- added lst::remove_first() and lst::remove_last()

[ginac.git] / ginac / basic.cpp

diff --git a/ginac/basic.cpp b/ginac/basic.cpp
index 2b1b68b0cf82c193b958c0864df2f652e948a74a..a2e10f715531d286c0d3fef0a0a13a4e5cc8d18a 100644 (file)
--- a/ginac/basic.cpp
+++ b/ginac/basic.cpp
@@ -732,6 +732,7 @@ void basic::ensure_if_modifiable(void) const
 {
        if (this->refcount>1)
                throw(std::runtime_error("cannot modify multiply referenced object"));
+       clearflag(status_flags::hash_calculated);
 }
 
 //////////