From ddce3738b1cfd4f54efd2b01bf4d3971929d1669 Mon Sep 17 00:00:00 2001
From: Krasimir Angelov <kr.angelov@gmail.com>
Date: Tue, 18 Nov 2025 09:27:10 +0100
Subject: [PATCH] fix how probabilities are computed

---
 src/runtime/c/pgf/parser.cxx | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/src/runtime/c/pgf/parser.cxx b/src/runtime/c/pgf/parser.cxx
index f1383f5a3..45f9c78b9 100644
--- a/src/runtime/c/pgf/parser.cxx
+++ b/src/runtime/c/pgf/parser.cxx
@@ -1009,7 +1009,7 @@ PgfExpr PgfParser::process_expr(ExprState *estate, prob_t *prob)
         for (ExprState *parent : estate->res->pending) {
             ExprState *app_state = new(parent->n_args) ExprState;
             app_state->expr  = parent->expr ? u->eapp(parent->expr, estate->expr) : estate->expr;
-            app_state->prob  = parent->prob+estate->prob;
+            app_state->prob  = parent->prob+prob;
             app_state->hash  = parent->hash * 31 + estate->hash;
             app_state->res   = parent->res;
             app_state->index = parent->index+1;