BUG: IOobject: interpretation of ./ in construct-from-fileName. Fixes #482.

src/OpenFOAM/db/IOobject/IOobject.C

@@ -121,12 +121,16 @@ static inline bool isOutsideOfCase(const std::string& file)
 //    "/xxx/yyy/bar"      ("/xxx/yyy", "", "bar")
 bool Foam::IOobject::fileNameComponents
 (
-    const fileName& path,
+    const fileName& rawPath,
     fileName& instance,
     fileName& local,
     word& name
 )
 {
+    // Re-interpret the path as a file-system path.
+    fileName path(rawPath);
+    path.toAbsolute();
+
     instance.clear();
     local.clear();
     name.clear();

src/OpenFOAM/db/IOobject/IOobject.H

@@ -239,8 +239,10 @@ public:
             bool globalObject = false
         );
 
-        //- Construct from path, registry, io options
-        //  Uses fileNameComponents() to split path into components.
+        //- Construct from path, registry, io options.
+        //  Uses fileNameComponents() to split path into components. The
+        //  path argument is regarded as a file system path, not a case-relative
+        //  path. Any './' gets expanded to the current working directory.
         IOobject
         (
             const fileName& path,