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-rw-r--r--libbuild2/target.hxx2
1 files changed, 2 insertions, 0 deletions
diff --git a/libbuild2/target.hxx b/libbuild2/target.hxx
index c61f241..76b7158 100644
--- a/libbuild2/target.hxx
+++ b/libbuild2/target.hxx
@@ -249,6 +249,8 @@ namespace build2
// - match to resolve members (resolve_members())
// - match of ad hoc group via one of its ad hoc members
//
+ // Note that the 0 cur_options value is illegal.
+ //
// When it comes to match options specified for group members, the
// semantics differs between explicit and ad hoc groups. For explicit
// groups, the standard semantics described above applies and the group's