On macOS, I am often getting this when building Emacs from scratch (I've
also attached my full build log). Could this be a race condition with a
parallel build?

In toplevel form:
org/org-element.el:64:2: Error: Eager macro-expansion failure:
(native-compiler-error (lambda (arg322 &optional arg323) (let ((f
#'macroexpand)) (funcall f arg322 arg323))) "Compiling
/private/var/tmp/emacs-plusA30-20231227-
10652-1cz0rs/.brew_home/.emacs.d/eln-cache/30.0.50-69afc345/subr--trampoline-6d6163726f657870616e64_macroexpand_0.eln...
File already exists:
/private/var/tmp/emacs-plusA30-20231227-10652-1cz0rs/.brew_home/.emacs.d/eln-cache/30.0.50-69afc345/subr--trampoline-6d6163726f657870616e64_macroexpand_0.eln

Error: file-already-exists (\"File already exists\"
\"/private/var/tmp/emacs-plusA30-20231227-10652-1cz0rs/.brew_home/.emacs.d/eln-cache/30.0.50-69afc345/subr--trampoline-6d6163726f657870616e64_macroexpand_0.eln\")
  mapbacktrace(#f(compiled-function (evald func args flags) #<bytecode
-0x1fcb3a734512f81>))
  debug-early-backtrace()
  debug-early(error (file-already-exists \"File already exists\"
\"/private/var/tmp/emacs-plusA30-20231227-10652-1cz0rs/.brew_home/.emacs.d/eln-cache/30.0.50-69afc345/subr--trampoline-6d6163726f657870616e64_macroexpand_0.eln
\"))

rename-file(\"/private/var/tmp/emacs-plusA30-20231227-10652-1cz0rs/.brew_home/.emacs.d/eln-cache/30.0.50-69afc345/subr--trampoline-6d6163726f657870616e64_macroexpand_08i0tl8.eln.tmp\"
\"/private/var/tmp/emacs-plusA30-20231
227-10652-1cz0rs/.brew_home/.emacs.d/eln-cache/30.0.50-69afc345/subr--trampoline-6d6163726f657870616e64_macroexpand_0.eln\")

comp-delete-or-replace-file(\"/private/var/tmp/emacs-plusA30-20231227-10652-1cz0rs/.brew_home/.emacs.d/eln-cache/30.0.50-69afc345/subr--trampoline-6d6163726f657870616e64_macroexpand_0.eln\"
\"/private/var/tmp/emacs-plusA30
-20231227-10652-1cz0rs/.brew_home/.emacs.d/eln-cache/30.0.50-69afc345/subr--trampoline-6d6163726f657870616e64_macroexpand_08i0tl8.eln.tmp\")

comp--compile-ctxt-to-file(\"/private/var/tmp/emacs-plusA30-20231227-10652-1cz0rs/.brew_home/.emacs.d/eln-cache/30.0.50-69afc345/subr--trampoline-6d6163726f657870616e64_macroexpand_0.eln\")

comp-compile-ctxt-to-file(\"/private/var/tmp/emacs-plusA30-20231227-10652-1cz0rs/.brew_home/.emacs.d/eln-cache/30.0.50-69afc345/subr--trampoline-6d6163726f657870616e64_macroexpand_0.eln\")
  comp-final1()

load-with-code-conversion(\"/private/var/tmp/emacs-int-comp-subr--trampoline-6d6163726f657870616e64_macroexpand_0-haajZW.el\"
\"/private/var/tmp/emacs-int-comp-subr--trampoline-6d6163726f657870616e64_macroexpand_0-haajZW.e
l\" nil t)
  command-line-1((\"-l\"
\"/private/var/tmp/emacs-int-comp-subr--trampoline-6d6163726f657870616e64_macroexpand_0-haajZW.el\"))
  command-line()
  normal-top-level()
")
gmake[3]: *** [Makefile:330: org/org-element.elc] Error 1




I can reproduce this consistently when building with homebrew, but
it's more intermittent when building from the git repo.




Aaron