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This works when run but crashes when tested. UAF? Zig bug?
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| const std = @import("std"); | |
| const testing = std.testing; | |
| const print = std.debug.print; | |
| const Node = struct { | |
| const Self = @This(); | |
| data: u8, | |
| children: ?std.StringHashMap(*Self) = null, | |
| fn init(data: u8) Self { | |
| return Self{ .data = data }; | |
| } | |
| fn deinit(self: *Self, allocator: *std.mem.Allocator) void { | |
| if (self.children == null) return; | |
| var iter = self.children.?.iterator(); | |
| while (iter.next()) |kv| { | |
| kv.value_ptr.*.deinit(allocator); | |
| allocator.destroy(kv.value_ptr); | |
| // allocator.destroy(kv.key_ptr); | |
| } | |
| self.children.?.deinit(); | |
| } | |
| fn addChild(self: *Self, allocator: *std.mem.Allocator, data: u8) anyerror!*Self { | |
| const newName = try std.fmt.allocPrint(allocator, "{}", .{data}); | |
| // defer allocator.free(newName); | |
| // Make sure we have a place to store the child | |
| if (self.children == null) { | |
| self.children = std.StringHashMap(*Self).init(allocator); | |
| } | |
| var ptr = try allocator.create(Self); | |
| ptr.* = Self.init(data); | |
| try self.children.?.put(newName, ptr); | |
| return ptr; | |
| } | |
| }; | |
| pub fn main() anyerror!void { | |
| var arena = std.heap.ArenaAllocator.init(std.heap.page_allocator); | |
| defer arena.deinit(); | |
| const allocator = &arena.allocator; | |
| try testFn(allocator); | |
| } | |
| fn testFn(allocator: *std.mem.Allocator) anyerror!void { | |
| var data: u8 = 0; | |
| var n = Node.init(data); | |
| // Child 0-1 (1) | |
| data += 1; | |
| _ = try n.addChild(allocator, data); | |
| n.deinit(allocator); | |
| } | |
| test "init and deinit" { | |
| try testFn(testing.allocator); | |
| } |
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