synced to 1.2

diff --git a/ginac/basic.cpp b/ginac/basic.cpp
index 5b57c2fd875e5c6bcbe10a4a048f8bedc98eee6a..bd19ab59d218ca94af5be69694147275d0d7ac79 100644 (file)
--- a/ginac/basic.cpp
+++ b/ginac/basic.cpp
@@ -708,7 +708,7 @@ ex basic::expand(unsigned options) const
 ex basic::subs(const ex & e, unsigned options) const
 {
        if (e.info(info_flags::relation_equal)) {
-               return subs(lst(e), options);
+               return subs(lst(e.lhs()), lst(e.rhs()), options);
        }
        if (!e.info(info_flags::list)) {
                throw(std::invalid_argument("basic::subs(ex): argument must be a list"));