updated for version 7.3.637

Problem:    Cannot catch the error caused by a foldopen when there is no fold.
	    (ZyX, Issue 48)
Solution:   Do not break out of the loop early when inside try/catch.
	    (Christian Brabandt) Except when there is a syntax error.

src/ex_docmd.c

@@ -1295,7 +1295,14 @@ do_cmdline(cmdline, fgetline, cookie, flags)
 		&& cstack.cs_trylevel == 0
 #endif
 	    )
-	    && !(did_emsg && used_getline
+	    && !(did_emsg
+#ifdef FEAT_EVAL
+		/* Keep going when inside try/catch, so that the error can be
+		 * dealth with, except when it is a syntax error, it may cause
+		 * the :endtry to be missed. */
+		&& (cstack.cs_trylevel == 0 || did_emsg_syntax)
+#endif
+		&& used_getline
 			    && (getline_equal(fgetline, cookie, getexmodeline)
 			       || getline_equal(fgetline, cookie, getexline)))
 	    && (next_cmdline != NULL
@@ -1305,6 +1312,7 @@ do_cmdline(cmdline, fgetline, cookie, flags)
 			|| (flags & DOCMD_REPEAT)));
 
     vim_free(cmdline_copy);
+    did_emsg_syntax = FALSE;
 #ifdef FEAT_EVAL
     free_cmdlines(&lines_ga);
     ga_clear(&lines_ga);
@@ -2137,6 +2145,7 @@ do_one_cmd(cmdlinep, sourcing,
 	    if (!sourcing)
 		append_command(*cmdlinep);
 	    errormsg = IObuff;
+	    did_emsg_syntax = TRUE;
 	}
 	goto doend;
     }

src/globals.h

@@ -183,6 +183,8 @@ EXTERN int	did_endif INIT(= FALSE);    /* just had ":endif" */
 #endif
 EXTERN int	did_emsg;		    /* set by emsg() when the message
 					       is displayed or thrown */
+EXTERN int	did_emsg_syntax;	    /* did_emsg set because of a
+					       syntax error */
 EXTERN int	called_emsg;		    /* always set by emsg() */
 EXTERN int	ex_exitval INIT(= 0);	    /* exit value for ex mode */
 EXTERN int	emsg_on_display INIT(= FALSE);	/* there is an error message */

src/version.c

@@ -719,6 +719,8 @@ static char *(features[]) =
 
 static int included_patches[] =
 {   /* Add new patch number below this line */
+/**/
+    637,
 /**/
     636,
 /**/