pitrou commented on code in PR #45498:
URL: https://github.com/apache/arrow/pull/45498#discussion_r1952507186


##########
cpp/src/arrow/csv/parser.cc:
##########
@@ -172,11 +172,17 @@ class ResizableValueDescWriter : public 
ValueDescWriter<ResizableValueDescWriter
 
   void PushValue(ParsedValueDesc v) {
     if (ARROW_PREDICT_FALSE(values_size_ == values_capacity_)) {
-      values_capacity_ = values_capacity_ * 2;
-      status_ &= values_buffer_->Resize(values_capacity_ * sizeof(*values_));
-      values_ = 
reinterpret_cast<ParsedValueDesc*>(values_buffer_->mutable_data());
+      int64_t new_capacity = values_capacity_ * 2;
+      auto resize_status = values_buffer_->Resize(new_capacity * 
sizeof(*values_));
+      if (resize_status.ok()) {
+        values_ = 
reinterpret_cast<ParsedValueDesc*>(values_buffer_->mutable_data());
+        values_capacity_ = new_capacity;
+      }
+      status_ &= std::move(resize_status);
+    }
+    if (ARROW_PREDICT_TRUE(status_.ok())) {

Review Comment:
   I could add comments to explain this if that's useful.



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