I just noticed this an hour or so ago. I rebooted my machine, reindexed CLion project files. Still 'crazy'.
The first indication was when I tried a global search for a variable, and it got ZERO hits, even though I had started the search by highlighting the symbol I wanted to search for. It was simple camel-case text. After clicking/unclicking search options, scope, retrying, etc. I discovered that if I unchecked "Regex" in the search options it would find the text just fine. There are NO regex characters in the string I was searching for, and in the past Regex searches produces exactly the same results as a non-regex search for simple text like this.
Later, I was aligning comments on a new section of code, and CLion is tabbing to different columns on adjacent lines, for example, on one line I tab from column 46 and it inserts three spaces, taking me to column 49. On the next line, if I tab from column 46 it inserts four spaces, taking me to column 50. If I go up two lines and press tab from column 46, it inserts two spaces, taking me to column 48. I am using the same fixed-spacing font I always have.
I'd worry about a hardware issue, but every other application I'm running works fine; and typically hardware issues cause hard crashes rather than odd behavior like this.
Has anyone else seen strange behavior like this? I'm at a loss as to how to proceed. I am utterly dependent on CLion to do my work. I think while I wait for a response I will look into going back to an earlier version of CLion to see if things improve.
Build #CL-181.5087.36, built on May 23, 2018
JRE: 1.8.0_152-release-1136-b39 amd64
JVM: OpenJDK 64-Bit Server VM by JetBrains s.r.o