Index: ext/misc/fileio.c
==================================================================
--- ext/misc/fileio.c
+++ ext/misc/fileio.c
@@ -494,10 +494,11 @@
   sqlite3_free(pCur->aLvl);
   pCur->aLvl = 0;
   pCur->zPath = 0;
   pCur->zBase = 0;
   pCur->nBase = 0;
+  pCur->nLvl = 0;
   pCur->iLvl = -1;
   pCur->iRowid = 1;
 }
 
 /*

Index: test/zipfile.test
==================================================================
--- test/zipfile.test
+++ test/zipfile.test
@@ -512,10 +512,18 @@
   } [list {*}{
     test_unzip/a.txt 946684800
     test_unzip/b.txt 1000000000 
     test_unzip/c.txt 1111111000 
   }]
+
+  # fsdir() issue reported on the mailing list on 2018-03-14 by Jack Thaw.
+  do_test 6.0b {
+    db eval {
+      SELECT sum(name LIKE '%/a.txt')
+      FROM (VALUES(1),(2),(3)) CROSS JOIN fsdir('test_unzip')
+    }
+  } {3}
 
   do_execsql_test 6.1 {
     SELECT name, mtime, data FROM zipfile('test1.zip')
   } {
     a.txt 946684800   abc