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fix: ExtentTree use of invalidated iterator (#4416)

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Fixes accessing and invalidated iterator within ExtendTree
This commit is contained in:
Kostas Kyrimis 2025-01-07 14:38:32 +02:00 • committed by GitHub
parent aaf33d5a1f
commit e8f43d6858
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GPG key ID: B5690EEEBB952194
1 changed files with 5 additions and 4 deletions
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9
src/core/extent_tree.cc
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@ -16,7 +16,7 @@ void ExtentTree::Add(size_t start, size_t len) {
DCHECK_EQ(len_extents_.size(), extents_.size());
auto it = extents_.lower_bound(start);
optional<absl::btree_map<size_t, size_t>::iterator> prev_extent;
optional<size_t> prev_extent_key;
if (it != extents_.begin()) {
auto prev = it;
@ -29,7 +29,7 @@ void ExtentTree::Add(size_t start, size_t len) {
prev->second += len;
start = prev->first;
len += prev_len;
prev_extent = prev;
prev_extent_key = prev->first;
}
}
@ -44,8 +44,9 @@ void ExtentTree::Add(size_t start, size_t len) {
}
len_extents_.emplace(len, start);
if (prev_extent) {
(*prev_extent)->second = start + len;
if (prev_extent_key) {
DCHECK(extents_.find(*prev_extent_key) != extents_.end());
extents_[*prev_extent_key] = start + len;
} else {
extents_.emplace(start, start + len);
}