Avoid an obscure race condition between a checkpointer and a writer wrapping around...

FossilOrigin-Name: 7168988acbec2d8d51106a263e553f8942b8b23d983dbbe5028e0f9be68cbb83

diff --cc manifest
index 4dd41bd07e3be6e8f0187893c3f58b560e192077,d9c8c6fae971b3cc2d6eda74d2d8ddebe3eead45..ea0c2eff2dbdde7efe5569de18a343fadd425c9c
--- 1/manifest
--- 2/manifest
+++ b/manifest
@@@ -1,5 -1,5 +1,5 @@@
- C Convert\smany\ssqlite3_realloc()\scalls\sto\ssqlite3_realloc64().
- D 2026-03-02T17:11:44.720
 -C Do\snot\srun\stest\sscript\swalrestart.test\swith\sthe\s"memsubsys1"\spermutation.
 -D 2026-03-03T18:34:38.064
++C Avoid\san\sobscure\srace\scondition\sbetween\sa\scheckpointer\sand\sa\swriter\swrapping\saround\sto\sthe\sstart\sof\sthe\swal\sfile.
++D 2026-03-03T19:43:19.771
  F .fossil-settings/binary-glob 61195414528fb3ea9693577e1980230d78a1f8b0a54c78cf1b9b24d0a409ed6a x
  F .fossil-settings/empty-dirs dbb81e8fc0401ac46a1491ab34a7f2c7c0452f2f06b54ebb845d024ca8283ef1
  F .fossil-settings/ignore-glob 35175cdfcf539b2318cb04a9901442804be81cd677d8b889fcc9149c21f239ea
@@@ -2188,9 -2189,8 +2189,9 @@@ F tool/warnings-clang.sh bbf6a1e685e534
  F tool/warnings.sh d924598cf2f55a4ecbc2aeb055c10bd5f48114793e7ba25f9585435da29e7e98
  F tool/win/sqlite.vsix deb315d026cc8400325c5863eef847784a219a2f
  F tool/winmain.c 00c8fb88e365c9017db14c73d3c78af62194d9644feaf60e220ab0f411f3604c
- P 204f25c882832058c3291d4d6a0a6ac2711c081cb91b19feb2cf94a25ed61ecf a391f5646926787fd9a004225ea406b61d20f282c852c0282fd26cada644b601
- R fd09c97895a4cac92ff79c9e4e8d0ece
- T +closed a391f5646926787fd9a004225ea406b61d20f282c852c0282fd26cada644b601
- U drh
- Z f2554e3cff169f1dfd8e4679b455ef58
 -P decb69015457b4f70cf574aeef87d40f9de60b94965f4a915e8d0cd7559ef2ae
++P 88dce64242552e7443d9fb496f6f3ad71dc5b4a882ce21b7ef1d5ea4e26f1e61 703cbb0f760515eac1e6f72a5e5cd928258c71378e4a976082b6518c90128135
+ R 081029f3feecf24cb4be31bd4056634e
++T +closed 703cbb0f760515eac1e6f72a5e5cd928258c71378e4a976082b6518c90128135
+ U dan
 -Z 6e3cc1dc135fda8b3b63884b6a3aae0a
++Z aa660315ed5ec6682f68be7645c0d8b8
  # Remove this line to create a well-formed Fossil manifest.

diff --cc manifest.uuid
index 1ae350648d7783bd8ce51722f674bf334e993e41,f688381a367937b2df8fb47d117f66953a61accc..5e463bf5c673444ed7cc62197a003caf4bdbf4ee
--- 1/manifest.uuid
--- 2/manifest.uuid
+++ b/manifest.uuid
@@@ -1,1 -1,1 +1,1 @@@
- 88dce64242552e7443d9fb496f6f3ad71dc5b4a882ce21b7ef1d5ea4e26f1e61
 -703cbb0f760515eac1e6f72a5e5cd928258c71378e4a976082b6518c90128135
++7168988acbec2d8d51106a263e553f8942b8b23d983dbbe5028e0f9be68cbb83