[Issue]: 4090，use ext-tuner-example and default conf will Segmentation fault (core dumped)

[ExiledOfCode]

How is this issue impacting you?

Lower performance than expected

Share Your Debug Logs

Steps to Reproduce the Issue

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NCCL Version

NCCL version 2.29.2+cuda12.4

Your platform details

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Error Message & Behavior

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[ExiledOfCode]

command:./build/all_reduce_perf -b 8 -e 1G -f 2 -c 0 -n 20 -w 5 -G 1 -g 2，will be this wrong.
but ./build/all_reduce_perf -b 8 -e 1G -f 2 -c 0 -n 20 -w 5 -G 0 -g 2 is ok.

[ExiledOfCode]

I'm using intrusive debugging, so why is accessing collCostTable[0][0] causing a crash?

I think is the func has a wrong in **collCostTable，because collCostTable not a array of "new"

[RicoloveFeng]

See #1903

[ExiledOfCode]

thanks