pahole v1.18 introduced a bug that hangs a product-line build

pahole v1.18 introduced a bug that hangs a product-line build

[Joe Flowers]

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Hello,

We have a product build that hangs at the same place every time because of
a change introduced in pahole.c v1.18. The hang occurs in all versions of
pahole.c since, including the latest. We are using Ubuntu 22.04.3 for
builds.

The attached file
"modified-v1.17-pahole.c-that-works-with-dwarves-v1.18-and-EMCMFirmware-builds_Nov-22-2023-04.tar.bz2"
contains pahole.c v1.17 that has been merged with as many pahole.c v1.18
changes as I could so far and still successfully build our product.

If you diff between that modified v1.17 pahole.c and a pristine unchanged
v1.18 pahole.c file, the bug introduction is somewhere in that difference.

I have attached the file "pahole.c-v1.18-pristine-original-unchanged.rar"
for convenience.

Please help me find the root cause of this hang and a fix for pahole or a
workaround for all future versions of pahole.

Thank you!

Joe

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