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Comments (4)

residuum avatar residuum commented on June 19, 2024

Does the problem occur, when you load the file for the second time? If so, then I can reproduce this bug, because [json-encode] is then crashing while freeing the first stored object.

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nyboer avatar nyboer commented on June 19, 2024

Yes, it seems to be a problem on the 2nd click. If I click it once, it seems to do nothing, if I click it again, it crashes pd with an error like:

*** Error in `pd': free(): invalid pointer: 0x000ed7cf ***

Also, I tried to hang a "print" object off the end of that [t a a]. PD hangs, and I got

 *** Error in `pd': corrupted double-linked list: 0x000ed878 ***

in the terminal. Can't consistently reproduce that, though.

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residuum avatar residuum commented on June 19, 2024

Update:

  1. [read( on [json-encode] does not output anything, it only loads the content of the file. To output the stored JSON, use [bang(.
  2. It boils down to json_object_put() from json-c segfaulting. Investigating in it right now.

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residuum avatar residuum commented on June 19, 2024

OK, I have already had the same issue with [json-decode]. Time to make a sample application in C and report the bug to json-c.

This segfaults:

json_object_put(jobj);

This is the segfault in [json-decode]:

/*json_object_put(jobj);*/

Not calling json_object_put() leads to memory leaks, which would be a workaround, but should be fixed. I will commit a hotfix wth a commented out line in json-encode.c, and will work with json-c maintainers to fix that issue later.

Similar issue reported to json-c
json-c/json-c#158

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