From f406481849b7acf289257fce40153e0c72cbf9aa Mon Sep 17 00:00:00 2001
From: Kim Seon Woo <69591622+seonwoo960000@users.noreply.github.com>
Date: Fri, 16 Aug 2024 19:56:06 +0900
Subject: [PATCH] Explain why it fails

---
 core/storage/sqlite3_ondisk.rs |   2 ++
 database.db                    | Bin 0 -> 8192 bytes
 2 files changed, 2 insertions(+)
 create mode 100644 database.db

diff --git a/core/storage/sqlite3_ondisk.rs b/core/storage/sqlite3_ondisk.rs
index e03e29729..d085128d4 100644
--- a/core/storage/sqlite3_ondisk.rs
+++ b/core/storage/sqlite3_ondisk.rs
@@ -495,6 +495,7 @@ fn finish_read_page(
 pub fn begin_write_btree_page(pager: &Pager, page: &Rc<RefCell<Page>>) -> Result<()> {
     let page_source = &pager.page_io;
     let page_finish = page.clone();
+    // page.borrow() returns RefCell<Page> which remains active for the entire begin_write_btree_page function
     let page = page.borrow();
 
     let contents = page.contents.read().unwrap();
@@ -505,6 +506,7 @@ pub fn begin_write_btree_page(pager: &Pager, page: &Rc<RefCell<Page>>) -> Result
         Box::new(move |bytes_written: i32| {
             let buf_copy = buf_copy.clone();
             let buf_len = buf_copy.borrow().len();
+            // requires a mutable borrow of the page_finish's RefCell<Page>
             page_finish.borrow_mut().clear_dirty();
             if bytes_written < buf_len as i32 {
                 log::error!("wrote({bytes_written}) less than expected({buf_len})");
diff --git a/database.db b/database.db
new file mode 100644
index 0000000000000000000000000000000000000000..51f2d758f1c9cf49ae717efca7e4bc502cc793c6
GIT binary patch
literal 8192
zcmeI#u?oU45C-78R@@}w(!u3M1#$5O)RI9ELCxUWVidtvY3u8`=tKArK7?t}NkQBk
z{+}er9T~#6WjUYj3M-pKmPCaNs7cH;6d@vZ+jIMsvah`wSIhoenEK(R;cl@ylUoP`
zAOHafKmY;|fB*y_009U<00KV?47nZz0Y^m?@9inKSzaApxX>e`#f-*NE!9XmyR}Sa
zrdPFTlvpu(WxD0x+*empcXe|GfdB*`009U<00Izz00bZa0SG|gPX$`OUvEF(#z&jR
NHruwm4>NwBJpjV&Dc1l1

literal 0
HcmV?d00001