mirror of https://github.com/sbt/sbt.git
727f4b05c6
**Problem** When a val definition in build.sbt changes and the user runs `reload`, sbt crashes with `NoClassDefFoundError: $Wrap<hash>$`. ``` java.lang.NoClassDefFoundError: $Wrape8743d4f36$ at $Wrap0b8ea34d40$.$anonfun$1(build.sbt:1) ``` The workaround was to delete `project/target` directory. **Solution** The root cause was that imports were not included in the hash calculation when evaluating build.sbt expressions. When a val definition changes: 1. Its `$Wrap` module gets a new hash 2. Settings that reference the val get new imports pointing to the new module 3. But if the setting expression didn't change, its hash was the same 4. The old cached class was loaded with bytecode referencing the old module Fix: Include imports in the hash calculation in `Eval.evalCommon`. Also re-enable `cleanEvalClasses` in `Load.scala` which was disabled pending this fix. |
||
|---|---|---|
| .github | ||
| buildfile/src | ||
| client | ||
| contributing-docs | ||
| core-macros/src | ||
| internal | ||
| launch | ||
| launcher-package | ||
| licenses | ||
| lm-core | ||
| lm-coursier | ||
| lm-ivy/src | ||
| main | ||
| main-actions/src | ||
| main-command/src | ||
| main-settings/src | ||
| notes | ||
| project | ||
| protocol/src/main | ||
| run | ||
| sbt-app/src | ||
| sbt-remote-cache/src/main/scala/sbt | ||
| scripted-sbt | ||
| scripts | ||
| server-test/src | ||
| src/main/conscript | ||
| tasks | ||
| tasks-standard | ||
| testing | ||
| util-cache | ||
| util-collection | ||
| util-tracking | ||
| worker/src | ||
| zinc-lm-integration/src | ||
| .git-blame-ignore-revs | ||
| .gitattributes | ||
| .gitignore | ||
| .gitmodules | ||
| .jvmopts | ||
| .mailmap | ||
| .sbtopts | ||
| .scala-steward.conf | ||
| .scalafmt.conf | ||
| AGENTS.md | ||
| CONTRIBUTING.md | ||
| LICENSE | ||
| NOTICE | ||
| PROFILING.md | ||
| README.md | ||
| SUPPORT.md | ||
| build.sbt | ||
| reset.sh | ||
| sbt | ||
| sbt-allsources.sh | ||
| sbt.sh | ||
| server.md | ||
README.md
sbt
sbt is a build tool for Scala, Java, and more.
For general documentation, see https://www.scala-sbt.org/.
sbt 2.x
This is the 2.x series of sbt. The source code of sbt is split across several GitHub repositories, including this one.
- sbt/io hosts
sbt.iomodule. - sbt/zinc hosts Zinc, an incremental compiler for Scala.
- sbt/sbt, this repository hosts modules that implement the build tool.
Other links
- Setup: Describes getting started with the latest binary release.
- FAQ: Explains how to get help and more.
- sbt/sbt-zero-seven: hosts sbt 0.7.7 and earlier versions
Issues and Pull Requests
Please read CONTRIBUTING carefully before opening a GitHub Issue, and Contributor's guide before opening a pull request.
If you're looking for an idea for a contribution, issues labeled with good first issue or help wanted might be good starting points.
If you would like to ask questions about sbt, there's sbt channel on Scala Discord, but it would be good to gather questions on Stackoverflow.
license
See LICENSE.