--- a/mc-macro.c	Sat Jan 07 13:09:45 2006 +0900
+++ b/mc-macro.c	Sat Jan 07 18:11:53 2006 +0900
@@ -252,6 +252,9 @@
  */
 
 static int next_eof;
+struct cheap *st_cheap, *cheap1;
+//   ST_COMMENT may interfere with other inrement_cheap, so we use
+//   another cheap area.
 
 extern void
 getline(void)
@@ -295,24 +298,30 @@
 	    if (inmode) {
 		int i=0;
 		int c;
-		char *p = cheap->ptr;
+		char *p;
+		// should be done in some init
+		if (!st_cheap) {
+		    st_cheap = cheap1 = new_cheap();
+		}
+
+		p = st_cheap->ptr;
 		sprintf(num,"%d: ",lineno);
 		parse = list3(ST_COMMENT,parse,(int)p);
 		// should contain file name
 		c = 0;
-		while((*cheap->ptr = num[c++])) 
-		    cheap = increment_cheap(cheap,&p);
-		while((c = *cheap->ptr = linebuf[i++])) {
-		    cheap = increment_cheap(cheap,&p);
+		while((*st_cheap->ptr = num[c++])) 
+		    st_cheap = increment_cheap(st_cheap,&p);
+		while((c = *st_cheap->ptr = linebuf[i++])) {
+		    st_cheap = increment_cheap(st_cheap,&p);
 		    if (c=='\n') {
-			*cheap->ptr = 0;
-			cheap = increment_cheap(cheap,&p);
-			p = cheap->ptr;
+			*st_cheap->ptr = 0;
+			st_cheap = increment_cheap(st_cheap,&p);
+			p = st_cheap->ptr;
 			// parse = list3(ST_COMMENT,parse,(int)p);
 			sprintf(num,"%d: ",lineno);
 			c = 0;
 			while((*cheap->ptr = num[c++])) 
-			    cheap = increment_cheap(cheap,&p);
+			    st_cheap = increment_cheap(st_cheap,&p);
 		    }
 		}
 	    }