diff --git a/manifest b/manifest
index b01d6fa7e7..60a9580844 100644
--- a/manifest
+++ b/manifest
@@ -1,5 +1,5 @@
-C Mark\sa\ssingle\sbranch\sas\sno\slonger\sreachable.
-D 2019-04-19T23:05:56.134
+C Fix\san\sassert()\sthat\smay\sbe\sfalse\sfor\scorrupt\sdatabases.
+D 2019-04-22T11:47:40.572
 F .fossil-settings/empty-dirs dbb81e8fc0401ac46a1491ab34a7f2c7c0452f2f06b54ebb845d024ca8283ef1
 F .fossil-settings/ignore-glob 35175cdfcf539b2318cb04a9901442804be81cd677d8b889fcc9149c21f239ea
 F LICENSE.md df5091916dbb40e6e9686186587125e1b2ff51f022cc334e886c19a0e9982724
@@ -459,7 +459,7 @@ F src/auth.c 0fac71038875693a937e506bceb492c5f136dd7b1249fbd4ae70b4e8da14f9df
 F src/backup.c 78d3cecfbe28230a3a9a1793e2ead609f469be43e8f486ca996006be551857ab
 F src/bitvec.c 17ea48eff8ba979f1f5b04cc484c7bb2be632f33
 F src/btmutex.c 8acc2f464ee76324bf13310df5692a262b801808984c1b79defb2503bbafadb6
-F src/btree.c 958939f608e351a36756e3749596472baa0e5aae54eebd14e6beffe7a68aafc7
+F src/btree.c ffe7101006aee2ab9e9dec2fc001998e57a8e59419c6ea4072d6c3935d3d50fb
 F src/btree.h c11446f07ec0e9dc85af8041cb0855c52f5359c8b2a43e47e02a685282504d89
 F src/btreeInt.h 6111c15868b90669f79081039d19e7ea8674013f907710baa3c814dc3f8bfd3f
 F src/build.c 61655dad911a967a69fb49df57268fd15ce8f1af3fe0a1bd90c128ef2cacfb7a
@@ -762,7 +762,7 @@ F test/corruptH.test 79801d97ec5c2f9f3c87739aa1ec2eb786f96454
 F test/corruptI.test a17bbf54fdde78d43cf3cc34b0057719fd4a173a3d824285b67dc5257c064c7b
 F test/corruptJ.test 4d5ccc4bf959464229a836d60142831ef76a5aa4
 F test/corruptK.test 5b4212fe346699831c5ad559a62c54e11c0611bdde1ea8423a091f9c01aa32af
-F test/corruptL.test a569f3cece872a1f21568bd5378f55ce5c365c50845a06fae65a2721cce62264
+F test/corruptL.test 13763e4769eeef308badfcc95dea5d5e00e61a1732a1214a48ff24d3f5db8cbc
 F test/cost.test 51f4fcaae6e78ad5a57096831259ed6c760e2ac6876836e91c00030fad385b34
 F test/count.test cb2e0f934c6eb33670044520748d2ecccd46259c
 F test/countofview.test e3d4cd6900e4e4f074968ab24b8b87d3671cd624961bef40fd3a6b8f574343cf
@@ -1818,7 +1818,7 @@ F vsixtest/vsixtest.tcl 6a9a6ab600c25a91a7acc6293828957a386a8a93
 F vsixtest/vsixtest.vcxproj.data 2ed517e100c66dc455b492e1a33350c1b20fbcdc
 F vsixtest/vsixtest.vcxproj.filters 37e51ffedcdb064aad6ff33b6148725226cd608e
 F vsixtest/vsixtest_TemporaryKey.pfx e5b1b036facdb453873e7084e1cae9102ccc67a0
-P 6cf16703fd4a835c249c947006ae4a4bf81873c8ca1803945453c9845f882dc1
-R ff3642bada516bde6836db167619c845
-U drh
-Z 2a6d21c59c4950c9897c2627e0f9536a
+P 4f35b3b78a461b0617a5cd04f60d2ab277bcc7c994dae463851a3cb5d041a723
+R b79fbec9cc96d7584a3a8f94492a3f38
+U dan
+Z 002b02d6adc168b9ce09f7701a50dc63
diff --git a/manifest.uuid b/manifest.uuid
index 43ee2ab2a5..0b8dab0f77 100644
--- a/manifest.uuid
+++ b/manifest.uuid
@@ -1 +1 @@
-4f35b3b78a461b0617a5cd04f60d2ab277bcc7c994dae463851a3cb5d041a723
\ No newline at end of file
+b2ce5ed175cb5029ac07392ae371c86eeec23c74624aad007dee51cf359f3eeb
\ No newline at end of file
diff --git a/src/btree.c b/src/btree.c
index b31f74e794..e282ff4ed4 100644
--- a/src/btree.c
+++ b/src/btree.c
@@ -4284,10 +4284,9 @@ int sqlite3BtreeSavepoint(Btree *p, int op, int iSavepoint){
       rc = newDatabase(pBt);
       pBt->nPage = get4byte(28 + pBt->pPage1->aData);
 
-      /* The database size was written into the offset 28 of the header
-      ** when the transaction started, so we know that the value at offset
-      ** 28 is nonzero. */
-      assert( pBt->nPage>0 );
+      /* pBt->nPage might be zero if the database was corrupt when 
+      ** the transaction was started. Otherwise, it must be at least 1.  */
+      assert( CORRUPT_DB || pBt->nPage>0 );
     }
     sqlite3BtreeLeave(p);
   }
diff --git a/test/corruptL.test b/test/corruptL.test
index 213af9d343..6f129e8408 100644
--- a/test/corruptL.test
+++ b/test/corruptL.test
@@ -838,4 +838,32 @@ do_catchsql_test 8.1 {
   INSERT INTO t3 SELECT * FROM t2;
 } {1 {database disk image is malformed}}
 
+#-------------------------------------------------------------------------
+reset_db
+do_test 9.0 {
+  sqlite3 db {}
+  db deserialize [decode_hexdb {
+| size 8192 pagesize 4096 filename crash-ab10597e4e1c32.db
+| page 1 offset 0
+|      0: 53 51 4c 69 74 65 20 66 6f 72 6d 61 74 20 33 00   SQLite format 3.
+|     16: 10 00 01 01 00 40 20 20 00 00 00 00 00 00 00 00   .....@  ........
+|     96: 00 00 00 00 0d 00 00 00 01 0f d6 00 0f d6 00 00   ................
+|   4048: 00 00 00 00 00 00 28 01 06 17 11 11 01 3d 74 61   ......(......=ta
+|   4064: 62 6c 65 74 31 74 31 02 43 52 45 41 54 45 20 54   blet1t1.CREATE T
+|   4080: 41 42 4c 45 20 74 31 28 61 2c 62 2c 63 2c 64 29   ABLE t1(a,b,c,d)
+| page 2 offset 4096
+|      0: 0d 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00   ................
+| end crash-ab10597e4e1c32.db
+}]} {}
+
+do_execsql_test 9.1 {
+  SAVEPOINT one;
+}
+do_catchsql_test 9.3 {
+  INSERT INTO t1(b,c) VALUES(5,6);
+} {1 {database disk image is malformed}}
+do_execsql_test 9.3 {
+  ROLLBACK TO one;
+}
+
 finish_test