[Bug rtl-optimization/90282] internal compiler error: qsort checking failed in snapshot-20190429

[glaubitz at physik dot fu-berlin.de]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=90282

--- Comment #3 from John Paul Adrian Glaubitz <glaubitz at physik dot fu-berlin.de> ---
This problem is still present in r278870:

../../src/gcc/ubsan.c: In function 'tree_node* ubsan_type_descriptor(tree,
ubsan_print_style)':
../../src/gcc/ubsan.c:409:33: warning: unterminated quote character ''' in
format [-Wformat-diag]
  409 |       pp_printf (&pretty_name, "'%s%s%s%s%s%s%s",
      |                                 ^
../../src/gcc/ubsan.c:428:36: warning: spurious trailing space in format
[-Wformat-diag]
  428 |       pp_printf (&pretty_name, "'%s ", tname);
      |                                    ^
../../src/gcc/ubsan.c:428:33: warning: unterminated quote character ''' in
format [-Wformat-diag]
  428 |       pp_printf (&pretty_name, "'%s ", tname);
      |                                 ^
/<<PKGBUILDDIR>>/build/./prev-gcc/xg++ -B/<<PKGBUILDDIR>>/build/./prev-gcc/
-B/usr/lib/gcc-snapshot/ia64-linux-gnu/bin/ -nostdinc++
-B/<<PKGBUILDDIR>>/build/prev-ia64-linux-gnu/libstdc++-v3/src/.libs
-B/<<PKGBUILDDIR>>/build/prev-ia64-linux-gnu/libstdc++-v3/libsupc++/.libs 
-I/<<PKGBUILDDIR>>/build/prev-ia64-linux-gnu/libstdc++-v3/include/ia64-linux-gnu
 -I/<<PKGBUILDDIR>>/build/prev-ia64-linux-gnu/libstdc++-v3/include 
-I/<<PKGBUILDDIR>>/src/libstdc++-v3/libsupc++
-L/<<PKGBUILDDIR>>/build/prev-ia64-linux-gnu/libstdc++-v3/src/.libs
-L/<<PKGBUILDDIR>>/build/prev-ia64-linux-gnu/libstdc++-v3/libsupc++/.libs
-fno-PIE -c  -DUSE_LIBUNWIND_EXCEPTIONS  -g -O2 -fno-checking -gtoggle -DIN_GCC
    -fno-exceptions -fno-rtti -fasynchronous-unwind-tables -W -Wall
-Wno-narrowing -Wwrite-strings -Wcast-qual -Wmissing-format-attribute
-Woverloaded-virtual -pedantic -Wno-long-long -Wno-variadic-macros
-Wno-overlength-strings -fno-common  -DHAVE_CONFIG_H -I. -I. -I../../src/gcc
-I../../src/gcc/. -I../../src/gcc/../include -I../../src/gcc/../libcpp/include 
-I../../src/gcc/../libdecnumber -I../../src/gcc/../libdecnumber/dpd
-I../libdecnumber -I../../src/gcc/../libbacktrace   -o sancov.o -MT sancov.o
-MMD -MP -MF ./.deps/sancov.TPo ../../src/gcc/sancov.c
/<<PKGBUILDDIR>>/build/./prev-gcc/xg++ -B/<<PKGBUILDDIR>>/build/./prev-gcc/
-B/usr/lib/gcc-snapshot/ia64-linux-gnu/bin/ -nostdinc++
-B/<<PKGBUILDDIR>>/build/prev-ia64-linux-gnu/libstdc++-v3/src/.libs
-B/<<PKGBUILDDIR>>/build/prev-ia64-linux-gnu/libstdc++-v3/libsupc++/.libs 
-I/<<PKGBUILDDIR>>/build/prev-ia64-linux-gnu/libstdc++-v3/include/ia64-linux-gnu
 -I/<<PKGBUILDDIR>>/build/prev-ia64-linux-gnu/libstdc++-v3/include 
-I/<<PKGBUILDDIR>>/src/libstdc++-v3/libsupc++
-L/<<PKGBUILDDIR>>/build/prev-ia64-linux-gnu/libstdc++-v3/src/.libs
-L/<<PKGBUILDDIR>>/build/prev-ia64-linux-gnu/libstdc++-v3/libsupc++/.libs
-fno-PIE -c  -DUSE_LIBUNWIND_EXCEPTIONS  -g -O2 -fno-checking -gtoggle -DIN_GCC
    -fno-exceptions -fno-rtti -fasynchronous-unwind-tables -W -Wall
-Wno-narrowing -Wwrite-strings -Wcast-qual -Wmissing-format-attribute
-Woverloaded-virtual -pedantic -Wno-long-long -Wno-variadic-macros
-Wno-overlength-strings -fno-common  -DHAVE_CONFIG_H -I. -I. -I../../src/gcc
-I../../src/gcc/. -I../../src/gcc/../include -I../../src/gcc/../libcpp/include 
-I../../src/gcc/../libdecnumber -I../../src/gcc/../libdecnumber/dpd
-I../libdecnumber -I../../src/gcc/../libbacktrace   -o tree-call-cdce.o -MT
tree-call-cdce.o -MMD -MP -MF ./.deps/tree-call-cdce.TPo
../../src/gcc/tree-call-cdce.c
/<<PKGBUILDDIR>>/build/./prev-gcc/xg++ -B/<<PKGBUILDDIR>>/build/./prev-gcc/
-B/usr/lib/gcc-snapshot/ia64-linux-gnu/bin/ -nostdinc++
-B/<<PKGBUILDDIR>>/build/prev-ia64-linux-gnu/libstdc++-v3/src/.libs
-B/<<PKGBUILDDIR>>/build/prev-ia64-linux-gnu/libstdc++-v3/libsupc++/.libs 
-I/<<PKGBUILDDIR>>/build/prev-ia64-linux-gnu/libstdc++-v3/include/ia64-linux-gnu
 -I/<<PKGBUILDDIR>>/build/prev-ia64-linux-gnu/libstdc++-v3/include 
-I/<<PKGBUILDDIR>>/src/libstdc++-v3/libsupc++
-L/<<PKGBUILDDIR>>/build/prev-ia64-linux-gnu/libstdc++-v3/src/.libs
-L/<<PKGBUILDDIR>>/build/prev-ia64-linux-gnu/libstdc++-v3/libsupc++/.libs
-fno-PIE -c  -DUSE_LIBUNWIND_EXCEPTIONS  -g -O2 -fno-checking -gtoggle -DIN_GCC
    -fno-exceptions -fno-rtti -fasynchronous-unwind-tables -W -Wall
-Wno-narrowing -Wwrite-strings -Wcast-qual -Wmissing-format-attribute
-Woverloaded-virtual -pedantic -Wno-long-long -Wno-variadic-macros
-Wno-overlength-strings -fno-common  -DHAVE_CONFIG_H -I. -I. -I../../src/gcc
-I../../src/gcc/. -I../../src/gcc/../include -I../../src/gcc/../libcpp/include 
-I../../src/gcc/../libdecnumber -I../../src/gcc/../libdecnumber/dpd
-I../libdecnumber -I../../src/gcc/../libbacktrace   -o tree-cfg.o -MT
tree-cfg.o -MMD -MP -MF ./.deps/tree-cfg.TPo ../../src/gcc/tree-cfg.c
../../src/gcc/tree-call-cdce.c: In function 'void
gen_shrink_wrap_conditions(gcall*, vec<gimple*>, unsigned int*)':
../../src/gcc/tree-call-cdce.c:793:1: error: qsort comparator non-negative on
sorted output: 1
  793 | }
      | ^
during RTL pass: mach
../../src/gcc/tree-call-cdce.c:793:1: internal compiler error: qsort checking
failed
0x40000000044ce41f qsort_chk_error
        ../../src/gcc/vec.c:214
0x40000000044cf3bf qsort_chk(void*, unsigned long, unsigned long, int (*)(void
const*, void const*, void*), void*)
        ../../src/gcc/vec.c:256
0x400000000458daaf gcc_qsort(void*, unsigned long, unsigned long, int (*)(void
const*, void const*))
        ../../src/gcc/sort.cc:270
0x40000000040b72ff ready_sort_real
        ../../src/gcc/haifa-sched.c:3095
0x40000000040b744f ready_sort
        ../../src/gcc/haifa-sched.c:3111
0x40000000040d3b9f schedule_block(basic_block_def**, void*)
        ../../src/gcc/haifa-sched.c:6699
0x400000000431747f schedule_ebb(rtx_insn*, rtx_insn*, bool)
        ../../src/gcc/sched-ebb.c:536
0x40000000043181ef schedule_ebbs()
        ../../src/gcc/sched-ebb.c:655
0x400000000340e94f ia64_reorg
        ../../src/gcc/config/ia64/ia64.c:9854
0x40000000024147ef execute
        ../../src/gcc/reorg.c:3981
Please submit a full bug report,
with preprocessed source if appropriate.
Please include the complete backtrace with any bug report.
See <file:///usr/share/doc/gcc-snapshot/README.Bugs> for instructions.
Preprocessed source stored into /tmp/ccQzjkVp.out file, please attach this to
your bugreport.

Compiler dump can see in Debian's build log:
https://buildd.debian.org/status/fetch.php?pkg=gcc-snapshot&arch=ia64&ver=1%3A20191130-1&stamp=1575698799&raw=0

There have been a few snapshots after the 20190429 one where the problem didn't
show, see: https://buildd.debian.org/status/logs.php?pkg=gcc-snapshot&arch=ia64