log: prevent negative date range from displaying entire log (issue1805)

mercurial/commands.py

@@ -2044,7 +2044,7 b' def log(ui, repo, *pats, **opts):'
             if only_branches and ctx.branch() not in only_branches:
                 continue
 
-            if df and not df(ctx.date()):
+            if df and not df(ctx.date()[0]):
                 continue
 
             if opts.get('keyword'):

tests/test-log

@@ -107,6 +107,9 b' hg log -r 100000000000000000000000000000'
 echo '% log -k r1'
 hg log -k r1
 
+echo '% log -d -1'
+hg log -d -1
+
 cd ..
 
 hg init usertest

tests/test-log.out

@@ -245,6 +245,7 b' user: test'
 date:        Thu Jan 01 00:00:01 1970 +0000
 summary:     r1
 
+% log -d -1
 adding a
 adding b
 changeset:   0:29a4c94f1924