--- autoconf-2.69/tests/m4sh.at.orig	2012-03-07 18:35:26.000000000 +0100
+++ autoconf-2.69/tests/m4sh.at	2017-01-31 21:50:56.350739217 +0100
@@ -237,7 +237,7 @@
 [[AS@&t@_INIT
 m4@&t@_divert_text([], [
 if $2; then
-  AS@&t@_UNSET([LINENO])
+  { LINENO=0; unset LINENO;}
 fi
 ])
 AS@&t@_LINENO_PREPARE