https://www.infoworld.com/d/open-source-software/report-open-source-tops-proprietary-code-in-quality-187169"In its 2011 Coverity Scan Open Source Integrity Report, which was
released on Thursday, Coverity actually found that open source code
has fewer defects per thousand lines of code than proprietary software
code does.
"The line between open source and proprietary software will continue
to blur over time as open source is further cemented in the modern
software supply chain," noted Zack Samocha, Coverity's project
director for the Scan project."
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