Update CONTRIBUTING.md

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@ -23,6 +23,24 @@ Bug reports must have enough detail to understand and reproduce the problem.
Bug reports without an associated pull request will generally be closed. Bug reports without an associated pull request will generally be closed.
However, bug reports with a pull request are likely to be merged promptly. However, bug reports with a pull request are likely to be merged promptly.
## FAQ
Please search previous issues for an answer before opening a pull request. A few common ones
are listed here.
### I get a compilation error.
While you can check the build status at [Travis](https://travis-ci.org/zxing/zxing) to confirm,
the project correctly builds and passes tests at all times.
90% of the time it's due to using an old version of Java. Version 3.4+ require Java 8.
Use earlier versions with Java 7 and earlier.
### This barcode doesn't decode.
Not all images will decode. All else equal, more is better, but this is not accepted as a bug
report. A pull request that makes changes to make the barcode decode without decreasing the net
number of barcodes recognized in the unit tests may be considered.
## Licensing ## Licensing
Contributions via GitHub pull requests are gladly accepted from their original author. Contributions via GitHub pull requests are gladly accepted from their original author.