Bug 1654593

Recently I found lftp crashing in binary build by me so I've been trying to check generated core file:

[root@domek coredump]# gdb -c core.lftp.1000.a541c9601bb747ea906170a1934b8dde.10037.1543472771000000 
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[New LWP 10037]
Reading symbols from /usr/bin/lftp...
Reading symbols from /usr/lib/debug/usr/bin/lftp-4.8.4-2.fc30.x86_64.debug...
../../gdb/dwarf2read.c:9818: internal-error: void dw2_add_symbol_to_list(symbol*, pending**): Assertion `(*listhead) == NULL || (SYMBOL_LANGUAGE ((*listhead)->symbol[0]) == SYMBOL_LANGUAGE (symbol))' failed.
A problem internal to GDB has been detected,
further debugging may prove unreliable.
Quit this debugging session? (y or n) n

This is a bug, please report it.  For instructions, see:
<http://www.gnu.org/software/gdb/bugs/>.

../../gdb/dwarf2read.c:9818: internal-error: void dw2_add_symbol_to_list(symbol*, pending**): Assertion `(*listhead) == NULL || (SYMBOL_LANGUAGE ((*listhead)->symbol[0]) == SYMBOL_LANGUAGE (symbol))' failed.
A problem internal to GDB has been detected,
further debugging may prove unreliable.
Create a core file of GDB? (y or n) n
Command aborted.
warning: Unexpected size of section `.reg-xstate/10037' in core file.
(gdb) bt
#0  0x00007efe5b82653f in ?? ()
#1  0x0000000000010000 in ?? ()
#2  0x00005643e6295ac0 in ?? ()
#3  0x00007efe5b9afd80 in ?? ()
#4  0x00007efe5b868927 in ?? ()
#5  0x00007ffcfbad8000 in ?? ()
#6  0x00005643e6295ac0 in ?? ()
#7  0x00005643e6295b25 in ?? ()
#8  0x00005643e6295ac0 in ?? ()
#9  0x00005643e6295ac0 in ?? ()
#10 0x00005643e6295b36 in ?? ()
#11 0x00005643e6295bec in ?? ()
#12 0x00005643e6295ac0 in ?? ()
#13 0x00005643e6295bec in ?? ()
#14 0x0000000000000000 in ?? ()
(gdb)