patch 7.4.1576

Problem:    Write error of viminfo file is not handled properly. (Christian
            Neukirchen)
Solution:   Check the return value of fclose(). (closes #682)

Author: brammool

src/ex_cmds.c

@@ -2065,26 +2065,30 @@ write_viminfo(char_u *file, int forceit)
     viminfo_errcnt = 0;
     do_viminfo(fp_in, fp_out, forceit ? 0 : (VIF_WANT_INFO | VIF_WANT_MARKS));
 
-    fclose(fp_out);	    /* errors are ignored !? */
+    if (fclose(fp_out) == EOF)
+	++viminfo_errcnt;
+
     if (fp_in != NULL)
     {
 	fclose(fp_in);
 
 	/* In case of an error keep the original viminfo file.  Otherwise
 	 * rename the newly written file.  Give an error if that fails. */
-	if (viminfo_errcnt == 0 && vim_rename(tempname, fname) == -1)
+	if (viminfo_errcnt == 0)
 	{
-	    ++viminfo_errcnt;
-	    EMSG2(_("E886: Can't rename viminfo file to %s!"), fname);
+	    if (vim_rename(tempname, fname) == -1)
+	    {
+		++viminfo_errcnt;
+		EMSG2(_("E886: Can't rename viminfo file to %s!"), fname);
+	    }
+# ifdef WIN3264
+	    /* If the viminfo file was hidden then also hide the new file. */
+	    else if (hidden)
+		mch_hide(fname);
+# endif
 	}
 	if (viminfo_errcnt > 0)
 	    mch_remove(tempname);
-
-#ifdef WIN3264
-	/* If the viminfo file was hidden then also hide the new file. */
-	if (hidden)
-	    mch_hide(fname);
-#endif
     }
 
 end:

src/version.c

@@ -743,6 +743,8 @@ static char *(features[]) =
 
 static int included_patches[] =
 {   /* Add new patch number below this line */
+/**/
+    1576,
 /**/
     1575,
 /**/