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Add explicit error message for too many frees

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Benjamin Feng 2020-01-30 01:12:21 -06:00
parent 46d84a1b63
commit 9c196efa2a
1 changed files with 3 additions and 0 deletions
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3
lib/std/testing/leak_count_allocator.zig
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@ -33,6 +33,9 @@ pub const LeakCountAllocator = struct {
fn shrink(allocator: *std.mem.Allocator, old_mem: []u8, old_align: u29, new_size: usize, new_align: u29) []u8 {
const self = @fieldParentPtr(LeakCountAllocator, "allocator", allocator);
if (new_size == 0) {
if (self.count == 0) {
std.debug.panic("error - too many calls to free, most likely double free", .{});
}
self.count -= 1;
}
return self.internal_allocator.shrinkFn(self.internal_allocator, old_mem, old_align, new_size, new_align);