util: convert traceback-related sysstrs to sysbytes in getstackframes...
util: convert traceback-related sysstrs to sysbytes in getstackframes
With this change, test-devel-warnings.t passes except for differences
in how ProgrammingError is formatted and one mysterious traceback
inside of transaction.__del__.
Differential Revision:
https://phab.mercurial-scm.org/D2212