--- gforth/blocks.fs	2008/07/15 16:11:49	1.55
+++ gforth/blocks.fs	2011/01/19 19:00:45	1.56
@@ -224,9 +224,10 @@ User scr ( -- a-addr ) \ block-ext s-c-r
 Create block-input   A, A, A, A, A,
 
 : load  ( i*x n -- j*x ) \ block
-    \G Save the current input source specification. Store @i{n} in
-    \G @code{BLK}, set @code{>IN} to 0 and interpret. When the parse
-    \G area is exhausted, restore the input source specification.
+\G Save the current input source specification. Store @i{n} in
+\G @code{BLK}, set @code{>IN} to 0 and interpret. When the parse
+\G area is exhausted, restore the input source specification.
+    dup 0= -35 and throw
     block-input 0 new-tib dup loadline ! blk !  s" * a block*" loadfilename 2!
     ['] interpret catch pop-file throw ;
 [ELSE]
@@ -244,6 +245,7 @@ Create block-input   A, A, A, A, A,
     \G Save the current input source specification. Store @i{n} in
     \G @code{BLK}, set @code{>IN} to 0 and interpret. When the parse
     \G area is exhausted, restore the input source specification.
+    dup 0= -35 and throw
     s" * a block*" loadfilename>r
     push-file
     dup loadline ! blk ! >in off ['] interpret catch