[Bug c++/98983] New: SEGV during C++17 variadic template instantiation

[alison--- via Gcc-bugs]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=98983

Bug ID: 98983
   Summary: SEGV during C++17 variadic template instantiation
   Product: gcc
   Version: 10.2.1
Status: UNCONFIRMED
  Severity: normal
  Priority: P3
 Component: c++
  Assignee: unassigned at gcc dot gnu.org
  Reporter: ali...@she-devel.com
  Target Milestone: ---

The code that causes the crash relies on GCC's typeclass.h and the folly
project's StaticTracepoint.h, which implements support for Linux BPF userspace
static tracing.   I will attach the requested preprocessor output.   The code
also crashes clang++.   I do not work for F**k: this is my personal weekend
hack project. 

$ make arg_classifier_lib_test
/usr/bin/g++ -std=c++17 -pthread -ggdb -Wall -Wextra -g -O0 -fno-inline
-fsanitize=address,undefined
-I/home/alison/gitsrc/googletest/googletest/include -ggdb -g -fsanitize=address
-L/home/alison/gitsrc/googletest/googletest/make -lpthread
-I/home/alison/gitsrc/gcc -I/home/alison/gitsrc/folly
/home/alison/gitsrc/googletest/googletest/make/libgtest.a
/home/alison/gitsrc/googletest/googletest/make/libgtest_main.a
/home/alison/gitsrc/fbcode-install/folly/lib/libfolly.a
/home/alison/gitsrc/fbcode-install/folly/lib/libfolly_test_util.a
arg_classifier_lib_test.cc -o arg_classifier_lib_test
In file included from
/home/alison/gitsrc/folly/folly/tracing/StaticTracepoint.h:22,
 from arg_classifier.h:8,
 from arg_classifier_lib_test.cc:12:
arg_classifier.h: In instantiation of ‘bool
arg_classify::maybe_insert_folly_sdt_probe(const char*, const char*, T, Pars
...) [with T = int; Pars = {int}]’:
arg_classifier_lib_test.cc:194:3:   required from here
/home/alison/gitsrc/folly/folly/tracing/StaticTracepoint-ELFx86.h:53:65:
internal compiler error: Segmentation fault

[Bug c++/98983] SEGV during C++17 variadic template instantiation

[alison--- via Gcc-bugs]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=98983

--- Comment #2 from Alison Chaiken  ---
Created attachment 50147
  --> https://gcc.gnu.org/bugzilla/attachment.cgi?id=50147&action=edit
compressed preprocessor output

[Bug c++/98983] SEGV during C++17 variadic template instantiation

[alison--- via Gcc-bugs]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=98983

--- Comment #3 from Alison Chaiken  ---
The folly source referred to below comes from 

https://github.com/facebook/folly.git

I do not work for F**k and am simply trying to make use of their tracing
functionality in their StaticTracepoint.h header.

[Bug c++/98983] SEGV during C++17 variadic template instantiation

[alison--- via Gcc-bugs]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=98983

--- Comment #4 from Alison Chaiken  ---
The folly source referred to below comes from 

https://github.com/facebook/folly.git

I do not work for F**k and am simply trying to make use of their tracing
functionality in their StaticTracepoint.h header.