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From: "rguenth at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug middle-end/106495] [13 Regression] Build fails
 gcc/tree-ssa-threadbackward.cc:22: gcc/vec.h:890:19: error: array subscript
 4294967294 is above array bounds of 'basic_block_def* [1]'
 [-Werror=array-bounds]
Date: Mon, 01 Aug 2022 12:21:41 +0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=3D106495

--- Comment #5 from Richard Biener <rguenth at gcc dot gnu.org> ---
Created attachment 53395
  --> https://gcc.gnu.org/bugzilla/attachment.cgi?id=3D53395&action=3Dedit
preprocessed source, trimmed at tail

preprocessed source for i686-pc-linux-gnu, reproduce with

./cc1plus -fpreprocessed tree-ssa-threadbackward.ii -quiet -dumpbase
tree-ssa-threadbackward.cc -dumpbase-ext .cc -mtune=3Dgeneric -march=3Dpent=
iumpro
-g -gtoggle -O2 -Wextra -Wall -Wno-narrowing -Wwrite-strings -Wcast-qual
-Wsuggest-attribute=3Dformat -Woverloaded-virtual=3D2 -Wpedantic -Wno-long-=
long
-Wno-variadic-macros -Wno-overlength-strings -Werror -version -fno-PIE
-fno-checking -fno-exceptions -fno-rtti -fasynchronous-unwind-tables
-fno-common -o tree-ssa-threadbackward.s=