.

wcfs/internal/wcfs.cpp

@@ -104,7 +104,7 @@ pair<Conn, error> WCFS::connect(zodb::Tid at) {
 
 // close releases resources associated with wconn.
 //
-// opened fileh and mappings become invalid to use.
+// opened fileh and mappings becomes invalid to use.
 // XXX what happens to file mmappings?
 error _Conn::close() {
     _Conn& wconn = *this;

wcfs/internal/wcfs_misc.cpp

@@ -233,8 +233,8 @@ Contextf::Contextf(const char *format, ...) {
     va_end(argp);
 }
 
-error Contextf::operator() (error err) {
-    Contextf& c = *this;
+error Contextf::operator() (error err) const {
+    const Contextf& c = *this;
 
     if (err == nil)
         return nil;

wcfs/internal/wcfs_misc.h

@@ -169,7 +169,7 @@ class Contextf {
 
 public:
     Contextf(const char *format, ...);
-    error operator() (error);
+    error operator() (error) const;
 };
 
 }