supposed to work) it tells me that I have no dependencies on version 2.1.2 (as I would expect). So why does it suggest that I'm able to upgrade, when, AFAIKT, I have no transitive dependencies on the earlier version?

Thanks in advance, and let me know if you need other info. Regards, Phil

sbt:ue> dependencyUpdates
[info] Found 1 dependency update for ue
[info]   org.scalameta:semanticdb-scalac:plugin->default(compile) : 2.1.2 -> 2.1.3
[info] Found 1 dependency update for vastblue
[info]   org.scalameta:semanticdb-scalac:plugin->default(compile) : 2.1.2 -> 2.1.3
[info] Found 1 dependency update for apps
[info]   org.scalameta:semanticdb-scalac:plugin->default(compile) : 2.1.2 -> 2.1.3
[success] Total time: 8 s, completed Dec 9, 2017 10:26:24 PM

sbt:ue> ;reload ;whatDependsOn org.scalameta semanticdb-scalac_2.12 2.1.2
[info] Loading settings from plugins.sbt ...
[info] Loading global plugins from /home/philwalk/.sbt/1.0/plugins/project
[info] Loading global plugins from /home/philwalk/.sbt/1.0/plugins
[info] Loading project definition from /opt/ue/project/project
[info] Loading settings from build.sbt,buildinfo.sbt,play-fork-run.sbt,plugins.sbt,sbt-ui.sbt ...
[info] Loading project definition from /opt/ue/project
[info] Loading settings from build.sbt ...
[info] Set current project to ue (in build file:/opt/ue/)
[info] Updating {file:/opt/ue/}vastblue...
[info] Done updating.
[success] Total time: 17 s, completed Dec 9, 2017 10:26:51 PM

A bit of additional info that might be irrelevant, here are some eviction warnings for subprojects "vastblue" and "apps" that reference "org.scalameta":

[warn] Found version conflict(s) in library dependencies; some are suspected to be binary incompatible:
[warn]  * com.lihaoyi:fastparse_2.12:1.0.0 is selected over {0.4.4, 0.4.3}
[warn]      +- com.lihaoyi:scalaparse_2.12:1.0.0                  (depends on 1.0.0)
[warn]      +- vastblue:vastblue_2.12:0.1-SNAPSHOT                (depends on 1.0.0)
[warn]      +- org.scalameta:tokenizers_2.12:2.1.3                (depends on 0.4.4)
[info]  * com.lihaoyi:sourcecode_2.12:0.1.4 is selected over 0.1.3
[info]      +- com.lihaoyi:fastparse-utils_2.12:1.0.0             (depends on 0.1.4)
[info]      +- com.lihaoyi:scalaparse_2.12:1.0.0                  (depends on 0.1.4)
[info]      +- com.lihaoyi:fastparse_2.12:1.0.0                   (depends on 0.1.4)
[info]      +- org.scalameta:common_2.12:2.1.3                    (depends on 0.1.3)
[warn]  * com.lihaoyi:fastparse_2.12:1.0.0 is selected over {0.4.4, 0.4.3}
[warn]      +- apps:apps_2.12:0.1-SNAPSHOT                        (depends on 1.0.0)
[warn]      +- com.lihaoyi:scalaparse_2.12:1.0.0                  (depends on 1.0.0)
[warn]      +- vastblue:vastblue_2.12:0.1-SNAPSHOT                (depends on 1.0.0)
[warn]      +- org.scalameta:tokenizers_2.12:2.1.3                (depends on 0.4.4)
[warn]      +- com.trueaccord.scalapb:scalapb-runtime_2.12:0.6.2  (depends on 0.4.4)
[info] Here are other depedency conflicts that were resolved:
[info]  * com.lihaoyi:sourcecode_2.12:0.1.4 is selected over 0.1.3
[info]      +- com.lihaoyi:fastparse-utils_2.12:1.0.0             (depends on 0.1.4)
[info]      +- com.lihaoyi:scalaparse_2.12:1.0.0                  (depends on 0.1.4)
[info]      +- com.lihaoyi:fastparse_2.12:1.0.0                   (depends on 0.1.4)
[info]      +- org.scalameta:common_2.12:2.1.3                    (depends on 0.1.3)

[jrudolph]

dependencyUpdates lists this update for the plugin scope which sbt-dependency-graph currently doesn't support.

[philwalk]

I haven't seen this error message recently, so maybe we can close this.