diff --git a/AUTHORS b/AUTHORS
index 110220f761..c97790c7fa 100644
--- a/AUTHORS
+++ b/AUTHORS
@@ -122,6 +122,7 @@ David Thomas <davidthomas426@gmail.com>
 David Titarenco <david.titarenco@gmail.com>
 Dean Prichard <dean.prichard@gmail.com>
 Denis Brandolini <denis.brandolini@gmail.com>
+Derek Parker <parkerderek86@gmail.com>
 Devon H. O'Dell <devon.odell@gmail.com>
 Dhiru Kholia <dhiru.kholia@gmail.com>
 Dimitri Tcaciuc <dtcaciuc@gmail.com>
diff --git a/CONTRIBUTORS b/CONTRIBUTORS
index 287d7ffc55..1053057b5a 100644
--- a/CONTRIBUTORS
+++ b/CONTRIBUTORS
@@ -187,6 +187,7 @@ David Thomas <davidthomas426@gmail.com>
 David Titarenco <david.titarenco@gmail.com>
 Dean Prichard <dean.prichard@gmail.com>
 Denis Brandolini <denis.brandolini@gmail.com>
+Derek Parker <parkerderek86@gmail.com>
 Devon H. O'Dell <devon.odell@gmail.com>
 Dhiru Kholia <dhiru.kholia@gmail.com>
 Dimitri Tcaciuc <dtcaciuc@gmail.com>
diff --git a/lib/codereview/codereview.py b/lib/codereview/codereview.py
index 38c0553005..a64401533c 100644
--- a/lib/codereview/codereview.py
+++ b/lib/codereview/codereview.py
@@ -307,14 +307,19 @@ class CL(object):
 		dir = CodeReviewDir(ui, repo)
 		os.unlink(dir + "/cl." + self.name)
 
-	def Subject(self):
+	def Subject(self, ui, repo):
+		branchPrefix = ""
+		branch = repo[None].branch()
+		if branch.startswith("dev."):
+			branchPrefix = "[" + branch + "] "
+
 		s = line1(self.desc)
 		if len(s) > 60:
 			s = s[0:55] + "..."
 		if self.name != "new":
 			s = "code review %s: %s" % (self.name, s)
 		typecheck(s, str)
-		return s
+		return branchPrefix + s
 
 	def Upload(self, ui, repo, send_mail=False, gofmt=True, gofmt_just_warn=False, creating=False, quiet=False):
 		if not self.files and not creating:
@@ -324,10 +329,6 @@ class CL(object):
 		set_status("uploading CL metadata + diffs")
 		os.chdir(repo.root)
 
-		branchPrefix = ""
-		branch = repo[None].branch()
-		if branch.startswith("dev."):
-			branchPrefix = "[" + branch + "] "
 		form_fields = [
 			("content_upload", "1"),
 			("reviewers", JoinComma(self.reviewer)),
@@ -363,7 +364,8 @@ class CL(object):
 			form_fields.append(("subject", "diff -r " + vcs.base_rev + " " + ui.expandpath("default")))
 		else:
 			# First upload sets the subject for the CL itself.
-			form_fields.append(("subject", branchPrefix+self.Subject()))
+			form_fields.append(("subject", self.Subject(ui, repo)))
+		
 		ctype, body = EncodeMultipartFormData(form_fields, uploaded_diff_file)
 		response_body = MySend("/upload", body, content_type=ctype)
 		patchset = None
@@ -416,7 +418,7 @@ class CL(object):
 		else:
 			pmsg += "Please take another look.\n"
 		typecheck(pmsg, str)
-		PostMessage(ui, self.name, pmsg, subject=self.Subject())
+		PostMessage(ui, self.name, pmsg, subject=self.Subject(ui, repo))
 		self.mailed = True
 		self.Flush(ui, repo)
 
@@ -3476,11 +3478,23 @@ class MercurialVCS(VersionControlSystem):
 		if not err and mqparent != "":
 			self.base_rev = mqparent
 		else:
-			out = RunShell(["hg", "parents", "-q"], silent_ok=True).strip()
+			out = RunShell(["hg", "parents", "-q", "--template={node} {branch}"], silent_ok=True).strip()
 			if not out:
 				# No revisions; use 0 to mean a repository with nothing.
-				out = "0:0"
-			self.base_rev = out.split(':')[1].strip()
+				out = "0:0 default"
+			
+			# Find parent along current branch.
+			branch = repo[None].branch()
+			base = ""
+			for line in out.splitlines():
+				fields = line.strip().split(' ')
+				if fields[1] == branch:
+					base = fields[0]
+					break
+			if base == "":
+				# Use the first parent
+				base = out.strip().split(' ')[0]
+			self.base_rev = base
 
 	def _GetRelPath(self, filename):
 		"""Get relative path of a file according to the current directory,
diff --git a/src/pkg/debug/dwarf/type.go b/src/pkg/debug/dwarf/type.go
index 7b5f1cf7b9..e59737b0a4 100644
--- a/src/pkg/debug/dwarf/type.go
+++ b/src/pkg/debug/dwarf/type.go
@@ -88,6 +88,11 @@ type AddrType struct {
 	BasicType
 }
 
+// A UnspecifiedType represents implicit, unknown, ambiguous or nonexistent type.
+type UnspecifiedType struct {
+	BasicType
+}
+
 // qualifiers
 
 // A QualType represents a type that has the C/C++ "const", "restrict", or "volatile" qualifier.
@@ -630,6 +635,15 @@ func (d *Data) readType(name string, r typeReader, off Offset, typeCache map[Off
 		typeCache[off] = t
 		t.Name, _ = e.Val(AttrName).(string)
 		t.Type = typeOf(e)
+
+	case TagUnspecifiedType:
+		// Unspecified type (DWARF v3 §5.2)
+		// Attributes:
+		//	AttrName: name
+		t := new(UnspecifiedType)
+		typ = t
+		typeCache[off] = t
+		t.Name, _ = e.Val(AttrName).(string)
 	}
 
 	if err != nil {