Matched brace disappears in some cases

[ut2uz]

Try to put the cursor before last brace in the following simple example and move cursor forward:

void loop()
{
}

The upper brace disappears.

If one of matched braces is not in the same column, then OK:
void loop()
_ {
}

The same problem exists for any kind of matched brackets/braces

[sandeepmistry]

@ut2uz which version of the IDE and OS are you using?

With 1.6.7 on OS X 10.11 I get a white box on the first bracket. Is this what you are seeing?

[ut2uz]

@sandeepmistry , I think this problem exists since 1.6.5, the last is arduino-nightly 1.6.8. The OS is W10. Loop() looks like at your second picture.

[per1234]

It doesn't only happen when the braces are in the same column. Arduino IDE 1.6.8 2015/12/21 03:51 with Windows 7 64 bit:

[JulyJim]

I would be interested looking into this at the source code.
Since this would be my first attempt I have no clue how / where to find the source code.
Any help in just locating the source code would be sufficient for now.

[matthijskooijman]

@VaclavSal, I think that the matching of braces is taken care of by the RSyntaxTextArea library / component we use. It is built here: https://github.com/arduino/Arduino/blob/master/app/src/processing/app/Editor.java#L1034-L1070 and some related bits of code are here: https://github.com/arduino/Arduino/tree/master/app/src/processing/app/syntax

The rsyntaxtextarea source code itself can be found at https://github.com/bobbylight/RSyntaxTextArea though in Arduino we currently use a slightly modified version (source is here: https://github.com/arduino/RSyntaxTextArea). In the Arduino source tree, RSTA is included as a .jar file (compiled java code) here: https://github.com/arduino/Arduino/blob/master/app/lib/rsyntaxtextarea-2.5.8.1%2Barduino.jar

I hope this helps you find your way around, though it might be a bit tricky as your first introduction, because the code is split between two projects somewhat.

[JulyJim]

Thanks, I'll give it a try.

[nickgammon]

I also have this problem in Ubuntu, IDE version 1.6.7. See screenshot.

It is annoying to have the brace disappear in this way, particularly as it is the "important brace" in this case.

In my tests, if the opening brace is in a different column you can see it:

[JulyJim]

I hope I can use this as an supporting argument for early fix.
I use AutoFormat and if the leading brace is NOT in first column ( tested on loop ()) , AutoFormat will move it there.

I am sorry, too busy coding and not having time to get my feet wet in Java.

[per1234]

I can reproduce the issue in Arduino IDE 1.8.1. The issue does not occur in Arduino IDE 1.8.2 (or 1.8.3). This leads me to believe the issue was fixed by #6022.