The free() function crashes on Windows

[ObserverOfTime]

free() is used in these 3 places and it only crashes on Windows.
I don't know how to debug this, so I've disabled the calls for the time being.
This may lead to minor memory leaks but at least it won't crash.

java-tree-sitter/src/main/java/io/github/treesitter/jtreesitter/Node.java

Line 443 in 9c5eb24

if (IS_UNIX) free(string);

java-tree-sitter/src/main/java/io/github/treesitter/jtreesitter/Tree.java

Line 98 in 9c5eb24

if (IS_UNIX) free(ranges);

java-tree-sitter/src/main/java/io/github/treesitter/jtreesitter/Tree.java

Line 125 in 9c5eb24

if (IS_UNIX) free(ranges);

[maloewe-ona]

It seems when using ts_set_allocator to specify custom allocation functions which just use the standard malloc, free, ... then the JVM does not crash, see https://github.com/maloewe-ona/java-tree-sitter/tree/windows-custom-alloc (unless I made a mistake there)

This is not really a useful workaround, but maybe it is helpful for finding the cause or it gives a hint what could be the reason? It seems somehow the default allocation functions used by tree-sitter internally are not compatible with the free function obtained through FFM on Windows. But each on their own works correctly: The default tree-sitter allocation functions work fine when tree-sitter internally allocates and frees memory, and configuring tree-sitter to only use the allocation functions through FFM (as done with the ts_set_allocator approach above) also works fine. Only the combination of memory allocated internally by tree-sitter but freed through FFM with free seems to be an issue.

I also tried to use ts_current_free instead of free but that crashes the JVM as well on Windows for me.