(Only with MSAN)

Output and generated repro script: https://gist.github.com/al13n321/768e2bda4d379b348d8d3d262d457786
Preprocessed source (13 MB): https://gist.github.com/al13n321/4dda8f37ab3193548f4fbad550b57162

Can also be reproduced like this:

• Clone https://github.com/ClickHouse/ClickHouse
• Check out this PR: Partially reimplement Parquet encoder to make it faster and parallelizable ClickHouse/ClickHouse#49367 (branch origin/enc, revision b3991710fba6626967d1c4fab71e4c9af62ba31e)
• mkdir build, cd build, cmake .., cd ..
• Run clang++ with this command line: https://gist.github.com/al13n321/eff14e9f48be86be693b0b8349c16709