listamsb: tell user where unexpected EOF happened.

1 files changed, 2 insertions, 1 deletions

diff --git a/listamsb.c b/listamsb.c
index 8e7d7ea..36e1ac2 100644
--- a/listamsb.c
+++ b/listamsb.c
@@ -186,7 +186,8 @@ unsigned char read_byte(void) {
 
 	c = fgetc(infile);
 
-	if(c < 0) die("unexpected EOF, file truncated?");
+	if(c < 0) die("unexpected EOF in %s (byte %d), file truncated?",
+			(header_read ? "program" : "header"), bytes_read);
 
 	bytes_read++;
 	return (unsigned char)c;