MonetDB: Jul2017 - fix crash on missing function

[Niels Nes]

Changeset: 7ab8e760fd94 for MonetDB
URL: https://dev.monetdb.org/hg/MonetDB?cmd=changeset;node=7ab8e760fd94
Modified Files:
        sql/server/rel_dump.c
Branch: Jul2017
Log Message:

fix crash on missing function


diffs (13 lines):

diff --git a/sql/server/rel_dump.c b/sql/server/rel_dump.c
--- a/sql/server/rel_dump.c
+++ b/sql/server/rel_dump.c
@@ -904,7 +904,8 @@ exp_read(mvc *sql, sql_rel *lrel, sql_re
                        for( n = exps->h; n; n = n->next)
                                append(ops, exp_subtype(n->data));
                        f = sql_bind_func_(sql->sa, s, cname, ops, F_FUNC);
-                       exp = exp_op( sql->sa, exps, f);
+                       if (f)
+                               exp = exp_op( sql->sa, exps, f);
                }
        }
 
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