[Bug gdb/21100] New: clang follow-fork-mode child internal-error

["ks132 at yandex dot ru" <sourceware-bugzilla at sourceware dot org>]

https://sourceware.org/bugzilla/show_bug.cgi?id=21100

            Bug ID: 21100
           Summary: clang follow-fork-mode child internal-error
           Product: gdb
           Version: 7.12
            Status: UNCONFIRMED
          Severity: normal
          Priority: P2
         Component: gdb
          Assignee: unassigned at sourceware dot org
          Reporter: ks132 at yandex dot ru
  Target Milestone: ---

[ tmp]$ cat test.cpp
int main(int argc, char *argv[]) {}


[ tmp]$ gdb -n --args /usr/bin/clang-3.8 -v test.cpp -o test.out
GNU gdb (GDB) Fedora 7.12-29.fc25
Copyright (C) 2016 Free Software Foundation, Inc.
License GPLv3+: GNU GPL version 3 or later <http://gnu.org/licenses/gpl.html>
This is free software: you are free to change and redistribute it.
There is NO WARRANTY, to the extent permitted by law.  Type "show copying"
and "show warranty" for details.
This GDB was configured as "x86_64-redhat-linux-gnu".
Type "show configuration" for configuration details.
For bug reporting instructions, please see:
<http://www.gnu.org/software/gdb/bugs/>.
Find the GDB manual and other documentation resources online at:
<http://www.gnu.org/software/gdb/documentation/>.
For help, type "help".
Type "apropos word" to search for commands related to "word"...
Reading symbols from /usr/bin/clang-3.8...Reading symbols from
/usr/bin/clang-3.8...(no debugging symbols found)...done.
(no debugging symbols found)...done.
Missing separate debuginfos, use: dnf debuginfo-install
clang-3.8.0-2.fc25.x86_64
(gdb) set follow-fork-mode child 
(gdb) r
Starting program: /usr/bin/clang-3.8 -v test.cpp -o test.out
[Thread debugging using libthread_db enabled]
Using host libthread_db library "/lib64/libthread_db.so.1".
clang version 3.8.0 (tags/RELEASE_380/final)
Target: x86_64-unknown-linux-gnu
Thread model: posix
InstalledDir: /usr/bin
Found candidate GCC installation: /usr/bin/../lib/gcc/x86_64-redhat-linux/6.2.1
Found candidate GCC installation: /usr/lib/gcc/x86_64-redhat-linux/6.2.1
Selected GCC installation: /usr/bin/../lib/gcc/x86_64-redhat-linux/6.2.1
Candidate multilib: .;@m64
Candidate multilib: 32;@m32
Selected multilib: .;@m64
 "/usr/bin/clang-3.8" -cc1 -triple x86_64-unknown-linux-gnu -emit-obj
-mrelax-all -disable-free -disable-llvm-verifier -main-file-name test.cpp
-mrelocation-model static -mthread-model posix -mdisable-fp-elim -fmath-errno
-masm-verbose -mconstructor-aliases -munwind-tables -fuse-init-array
-target-cpu x86-64 -v -dwarf-column-info -debugger-tuning=gdb -resource-dir
/usr/bin/../lib64/clang/3.8.0 -internal-isystem
/usr/bin/../lib/gcc/x86_64-redhat-linux/6.2.1/../../../../include/c++/6.2.1
-internal-isystem
/usr/bin/../lib/gcc/x86_64-redhat-linux/6.2.1/../../../../include/c++/6.2.1/x86_64-redhat-linux
-internal-isystem
/usr/bin/../lib/gcc/x86_64-redhat-linux/6.2.1/../../../../include/c++/6.2.1/backward
-internal-isystem /usr/local/include -internal-isystem
/usr/bin/../lib64/clang/3.8.0/include -internal-externc-isystem /include
-internal-externc-isystem /usr/include -fdeprecated-macro
-fdebug-compilation-dir /tmp -ferror-limit 19 -fmessage-length 203
-fobjc-runtime=gcc -fcxx-exceptions -fexceptions -fdiagnostics-show-option -o
/tmp/test-580659.o -x c++ test.cpp
[New process 21394]
[Thread debugging using libthread_db enabled]
Using host libthread_db library "/lib64/libthread_db.so.1".
process 21394 is executing new program: /usr/bin/clang-3.8
../../gdb/breakpoint.c:13853: internal-error: void
delete_breakpoint(breakpoint*): Assertion `bpt != NULL' failed.
A problem internal to GDB has been detected,
further debugging may prove unreliable.
Quit this debugging session? (y or n) y

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

../../gdb/breakpoint.c:13853: internal-error: void
delete_breakpoint(breakpoint*): Assertion `bpt != NULL' failed.
A problem internal to GDB has been detected,
further debugging may prove unreliable.
Create a core file of GDB? (y or n) n
clang-3.8: error: unable to execute command: Killed
clang-3.8: error: clang frontend command failed due to signal (use -v to see
invocation)
clang version 3.8.0 (tags/RELEASE_380/final)
Target: x86_64-unknown-linux-gnu
Thread model: posix
InstalledDir: /usr/bin
clang-3.8: note: diagnostic msg: PLEASE submit a bug report to  and include the
crash backtrace, preprocessed source, and associated run script.
********************

PLEASE ATTACH THE FOLLOWING FILES TO THE BUG REPORT:
Preprocessed source(s) and associated run script(s) are located at:
clang-3.8: note: diagnostic msg: /tmp/test-e36013.cpp
clang-3.8: note: diagnostic msg: /tmp/test-e36013.sh
clang-3.8: note: diagnostic msg: 

********************

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