diff --git a/CHANGES b/CHANGES
index 88f68c6304..a600b3a66c 100644
--- a/CHANGES
+++ b/CHANGES
@@ -1,3 +1,14 @@
+4.1.0-dev.266 | 2021-02-25 08:45:49 -0700
+
+  * Avoid superfluous string copies when adding to zeek::detail::sig_files
+
+    Coverity 1387015 (Jon Siwek, Corelight)
+
+  * Initialize an RD_Decorate member via std::move (Jon Siwek, Corelight)
+
+  * Fix invalid iterator comparison in UseDefs::FindSuccUsage()
+
+    Coverity 1447018 (Jon Siwek, Corelight)
 
 4.1.0-dev.260 | 2021-02-24 15:52:31 -0800
 
diff --git a/VERSION b/VERSION
index 772ef5ce0a..66d4a27af3 100644
--- a/VERSION
+++ b/VERSION
@@ -1 +1 @@
-4.1.0-dev.260
+4.1.0-dev.266
diff --git a/src/scan.l b/src/scan.l
index 198843fe83..5052e7583c 100644
--- a/src/scan.l
+++ b/src/scan.l
@@ -357,7 +357,7 @@ when	return TOK_WHEN;
 			zeek::reporter->Error("failed to find file associated with @load-sigs %s",
 			                      file);
 		else
-			zeek::detail::sig_files.push_back(zeek::util::copy_string(path.c_str()));
+			zeek::detail::sig_files.push_back(std::move(path));
 		break;
 
 	case 0:
diff --git a/src/script_opt/GenRDs.h b/src/script_opt/GenRDs.h
index 3d3536bad6..38202cbb6c 100644
--- a/src/script_opt/GenRDs.h
+++ b/src/script_opt/GenRDs.h
@@ -50,7 +50,7 @@ private:
 
 class RD_Decorate : public TraversalCallback {
 public:
-	RD_Decorate(std::shared_ptr<ProfileFunc> _pf) : pf(_pf)
+	RD_Decorate(std::shared_ptr<ProfileFunc> _pf) : pf(std::move(_pf))
 		{ }
 
 	// Traverses the given function body, using the first two
diff --git a/src/script_opt/UseDefs.cc b/src/script_opt/UseDefs.cc
index ffef5bae43..f8476e5d68 100644
--- a/src/script_opt/UseDefs.cc
+++ b/src/script_opt/UseDefs.cc
@@ -444,7 +444,7 @@ UDs UseDefs::FindSuccUsage(const Stmt* s) const
 	auto uds = no_succ ? nullptr : FindUsage(succ->second);
 
 	auto succ2 = successor2.find(s);
-	auto no_succ2 = (succ2 == successor.end() || ! succ2->second);
+	auto no_succ2 = (succ2 == successor2.end() || ! succ2->second);
 	auto uds2 = no_succ2 ? nullptr : FindUsage(succ2->second);
 
 	if ( uds && uds2 )