diff --git a/.travis.yml b/.travis.yml
index 209d89f..f796389 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -9,6 +9,7 @@ go:
   - 1.2
   - 1.3
   - 1.4
+  - 1.5
   - tip
 
 matrix:
diff --git a/README.md b/README.md
index 490386c..a5e6100 100644
--- a/README.md
+++ b/README.md
@@ -40,7 +40,7 @@ Parallelism and network operations
 ----------------------------------
 
 libgit2 uses OpenSSL and LibSSH2 for performing encrypted network connections. For now, git2go asks libgit2 to set locking for OpenSSL. This makes HTTPS connections thread-safe, but it is fragile and will likely stop doing it soon. This may also make SSH connections thread-safe if your copy of libssh2 is linked against OpenSSL. Check libgit2's `THREADSAFE.md` for more information.
-[
+
 Running the tests
 -----------------
 
diff --git a/branch.go b/branch.go
index d0a0835..df72dba 100644
--- a/branch.go
+++ b/branch.go
@@ -94,6 +94,7 @@ func (repo *Repository) CreateBranch(branchName string, target *Commit, force bo
 
 	var ptr *C.git_reference
 	cBranchName := C.CString(branchName)
+	defer C.free(unsafe.Pointer(cBranchName))
 	cForce := cbool(force)
 
 	runtime.LockOSThread()
@@ -120,6 +121,7 @@ func (b *Branch) Delete() error {
 func (b *Branch) Move(newBranchName string, force bool) (*Branch, error) {
 	var ptr *C.git_reference
 	cNewBranchName := C.CString(newBranchName)
+	defer C.free(unsafe.Pointer(cNewBranchName))
 	cForce := cbool(force)
 
 	runtime.LockOSThread()
@@ -152,6 +154,7 @@ func (repo *Repository) LookupBranch(branchName string, bt BranchType) (*Branch,
 	var ptr *C.git_reference
 
 	cName := C.CString(branchName)
+	defer C.free(unsafe.Pointer(cName))
 
 	runtime.LockOSThread()
 	defer runtime.UnlockOSThread()
@@ -180,6 +183,7 @@ func (b *Branch) Name() (string, error) {
 
 func (repo *Repository) RemoteName(canonicalBranchName string) (string, error) {
 	cName := C.CString(canonicalBranchName)
+	defer C.free(unsafe.Pointer(cName))
 
 	nameBuf := C.git_buf{}
 
@@ -197,6 +201,7 @@ func (repo *Repository) RemoteName(canonicalBranchName string) (string, error) {
 
 func (b *Branch) SetUpstream(upstreamName string) error {
 	cName := C.CString(upstreamName)
+	defer C.free(unsafe.Pointer(cName))
 
 	runtime.LockOSThread()
 	defer runtime.UnlockOSThread()
@@ -223,6 +228,7 @@ func (b *Branch) Upstream() (*Reference, error) {
 
 func (repo *Repository) UpstreamName(canonicalBranchName string) (string, error) {
 	cName := C.CString(canonicalBranchName)
+	defer C.free(unsafe.Pointer(cName))
 
 	nameBuf := C.git_buf{}
 
diff --git a/clone.go b/clone.go
index b5c5a5b..e80d14d 100644
--- a/clone.go
+++ b/clone.go
@@ -3,6 +3,7 @@ package git
 /*
 #include <git2.h>
 
+extern void _go_git_populate_remote_cb(git_clone_options *opts);
 */
 import "C"
 import (
@@ -10,13 +11,14 @@ import (
 	"unsafe"
 )
 
+type RemoteCreateCallback func(repo *Repository, name, url string) (*Remote, ErrorCode)
+
 type CloneOptions struct {
 	*CheckoutOpts
 	*FetchOptions
 	Bare                 bool
 	CheckoutBranch       string
-	RemoteCreateCallback C.git_remote_create_cb
-	RemoteCreatePayload  unsafe.Pointer
+	RemoteCreateCallback RemoteCreateCallback
 }
 
 func Clone(url string, path string, options *CloneOptions) (*Repository, error) {
@@ -28,6 +30,7 @@ func Clone(url string, path string, options *CloneOptions) (*Repository, error)
 
 	copts := (*C.git_clone_options)(C.calloc(1, C.size_t(unsafe.Sizeof(C.git_clone_options{}))))
 	populateCloneOptions(copts, options)
+	defer freeCloneOptions(copts)
 
 	if len(options.CheckoutBranch) != 0 {
 		copts.checkout_branch = C.CString(options.CheckoutBranch)
@@ -35,11 +38,10 @@ func Clone(url string, path string, options *CloneOptions) (*Repository, error)
 
 	runtime.LockOSThread()
 	defer runtime.UnlockOSThread()
+
 	var ptr *C.git_repository
 	ret := C.git_clone(&ptr, curl, cpath, copts)
 	freeCheckoutOpts(&copts.checkout_opts)
-	C.free(unsafe.Pointer(copts.checkout_branch))
-	C.free(unsafe.Pointer(copts))
 
 	if ret < 0 {
 		return nil, MakeGitError(ret)
@@ -48,6 +50,33 @@ func Clone(url string, path string, options *CloneOptions) (*Repository, error)
 	return newRepositoryFromC(ptr), nil
 }
 
+//export remoteCreateCallback
+func remoteCreateCallback(cremote unsafe.Pointer, crepo unsafe.Pointer, cname, curl *C.char, payload unsafe.Pointer) C.int {
+	name := C.GoString(cname)
+	url := C.GoString(curl)
+	repo := newRepositoryFromC((*C.git_repository)(crepo))
+	// We don't own this repository, so make sure we don't try to free it
+	runtime.SetFinalizer(repo, nil)
+
+	if opts, ok := pointerHandles.Get(payload).(CloneOptions); ok {
+		remote, err := opts.RemoteCreateCallback(repo, name, url)
+		// clear finalizer as the calling C function will
+		// free the remote itself
+		runtime.SetFinalizer(remote, nil)
+
+		if err == ErrOk && remote != nil {
+			cptr := (**C.git_remote)(cremote)
+			*cptr = remote.ptr
+		} else if err == ErrOk && remote == nil {
+			panic("no remote created by callback")
+		}
+
+		return C.int(err)
+	} else {
+		panic("invalid remote create callback")
+	}
+}
+
 func populateCloneOptions(ptr *C.git_clone_options, opts *CloneOptions) {
 	C.git_clone_init_options(ptr, C.GIT_CLONE_OPTIONS_VERSION)
 
@@ -59,12 +88,23 @@ func populateCloneOptions(ptr *C.git_clone_options, opts *CloneOptions) {
 	ptr.bare = cbool(opts.Bare)
 
 	if opts.RemoteCreateCallback != nil {
-		ptr.remote_cb = opts.RemoteCreateCallback
-		defer C.free(unsafe.Pointer(opts.RemoteCreateCallback))
-
-		if opts.RemoteCreatePayload != nil {
-			ptr.remote_cb_payload = opts.RemoteCreatePayload
-			defer C.free(opts.RemoteCreatePayload)
-		}
+		// Go v1.1 does not allow to assign a C function pointer
+		C._go_git_populate_remote_cb(ptr)
+		ptr.remote_cb_payload = pointerHandles.Track(*opts)
 	}
 }
+
+func freeCloneOptions(ptr *C.git_clone_options) {
+	if ptr == nil {
+		return
+	}
+
+	freeCheckoutOpts(&ptr.checkout_opts)
+
+	if ptr.remote_cb_payload != nil {
+		pointerHandles.Untrack(ptr.remote_cb_payload)
+	}
+
+	C.free(unsafe.Pointer(ptr.checkout_branch))
+	C.free(unsafe.Pointer(ptr))
+}
diff --git a/clone_test.go b/clone_test.go
index 7cdc362..a6bbf94 100644
--- a/clone_test.go
+++ b/clone_test.go
@@ -5,8 +5,11 @@ import (
 	"testing"
 )
 
-func TestClone(t *testing.T) {
+const (
+	REMOTENAME = "testremote"
+)
 
+func TestClone(t *testing.T) {
 	repo := createTestRepo(t)
 	defer cleanupTestRepo(t, repo)
 
@@ -30,3 +33,43 @@ func TestClone(t *testing.T) {
 		t.Fatal("reference in clone does not match original ref")
 	}
 }
+
+func TestCloneWithCallback(t *testing.T) {
+	testPayload := 0
+
+	repo := createTestRepo(t)
+	defer cleanupTestRepo(t, repo)
+
+	seedTestRepo(t, repo)
+
+	path, err := ioutil.TempDir("", "git2go")
+	checkFatal(t, err)
+
+	opts := CloneOptions{
+		Bare: true,
+		RemoteCreateCallback: func(r *Repository, name, url string) (*Remote, ErrorCode) {
+			testPayload += 1
+
+			remote, err := r.Remotes.Create(REMOTENAME, url)
+			if err != nil {
+				return nil, ErrGeneric
+			}
+
+			return remote, ErrOk
+		},
+	}
+
+	repo2, err := Clone(repo.Path(), path, &opts)
+	defer cleanupTestRepo(t, repo2)
+
+	checkFatal(t, err)
+
+	if testPayload != 1 {
+		t.Fatal("Payload's value has not been changed")
+	}
+
+	remote, err := repo2.Remotes.Lookup(REMOTENAME)
+	if err != nil || remote == nil {
+		t.Fatal("Remote was not created properly")
+	}
+}
diff --git a/merge.go b/merge.go
index f1a6f40..a52e8f8 100644
--- a/merge.go
+++ b/merge.go
@@ -394,6 +394,7 @@ func MergeFile(ancestor MergeFileInput, ours MergeFileInput, theirs MergeFileInp
 			return nil, MakeGitError(ecode)
 		}
 		populateCMergeFileOptions(copts, *options)
+		defer freeCMergeFileOptions(copts)
 	}
 
 	runtime.LockOSThread()
diff --git a/script/install-libgit2.sh b/script/install-libgit2.sh
index a6c3202..9bf6b37 100755
--- a/script/install-libgit2.sh
+++ b/script/install-libgit2.sh
@@ -13,9 +13,9 @@ if [ "x$TRAVIS_BRANCH" = "xnext" ]; then
 fi
 
 cd "${HOME}"
-wget -O libgit2-0.22.3.tar.gz https://github.com/libgit2/libgit2/archive/v0.22.1.tar.gz
-tar -xzvf libgit2-0.22.3.tar.gz
-cd libgit2-0.22.1 && mkdir build && cd build
+wget -O libgit2-0.23.1.tar.gz https://github.com/libgit2/libgit2/archive/v0.23.1.tar.gz
+tar -xzvf libgit2-0.23.1.tar.gz
+cd libgit2-0.23.1 && mkdir build && cd build
 cmake -DTHREADSAFE=ON -DBUILD_CLAR=OFF -DCMAKE_BUILD_TYPE="RelWithDebInfo" .. && make && sudo make install
 sudo ldconfig
 cd "${TRAVIS_BUILD_DIR}"
diff --git a/status.go b/status.go
index 3f5a06d..068a474 100644
--- a/status.go
+++ b/status.go
@@ -126,34 +126,24 @@ type StatusOptions struct {
 	Pathspec []string
 }
 
-func (opts *StatusOptions) toC() *C.git_status_options {
-	if opts == nil {
-		return nil
-	}
-
-	cpathspec := C.git_strarray{}
-	if opts.Pathspec != nil {
-		cpathspec.count = C.size_t(len(opts.Pathspec))
-		cpathspec.strings = makeCStringsFromStrings(opts.Pathspec)
-		defer freeStrarray(&cpathspec)
-	}
-
-	copts := &C.git_status_options{
-		version:  C.GIT_STATUS_OPTIONS_VERSION,
-		show:     C.git_status_show_t(opts.Show),
-		flags:    C.uint(opts.Flags),
-		pathspec: cpathspec,
-	}
-
-	return copts
-}
-
 func (v *Repository) StatusList(opts *StatusOptions) (*StatusList, error) {
 	var ptr *C.git_status_list
 	var copts *C.git_status_options
 
 	if opts != nil {
-		copts = opts.toC()
+		cpathspec := C.git_strarray{}
+		if opts.Pathspec != nil {
+			cpathspec.count = C.size_t(len(opts.Pathspec))
+			cpathspec.strings = makeCStringsFromStrings(opts.Pathspec)
+			defer freeStrarray(&cpathspec)
+		}
+
+		copts = &C.git_status_options{
+			version:  C.GIT_STATUS_OPTIONS_VERSION,
+			show:     C.git_status_show_t(opts.Show),
+			flags:    C.uint(opts.Flags),
+			pathspec: cpathspec,
+		}
 	} else {
 		copts = &C.git_status_options{}
 		ret := C.git_status_init_options(copts, C.GIT_STATUS_OPTIONS_VERSION)
diff --git a/walk.go b/walk.go
index d02044a..c314f60 100644
--- a/walk.go
+++ b/walk.go
@@ -173,6 +173,10 @@ func (v *RevWalk) Iterate(fun RevWalkIterator) (err error) {
 			return nil
 		}
 		if err != nil {
+			if err.(GitError).Code == ErrIterOver {
+				err = nil
+			}
+
 			return err
 		}
 
diff --git a/wrapper.c b/wrapper.c
index 1efe5d7..2b1a180 100644
--- a/wrapper.c
+++ b/wrapper.c
@@ -5,6 +5,11 @@
 
 typedef int (*gogit_submodule_cbk)(git_submodule *sm, const char *name, void *payload);
 
+void _go_git_populate_remote_cb(git_clone_options *opts)
+{
+	opts->remote_cb = (git_remote_create_cb)remoteCreateCallback;
+}
+
 int _go_git_visit_submodule(git_repository *repo, void *fct)
 {
 	  return git_submodule_foreach(repo, (gogit_submodule_cbk)&SubmoduleVisitor, fct);