BZ 1848995 - Intermittent pminfo crashes (core dumps)
51bb36a84 libpcp: minor clarification to previous fix to use __pmHashInit
d0df00ad1 derive_parser.y.in: fix of incomplete initialization of __pmHashCtl struct for F_REGEX node

diff --git a/src/libpcp/src/derive_parser.y.in b/src/libpcp/src/derive_parser.y.in
index 9ed375e01..6756daa77 100644
--- a/src/libpcp/src/derive_parser.y.in
+++ b/src/libpcp/src/derive_parser.y.in
@@ -2598,6 +2598,8 @@ regexpr	: opt_bang L_PATTERN
 		      return -1;
 		  }
 		  np->data.pattern->invert = $1;
+		  np->data.pattern->used = 0;
+		  __pmHashInit(&np->data.pattern->hash);
 		  $$ = np;
 		}