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Handle invalid vector slice base expressions 

The elaboration of the base expression of a vector slice index can fail and
return a nullptr. Currently this results in a nullptr deref. Handle that
case by exiting the function early.

Signed-off-by: Lars-Peter Clausen <lars@metafoo.de>
This commit is contained in:
Lars-Peter Clausen 2023-11-23 09:11:17 -08:00
parent bc119f96a9
commit e7e663056a
1 changed files with 4 additions and 0 deletions
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4
elab_expr.cc
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@ -5994,6 +5994,8 @@ NetExpr* PEIdent::elaborate_expr_net_idx_up_(Design*des, NetScope*scope,
return 0;
NetExpr*base = calculate_up_do_base_(des, scope, need_const);
if (!base)
return nullptr;
// Use the part select width already calculated by test_width().
unsigned long wid = min_width_;
@ -6141,6 +6143,8 @@ NetExpr* PEIdent::elaborate_expr_net_idx_do_(Design*des, NetScope*scope,
return 0;
NetExpr*base = calculate_up_do_base_(des, scope, need_const);
if (!base)
return nullptr;
// Use the part select width already calculated by test_width().
unsigned long wid = min_width_;