[Bug binutils/26447] New: UBSAN error: gas/expr.c:1936:48:

[mliska at suse dot cz]

https://sourceware.org/bugzilla/show_bug.cgi?id=26447

            Bug ID: 26447
           Summary: UBSAN error: gas/expr.c:1936:48:
           Product: binutils
           Version: 2.34
            Status: UNCONFIRMED
          Severity: normal
          Priority: P2
         Component: binutils
          Assignee: unassigned at sourceware dot org
          Reporter: mliska at suse dot cz
  Target Milestone: ---

The following fails when I build binutils with:
configure --build=x86_64-linux --disable-nls --disable-gdb --disable-gdbserver
--disable-sim --disable-readline --disable-libdecnumber --enable-obsolete
--target=dlx-elf CFLAGS="-g -O2 -fsanitize=address,undefined -Wno-error"
CXXLAGS="-g -O2 -fsanitize=address,undefined -Wno-error" LDFLAGS="-ldl"
Target: dlx-elf
PASS: lhi
Executing on host: sh -c {../as-new    -o tmpdir/load.o
/home/mliska/Programming/binutils/gas/testsuite/gas/dlx/load.s 2>&1}  /dev/null
dump.tmp (timeout = 300)
/home/mliska/Programming/binutils/gas/expr.c:1936:48: runtime error: left shift
of negative value -20

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