core: Fix server list not deduped due to double free ``` valgrind --leak-check=full --show-leak-kinds=all --track-origins=yes --num-callers=15 -s ./zig-out/bin/plac server ls -c 10 ``` When a same Roon Server responds more than one time, servers hashmap gets corrupted entry due to having a free-d key.

Changes

1 changed files (+7/-4)

• core/src/mod.zig
  • @@ -115,10 +115,13 @@ self.allocator.free(message);
    continue; }; - if (self.servers.get(response.unique_id)) |existing| { - // Release copied buffers. - self.allocator.free(existing.message); - } + const stale_message: ?[]const u8 = if (self.servers.get(response.unique_id)) |existing| + existing.message + else + null; + defer if (stale_message) |msg| { + self.allocator.free(msg); + }; try self.servers.put(response.unique_id, Server{ .message = message,