perl5matcher stackoverflow

Forum 2005-2010 (read only) Software Bugs & Suggestions
1

This is really odd. I'm getting a stackoverflow error when uploading my sketch:

java.lang.StackOverflowError
at java.util.Vector.addElement(Unknown Source)
at java.util.Stack.push(Unknown Source)
at com.oroinc.text.regex.Perl5Matcher._pushState(Perl5Matcher.java)

My sketch has the following:

void sendFrame(bool data, const char *charPtr, bool nullTerm) {
if (nullTerm) {
// special handling for commands that end with null terminator. the write command will not write the term char so we must write it explicitely

But when I change remove " we must write it explicitely" from the end of the comment, it works

This is Arduino 17 on windows.

Andrew

2

that is odd, ive written comments longer than that in 17 with no issues (sofar) (windows)

sorry but no help from me :frowning:

3

btw, the same sketch uploads fine with 17 on mac

4

The problem was:

char x = '"';

should be

char x = '"';

This is a bug in the Arduino IDE since that is a legal assignment. What's weird is that the program worked up until it got to a certain size. In this case my comment triggered some condition.

5

Since comments are ignored by the compiler, it's difficult to believe that they are the cause of the problem.

The assignment of " (an escaped double quote) may be a legal assignment, but what value is actually placed in x?

It's likely that the invalid value in x was causing problems that didn't show up until x got put in a memory location that some code is overwriting, due to writing out-of-bounds, or mis-reading (again due to an out-of-bounds situation).

6

But the error was not occurring in the compiler -- it never even got to compilation. It was occurring in the IDE (java).

7

This is really odd. I'm getting a stackoverflow error when uploading my sketch:

If you never got to the compiler, what were you uploading?

8

To clarify, the error occurred when I hit the "upload" button, not when it was uploading, because it never got that far. That stacktrace indicates a java error in the IDE. Possibly in the oroinc library. Again, it didn't get to the compilation step.

As I modified the program, it got to a point where I could prevent the error if I removed an arbitrary chunk of code, but unfortunately I needed that code.

Here's another instance of the same problem http://www.arduino.cc/cgi-bin/yabb2/YaBB.pl?num=1234031376

9

Sorry about that. The IDE includes some relatively hacky code to preprocess your source code to add function prototypes. It's just a bunch of regular expressions that can get confused by certain unusual strings in your code (including within comments).

I added a note about this to troubleshooting guide: http://arduino.cc/en/Guide/Troubleshooting#stackoverflow

10

thanks

11

This problem nearly drove me crazy. Finally I discovered a debugging line:

Serial.println(" no registration file);

Adding the " at the end of the string fixed it fine.

I dimly remember sticking the line in about (probably exactly before) the time everything turned to worms