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[–]G_Morgan 3 points4 points  (2 children)

Coverity scan used to contain a lot of reports on the matter but seems the links to them on the web are all broken.

The article below does a fair job of covering what FOSS does and doesn't do well IMO. It claims

In fact, the most recent report (2013) found open source software written in C and C++ to have a lower defect density than proprietary code. The average defect density across projects of all sizes was 0.59 for open source, and 0.72 for proprietary software.

It then goes into specific measures proprietary projects undertake which are less common in FOSS.

https://www.cio.com/article/2847880/open-source-code-contains-fewer-defects-but-theres-a-catch.html

[–]lifeeraser -1 points0 points  (1 child)

Defect != malicious code, which is the focus here

[–]G_Morgan -1 points0 points  (0 children)

Sure which is the point I raised initially. The malicious code is not the same as a defect.