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Maniphest T87659

Crash when creating reroute loop in geometry nodes
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Description

System Information
Operating system: Windows-10-10.0.19041-SP0 64 Bits
Graphics card: GeForce RTX 2070/PCIe/SSE2 NVIDIA Corporation 4.5.0 NVIDIA 457.63

Blender Version
Broken: version: 2.93.0 Beta, branch: master, commit date: 2021-04-19 20:39, hash: rB0566ebdebeeb
Worked: (newest version of Blender that worked as expected)

Short description of error
When a reroute loop is created in geometry nodes, I.e. connecting a reroute to another reroute that connects to it through any number of reroutes, blender crashes. In shader nodes, this is not a problem, as the new wire is turned red with no effect. This seems to happen with any number of reroutes, even 2.
Exact steps for others to reproduce the error
(from the default startup)

  1. Open blender
  2. Open a geometry nodes editor
  3. Create 2 reroutes
  4. Connect the first one to the second one
  5. Connect the second one to the first one

Revisions and Commits

rB Blender
rBb1fcc8e6ba25 Fix T87659: crash when creating reroute loop in geometry nodes

Related Objects

Event Timeline

Charles Weaver (Zorro_weaver) created this task.Apr 20 2021, 5:58 PM
Charles Weaver (Zorro_weaver) updated the task description. (Show Details)
Philipp Oeser (lichtwerk) changed the task status from Needs Triage to Confirmed.Apr 21 2021, 2:50 PM
Philipp Oeser (lichtwerk) claimed this task.
Philipp Oeser (lichtwerk) added projects: Nodes & Physics, Geometry Nodes.
Philipp Oeser (lichtwerk) added a subscriber: Philipp Oeser (lichtwerk).

Can confirm, will check.

Philipp Oeser (lichtwerk) changed the subtype of this task from "Report" to "Bug".Apr 21 2021, 2:50 PM
Philipp Oeser (lichtwerk) removed Philipp Oeser (lichtwerk) as the assignee of this task.Apr 21 2021, 3:38 PM
Philipp Oeser (lichtwerk) triaged this task as High priority.
Philipp Oeser (lichtwerk) added a subscriber: Jacques Lucke (JacquesLucke).

Caused by rB0ff3f96a1b01: Nodes: make derived link data more obvious in NodeTreeRef

Seems to hang infinitely in blender::nodes::InputSocketRef::foreach_logical_origin.
Seems quicker if @Jacques Lucke (JacquesLucke) has a look.
Will set to High prio since it is a regression, crashes and we have the culprit commit.

Jacques Lucke (JacquesLucke) claimed this task.Apr 21 2021, 4:00 PM
Jacques Lucke (JacquesLucke) closed this task as Resolved by committing rBb1fcc8e6ba25: Fix T87659: crash when creating reroute loop in geometry nodes.Apr 21 2021, 4:22 PM
Jacques Lucke (JacquesLucke) added a commit: rBb1fcc8e6ba25: Fix T87659: crash when creating reroute loop in geometry nodes.