MPS: profiler

[Ihor Radchenko]

Hi,

I am playing around with scratch/igc branch for fun, and there is one
crash that I can reproduce quite consistently.

All it takes is (1) compile Emacs without native-compilation support;
(2) open Emacs; (3) M-x profiler-start; (4) run a complex operation.

Steps to reproduce:

1. emacs -Q doc/misc/org.org
2. M-x profiler-start RET cpu RET
3. M-: (org-element-parse-buffer) RET

Without step 2, no crash.

Hope it helps.

-- 
Ihor Radchenko // yantar92,
Org mode contributor,
Learn more about Org mode at <https://orgmode.org/>.
Support Org development at <https://liberapay.com/org-mode>,
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