drjit Variable Leak Issue?

[coult099]

Hello,
I am using Mitsuba to render the Cbox scene with llvm-ad-rgb. System configuration:

• Mitsuba 3.5.0
• DrJit 0.4.4
• Python 3.22.6 (virtual environment)
• Mac M2, Sonoma 14.2.1
• LLVM 16 (installed with Homebrew)
• I set DRJIT LLVM path with: export DRJIT_LIBLLVM_PATH="/opt/homebrew/opt/llvm@16/lib/libLLVM.dylib"

I am attempting to run the following lines of code:

import drjit as dr
import mitsuba as mi

mi.set_variant('llvm_ad_rgb')
scene = mi.load_file('./scenes/cbox.xml')
image = mi.render(scene)

but I get the following leak error: jit_shutdown(): detected variable leaks:. Can anyone provide insight as to why this is happening? Full error is copied below:

jit_shutdown(): detected variable leaks:
 - variable r21 is still being referenced! (ref=1, ref_se=0, type=float32, size=95, stmt="<null>", dep=[18, 3, 15, 0])
 - variable r2 is still being referenced! (ref=4, ref_se=0, type=float32, size=95, stmt="?n?6??><?O7???7?#8?7?8???8~?c98??9??':ݘ?:U?;o?;?4?;?
?<j?<!?<???D=??u=?X?=?S?=Ԛ?=B[>?\->2U>8g?>B`?>???>??", dep=[0, 0, 0, 0])
 - variable r10 is still being referenced! (ref=1, ref_se=0, type=float32, size=95, stmt="<null>", dep=[7, 1, 0, 0])
 - variable r8 is still being referenced! (ref=1, ref_se=0, type=float32, size=95, stmt="<null>", dep=[5, 1, 0, 0])
 - variable r1 is still being referenced! (ref=4, ref_se=0, type=float32, size=95, stmt="?9?_s9??9?gB:wN?:ۉ;?;ڬ?;~tj<???<?72=z??=?	>??[>W[?>'1?>?Q?>?4?>h"?>?,?>??>.??>t
                                                                             H>??>???=?\m=?=E?p<.??;RI;_< c?<???=?u?=?x)>?*g>O??>?*?>%??>??'1???-??C??W???j???z??]???A??+???9օ?2U???:p?;?Z??[@?Tt$???
?&S?>Ǻ?>?&?>??_>??(>?7?=???=?@?=??='?=Z??<?�<?<??<?;???;?>;?K;i??:??:d?4:??9?8?9?;v9?8.9?;?8?8?8?;v8?.8?;?7?l?7?Et7,7?O?6F??6P\p6?H)6bp?5??5", dep=[0, 0, 0, 0])
 - variable r9 is still being referenced! (ref=1, ref_se=0, type=float32, size=95, stmt="<null>", dep=[6, 1, 0, 0])
 - variable r20 is still being referenced! (ref=1, ref_se=0, type=float32, size=95, stmt="<null>", dep=[17, 3, 14, 0])
 - variable r6 is still being referenced! (ref=1, ref_se=0, type=float32, size=1, stmt="<value>", dep=[0, 0, 0, 0])
 - variable r12 is still being referenced! (ref=1, ref_se=0, type=float32, size=1, stmt="<value>", dep=[0, 0, 0, 0])
 - variable r7 is still being referenced! (ref=1, ref_se=0, type=float32, size=1, stmt="<value>", dep=[0, 0, 0, 0])
 - (skipping remainder)
jit_shutdown(): 22 variables are still referenced!
jit_malloc_shutdown(): leaked
 - host-async memory: 2 KiB in 4 allocations

[njroussel]

Hi @coult099

You can safely ignore these.

The current Python shutdown procedure is a bit chaotic and is dependent on your environment/configuration. For that reason, the cleanup order of Mitsuba/Dr.Jit variables isn't always correct which leads to leaks.

We're currently working on a newer version which should vastly improve this behavior.

[coult099]

Thank you for the information!