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Assertion failed '((tree->gtDebugFlags & GTF_DEBUG_NODE_MORPHED) == 0) && "ERROR: Already morphed this node!"' #56962
Description
COMPlus_JitSkipArrayBoundCheck=1
Gets following error during startup:
Assert failure(PID 26952 [0x00006948], Thread: 30492 [0x771c]): Assertion failed '((tree->gtDebugFlags & GTF_DEBUG_NODE_MORPHED) == 0) && "ERROR: Already morphed this node!"' in 'System.Runtime.CompilerServices.CastHelpers:StelemRef(System.Array,int,System.Object)' during 'Morph - Global' (IL size 86)
File: D:\git\runtime\src\coreclr\jit\morph.cpp Line: 15216
Image: D:\git\runtime\artifacts\tests\coreclr\windows.x64.Checked\tests\Core_Root\CoreRun.exe
category:correctness
theme:bounds-checks
skill-level:beginner
cost:small
impact:small
Activity
kunalspathak commentedon Aug 6, 2021
@dotnet/jit-contrib
JulieLeeMSFT commentedon Aug 6, 2021
@echesakov PTAL.
echesakov commentedon Aug 6, 2021
I will take a look.
echesakov commentedon Aug 13, 2021
I have been looking into this issue for a while and I don't think we can end up at this assert other than by setting
COMPlus_JitSkipArrayBoundCheck=1.I still think we should fix the broken invariant (it's not clear how though), so I propose to move the issue to 7.0.0.
@dotnet/jit-contrib Any objections?
kunalspathak commentedon Aug 13, 2021
Sounds good to me and that is the reason I marked it as Pri3.
echesakov commentedon Mar 15, 2022
Un-assigning myself
cc @BruceForstall
JIT: revise how we track if nodes have been morphed
JIT: revise how we track if nodes have been morphed (#110787)
AndyAyersMS commentedon Jun 6, 2025
Fixed by #110787