[BUGFIX] Fix crash in parser.

[ginac.git] / ginac / inifcns_nstdsums.cpp

diff --git a/ginac/inifcns_nstdsums.cpp b/ginac/inifcns_nstdsums.cpp
index c6f5012afbab8da2305854cec7094d340b8540a9..e69cdb4014612f9cdbacc8389a4b17db244c7890 100644 (file)
--- a/ginac/inifcns_nstdsums.cpp
+++ b/ginac/inifcns_nstdsums.cpp
@@ -47,7 +47,7 @@
  */
 
 /*
- *  GiNaC Copyright (C) 1999-2021 Johannes Gutenberg University Mainz, Germany
+ *  GiNaC Copyright (C) 1999-2024 Johannes Gutenberg University Mainz, Germany
  *
  *  This program is free software; you can redistribute it and/or modify
  *  it under the terms of the GNU General Public License as published by
@@ -3318,7 +3318,9 @@ static ex H_evalf(const ex& x1, const ex& x2)
                        // x -> 1-x
                        if (has_minus_one) {
                                map_trafo_H_convert_to_Li filter;
-                               return filter(H(m, numeric(x)).hold()).evalf();
+                                // 09.06.2021: bug fix: don't forget a possible minus sign from the case realpart(x) < 0
+                               res *= filter(H(m, numeric(x)).hold()).evalf();
+                               return res;
                        }
                        map_trafo_H_1mx trafo;
                        res *= trafo(H(m, xtemp).hold());