Hi,
I'm analyzing a corrupt SQLite database file using the showdb tool. I'm not sure how to interpret the following output:
```
ERROR: page 641 used multiple times:
ERROR: previous: overflow 1 from cell 0 of page 128
ERROR: current: overflow 1 from cell 0 of page 128
ERROR: page 604 used multiple times:
ERROR: previous: overflow 1 from cell 1 of page 128
ERROR: current: overflow 1 from cell 1 of page 128
ERROR: page 667 used multiple times:
ERROR: previous: overflow 1 from cell 2 of page 128
ERROR: current: overflow 1 from cell 2 of page 128
ERROR: page 555 used multiple times:
ERROR: previous: overflow 1 from cell 3 of page 128
ERROR: current: overflow 1 from cell 3 of page 128
ERROR: page 172 used multiple times:
ERROR: previous: overflow 1 from cell 4 of page 128
ERROR: current: overflow 1 from cell 4 of page 128
ERROR: page 204 used multiple times:
ERROR: previous: overflow 1 from cell 5 of page 128
ERROR: current: overflow 1 from cell 5 of page 128
ERROR: page 592 used multiple times:
ERROR: previous: overflow 1 from cell 6 of page 128
ERROR: current: overflow 1 from cell 6 of page 128
```
Also, I had to apply the following patch to avoid crashing on double free when running showdb:
```
>fossil diff
Index: tool/showdb.c
==================================================================
--- tool/showdb.c
+++ tool/showdb.c
@@ -793,10 +793,12 @@
if( zPageUse[pgno]!=0 ){
printf("ERROR: page %d used multiple times:\n", pgno);
printf("ERROR: previous: %s\n", zPageUse[pgno]);
printf("ERROR: current: %s\n", zMsg);
sqlite3_free(zPageUse[pgno]);
+ zPageUse[pgno] = 0;
}
zPageUse[pgno] = zMsg;
}
```