Fix crash with very long lexemes; from upstream

devel/re2c/Makefile

@@ -1,4 +1,4 @@
-# $OpenBSD: Makefile,v 1.29 2020/02/16 14:44:18 sthen Exp $
+# $OpenBSD: Makefile,v 1.30 2020/04/20 07:30:20 jasper Exp $
 
 COMMENT=	C-based regular expression scanner generator
 
@@ -6,7 +6,7 @@ V=		1.3
 DISTNAME=	re2c-$V
 EXTRACT_SUFX=	.tar.xz
 CATEGORIES=	devel
-REVISION=	0
+REVISION=	1
 
 HOMEPAGE=	https://re2c.org/
 

devel/re2c/patches/patch-src_parse_scanner_cc

@@ -0,0 +1,24 @@
+$OpenBSD: patch-src_parse_scanner_cc,v 1.1 2020/04/20 07:30:20 jasper Exp $
+
+Fix crash with very long lexemes
+https://github.com/skvadrik/re2c/commit/c4603ba5ce229db83a2a4fb93e6d4b4e3ec3776a
+
+Index: src/parse/scanner.cc
+--- src/parse/scanner.cc.orig
++++ src/parse/scanner.cc
+@@ -155,13 +155,14 @@ bool Scanner::fill(size_t need)
+         if (!buf) fatal("out of memory");
+ 
+         memmove(buf, tok, copy);
+-        shift_ptrs_and_fpos(buf - bot);
++        shift_ptrs_and_fpos(buf - tok);
+         delete [] bot;
+         bot = buf;
+ 
+         free = BSIZE - copy;
+     }
+ 
++    DASSERT(lim + free <= bot + BSIZE);
+     if (!read(free)) {
+         eof = lim;
+         memset(lim, 0, YYMAXFILL);