Eremey Valetov
79e0505fc3
Windows MSVC test_delta failed with STATUS_HEAP_CORRUPTION (0xc0000374). ASan/UBSan on Linux finds nothing; the most likely Windows-specific issue is malloc(0) in uc2_delta_apply when the target is empty (test_empty_target). Bump to malloc(1) to get a canonical free()-safe pointer. Add fflush(stdout) between tests so the next CI run shows which test (if any) still fails on Windows.