FENNEL:  fix Backtrace for Windows build
FENNEL:  fix Backtrace for Windows build

[git-p4: depot-paths = "//open/lu/dev/": change = 4946]

LucidDB/luciddb,LucidDB/luciddb,LucidDB/luciddb,LucidDB/luciddb,LucidDB/luciddb,LucidDB/luciddb,LucidDB/luciddb,LucidDB/luciddb,LucidDB/luciddb