v2.50.1.vfs.0.2

What's Changed

• [2.50.1] midx-write: fix segfault and other cleanups by @derrickstolee in #790
• vfs-2.50.1: codeql: run static analysis as part of CI builds by @dscho in #786

Full Changelog: v2.50.1.vfs.0.1...v2.50.1.vfs.0.2