When multiple QPs are checked at encoder, palette predictor is not correctly initialized inside the loop over QPs. Attached patch relative to SCM-5.2 may solve the problem.

If palette predictor contains repeated entries, encoder may crash while calculation reused and new entries, since the number of reused entries may exceed the palette size, and "uiNumPLTRceived--" can be negative, however it has unsigned type. Attached patch relative to SCM-5.2 may solve the problem.

In predInterSearch, there can be a case when AMVP is not used and merge mode is not tried when all candidates are IntraBC. This will lead to an encoder crash at MC since reference indices are equal to -1. Attached patch may solve the problem.