One of the installers we have recently seems to be patching to a wrong build number. There is no sign that any feature was not advertised properly and all the actions seem to return value of either 0 or 1 and there is no error message.
Here is how the behaviour:
Base version: 1.2.5 (already installed)
Patch version to be applied: 1.2.10
Actual patched version (that is not installed previously): 1.2.7.
What should I look for to debug within the verbose logging?