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Fix #121248: Crash executing node tool operator without active node #121252

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Pratik Borhade merged 2 commits from PratikPB2123/blender:121248-node-tool-crash into main 2024-05-01 14:48:24 +02:00
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Pratik Borhade commented 2024-04-30 11:09:36 +02:00
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Calling NODE_OT_select_same_type_step when no node is active triggers
the crash.

Calling `NODE_OT_select_same_type_step` when no node is active triggers the crash.
Pratik Borhade added 1 commit 2024-04-30 11:09:44 +02:00
a3967d5003 Fix #121248: Crash executing node tool operator without active node 
Calling `NODE_OT_select_same_type_step` when no node is active triggers
the crash.
Pratik Borhade requested review from Jacques Lucke 2024-04-30 11:09:57 +02:00
Pratik Borhade added the
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Nodes & Physics
 label 2024-04-30 11:10:04 +02:00
Jacques Lucke reviewed 2024-04-30 11:37:40 +02:00
source/blender/editors/space_node/node_select.cc Outdated
@ -1263,6 +1263,10 @@ static int node_select_same_type_step_exec(bContext *C, wmOperator *op)
const bool prev = RNA_boolean_get(op->ptr, "prev");
bNode &active_node = *nodeGetActive(snode->edittree);
if (&active_node == nullptr) {
Jacques Lucke commented 2024-04-30 11:37:40 +02:00
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This is undefined behavior. A reference is always expected to be non-null. You need to check the pointer after nodeGetActive before getting a reference to it.

This is undefined behavior. A reference is always expected to be non-null. You need to check the pointer after `nodeGetActive` before getting a reference to it.
Pratik Borhade commented 2024-04-30 11:57:31 +02:00
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Can we use active_node as pointer here instead of a reference?

Can we use `active_node` as pointer here instead of a reference?
Jacques Lucke commented 2024-04-30 12:17:54 +02:00
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Yeah sure

Yeah sure
Pratik Borhade added 1 commit 2024-04-30 13:08:56 +02:00
Jacques Lucke approved these changes 2024-05-01 14:17:28 +02:00
Pratik Borhade merged commit 3c336c82cc into main 2024-05-01 14:48:24 +02:00
Pratik Borhade deleted branch 121248-node-tool-crash 2024-05-01 14:48:27 +02:00
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Reference: blender/blender#121252
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