Using Eclipse 2018-12 and DevStyle 1.11.0.201909132202, when printing lines longer than 4680 characters to the Console (via standard error or standard out), the text becomes invisible. It can be selected and copied, but it can not be seen in the Console view. However, if I set the “Fixed width console” setting to 1000, it displays in the console (wrapped across 4 lines). Also, if I just disable DevStyle and restart Eclipse, the output displays, on one line, as expected (“Fixed width console” turned back off).
Regarding the DevStyle version, it was happening in my previous version as well (not sure which version I was on prior to my upgrade today). So, it is not isolated to just 1.11.0.201909132202.