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Within the function the pointer top is not changed when the pointed node contains an even value. And the data member next of the previous node before the deleted node also is not changed.

The function can be defined the following way.

Really, you should edit your question and provide the exact errors but I've decided to do some of the legwork for you since you're probably pretty new to this.

So first thing I did was compile your code here with -Wall and look what I get:

You could use a counter to keep track of the number of special values in a row:

The problem turned out to be due to a bug the keras_to_tensorflow I used for conversion. I reported the issue here. The bug is still there in keras_to_tensorflow

On line 68:

A few thoughts:

• You could ask on the flink-user mailing list -- in general, operational questions like this are more likely to elicit knowledgeable responses on the mailing list than on stack overflow.

• I've heard that if RocksDB is given more off-heap memory to work with, it can help because RocksDB will use it for caching. Sorry, but I don't know how any details of how to go about configuring this.

• Perhaps increasing the parallelism would help.

• If it's possible to do so, it might be interesting to try running with the heap-based state backend instead, just to see how much of the pain is caused by RocksDB.

Maybe you can use ptrace. Attach to all your threads (except for the thread that prints the stacktrace), and you can get register values with PTRACE_GETREGS. Then you can do stack unwinding (maybe you will need information stored in the .elf file to do this reliably). Note, that you have to take special care, if a thread is just creating/destroying its stack frame. And you may need debug information from the elf to do this reliably (you'd surely need that if your code compiled with omitted frame pointers).

Not an easy task to do this by hand, but surely can be done.

There are two mistakes in your code. The first one is, you need to return in dequeue,

Sigh, ran out of space in the comments again....

It would help to put the file somewhere, rather than pasting it. PDF files are binary and length calculations depend on things like CR/LF pairs, meaning that each /Length could potentially be incorrect and its not possible to tell from looking at the pasted file.

Similarly the xref table offsets could be incorrect. In fact the offset for entry 1 looks incorrect, even assuming LF EOLs, but its not possible to be certain from the pasted file.

Note the error message is from Ghostscript (which IM uses to deal with PDF files). You would probably get more information if you just fed the PDF file to Ghostscript in the first place. You could also try setting -DPDFDEBUG and -dPDFSTOPONERROR, the combination will print out which object GS is dealing with and what it thinks is the problem (if there's a PostScript error). Other PDF problems usually send some kind of back-channel output.

Notice that the Ghostscript message references the xref table as the problem:

**** Warning: An error occurred while reading an XREF table.

So I suspect your xref table is incorrect (also see below, object 0).

Non-breaking, but not best practice:

xref entry 0, the head of the linked list of free objects, has an offset of 0000000028 should be 0.

Your file seems to end $$EOF instead of %%EOF.

Its normal practice to place binary in a comment on line 2 in order to force applications to treat the file as binary when transmitting

Better to elide the Resources dictionary than use a null object, its smaller.

Similarly, better to have a single Contents stream (despite recent Adobe engines producing multiple streams) again because its smaller.

Obviously this is an early work in progress, I'm sure you will deal with these in time.

If you'll post the actual PDF file somewhere I can take a look.

[edit]

So the first problem is that the xref table subsection is incorrect. The subsection starts with 2 numbers, the initial index, and the number of entries in the table. The xref table has 5 entries starting from index 0 and going up to index 4. The subsection says

0 4

Correcting that to 0 5 leads us to the next problem, the Size entry in the trailer dictionary is 4, and should be 5.

But Ghostscript still complains.

The final problem is that the startxref offset is incorrect. Currently this is:

startxref 1581

But the actual byte offset of the 'xref' keyword is byte 1576.

If I correct all 3 of these problems then Ghostscript opens the file without complaint. It already did render the content of course (very tiny because there's no CTM operations) but now it doesn't have to fix the file.