MonetDB: default - Protect against illegal arguments

[Martin Kersten]

Changeset: d836e99a3264 for MonetDB
URL: http://dev.monetdb.org/hg/MonetDB?cmd=changeset;node=d836e99a3264
Modified Files:
        monetdb5/mal/mal_instruction.mx
Branch: default
Log Message:

Protect against illegal arguments


diffs (18 lines):

diff --git a/monetdb5/mal/mal_instruction.mx b/monetdb5/mal/mal_instruction.mx
--- a/monetdb5/mal/mal_instruction.mx
+++ b/monetdb5/mal/mal_instruction.mx
@@ -2854,11 +2854,12 @@ static VarRecord varTrue;
 VarPtr
 varGetProp( MalBlkPtr mb, int var, int prop )
 {
-       VarPtr v = getVar(mb, var);
+       VarPtr v;
        int i;
 
-       if ( mb->prps == NULL)
+       if ( mb->prps == NULL || var < 0)
                return NULL;
+       v = getVar(mb, var);
        for(i=0; i<v->propc; i++){
                MalProp *p = mb->prps+v->prps[i];
 
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