diff options
Diffstat (limited to 'gowin/pack.cc')
-rw-r--r-- | gowin/pack.cc | 8 |
1 files changed, 5 insertions, 3 deletions
diff --git a/gowin/pack.cc b/gowin/pack.cc index 4adfec1a..83820142 100644 --- a/gowin/pack.cc +++ b/gowin/pack.cc @@ -947,9 +947,11 @@ static void pack_io(Context *ctx) if (constr_bel != ci->attrs.end()) { constr_bel_name = constr_bel->second.as_string(); } - constr_bel = iob->attrs.find(id_BEL); - if (constr_bel != iob->attrs.end()) { - constr_bel_name = constr_bel->second.as_string(); + if (iob != nullptr) { + constr_bel = iob->attrs.find(id_BEL); + if (constr_bel != iob->attrs.end()) { + constr_bel_name = constr_bel->second.as_string(); + } } if (!constr_bel_name.empty()) { BelId constr_bel = ctx->getBelByNameStr(constr_bel_name); |