0031426: Modeling Algorithms - out of range within HLRBRep_PolyAlgo

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0031426

Open CASCADE

[OCCT] OCCT:Modeling Algorithms

public

2020-03-11 20:58

2020-09-15 12:10

Reporter

kgv

Assigned To

msv

Priority

normal

Severity

minor

Status

new

Resolution

open

Platform

OS Version

Product Version

[OCCT] 7.4.0

Target Version

[OCCT] 7.6.0*

Fixed in Version

Summary

0031426: Modeling Algorithms - out of range within HLRBRep_PolyAlgo

Description

Test case hlr/poly_hlr/bug23625_1 crashes on regerenated triangulation with out of range exception. Probably range checks are missing within HLRBRep_PolyAlgo and it might be BRepMesh generating broken Poly_PolygonOnTriangulation.

Steps To Reproduce

test hlr poly_hlr bug23625_1 1
vclear
tclean a
incmesh a 7.6 12
vdisplay a
vcomputehlr a result -algoType polyAlgo

Result:

** Exception ** 000001D93DB39C30 : OSD_Exception_ACCESS_VIOLATION: ACCESS VIOLATION at address 0x000001D8551439B8 
during 'READ' operation

Within debugger at line

> const Handle(HLRAlgo_PolyInternalNode)* pi1p2 =
      &(((HLRAlgo_Array1OfPINod*)PINod1)->ChangeValue(Pol1(nbPol)));

HPol[0] has size 3 and HPol[1] has size 2.

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Issue History
Date Modified	Username	Field	Change
2020-03-11 20:58	kgv	New Issue
2020-03-11 20:58	kgv	Assigned To	=> msv
2020-03-11 21:05	kgv	Relationship added	related to 0023625
2020-03-11 21:05	kgv	Relationship added	related to 0031425
2020-09-15 12:10	msv	Target Version	7.5.0 => 7.6.0*