Apparent stack overflow when parsing simple example

[aytey]

Issue

I have the following example:

export module hello;

import std.core;

export namespace hello {
  void say_hello(uint32_t count);
}

which I compile as follows:

cl.exe /W4 /WX /experimental:module /interface /sourceDependencies . /std:c++latest /EHsc /MD /c hello.cpp

If I then try to parse hello.ifc with ifc-printer, I get:

scope-1
\-decl.scope-0 'namespace' hello reachable(initializer)
  \-scope-2
    \-decl.function-0 'void(decl-type(decl.reference-0))' say_hello home-scope(decl.scope-0) public external
      \-chart.unilevel
        \-decl.parameter-0 'decl-type(decl.reference-0)'
decl.reference-0 std.core decl.alias-22
[5]    27025 segmentation fault (core dumped)  ~/clones/ifc/build/ifc-printer hello.ifc

Inside of gdb, here's what the backtrace looks like:

#0  0x000055555557ad24 in index_like::null<ifc::TypeIndex> (t=<error reading variable: Cannot access memory at address 0x7fffff7feffc>)
    at /home/avj/clones/ifc/include/ifc/index-utils.hxx:65
#1  0x00005555555742b8 in ifc::util::Loader::ref<ifc::TypeIndex> (this=0x7fffffffbc40, index=...) at /home/avj/clones/ifc/include/ifc/dom/node.hxx:220
#2  0x0000555555598d51 in ifc::util::(anonymous namespace)::TypeTranslator::operator() (this=0x7fffff7ff1a8, type=...) at /home/avj/clones/ifc/src/ifc-dom/types.cxx:139
#3  0x0000555555599371 in ifc::Reader::visit<ifc::util::(anonymous namespace)::TypeTranslator> (this=0x7fffffffbcb0, index=..., f=...) at /home/avj/clones/ifc/include/ifc/reader.hxx:187
#4  0x0000555555599468 in ifc::util::get_string_if_possible[abi:cxx11](ifc::util::Loader&, ifc::TypeIndex) (ctx=..., index=...) at /home/avj/clones/ifc/src/ifc-dom/types.cxx:163
#5  0x0000555555574317 in ifc::util::Loader::ref<ifc::TypeIndex> (this=0x7fffffffbc40, index=...) at /home/avj/clones/ifc/include/ifc/dom/node.hxx:223
#6  0x0000555555598d51 in ifc::util::(anonymous namespace)::TypeTranslator::operator() (this=0x7fffff7ff358, type=...) at /home/avj/clones/ifc/src/ifc-dom/types.cxx:139
#7  0x0000555555599371 in ifc::Reader::visit<ifc::util::(anonymous namespace)::TypeTranslator> (this=0x7fffffffbcb0, index=..., f=...) at /home/avj/clones/ifc/include/ifc/reader.hxx:187
#8  0x0000555555599468 in ifc::util::get_string_if_possible[abi:cxx11](ifc::util::Loader&, ifc::TypeIndex) (ctx=..., index=...) at /home/avj/clones/ifc/src/ifc-dom/types.cxx:163
#9  0x0000555555574317 in ifc::util::Loader::ref<ifc::TypeIndex> (this=0x7fffffffbc40, index=...) at /home/avj/clones/ifc/include/ifc/dom/node.hxx:223
#10 0x0000555555598d51 in ifc::util::(anonymous namespace)::TypeTranslator::operator() (this=0x7fffff7ff508, type=...) at /home/avj/clones/ifc/src/ifc-dom/types.cxx:139
#11 0x0000555555599371 in ifc::Reader::visit<ifc::util::(anonymous namespace)::TypeTranslator> (this=0x7fffffffbcb0, index=..., f=...) at /home/avj/clones/ifc/include/ifc/reader.hxx:187
#12 0x0000555555599468 in ifc::util::get_string_if_possible[abi:cxx11](ifc::util::Loader&, ifc::TypeIndex) (ctx=..., index=...) at /home/avj/clones/ifc/src/ifc-dom/types.cxx:163
#13 0x0000555555574317 in ifc::util::Loader::ref<ifc::TypeIndex> (this=0x7fffffffbc40, index=...) at /home/avj/clones/ifc/include/ifc/dom/node.hxx:223
#14 0x0000555555598d51 in ifc::util::(anonymous namespace)::TypeTranslator::operator() (this=0x7fffff7ff6b8, type=...) at /home/avj/clones/ifc/src/ifc-dom/types.cxx:139
#15 0x0000555555599371 in ifc::Reader::visit<ifc::util::(anonymous namespace)::TypeTranslator> (this=0x7fffffffbcb0, index=..., f=...) at /home/avj/clones/ifc/include/ifc/reader.hxx:187
#16 0x0000555555599468 in ifc::util::get_string_if_possible[abi:cxx11](ifc::util::Loader&, ifc::TypeIndex) (ctx=..., index=...) at /home/avj/clones/ifc/src/ifc-dom/types.cxx:163
#17 0x0000555555574317 in ifc::util::Loader::ref<ifc::TypeIndex> (this=0x7fffffffbc40, index=...) at /home/avj/clones/ifc/include/ifc/dom/node.hxx:223
<snip snip ... goes on forever>

Some specifics

MSVC version

Microsoft (R) C/C++ Optimizing Compiler Version 19.40.33521 for x64
Copyright (C) Microsoft Corporation.  All rights reserved.

Compiler Passes:
 Z:\home\avj\visual_studio\MSVC\14.40.33521\bin\Hostx64\x64\cl.exe:        Version 19.40.33521.0
 Z:\home\avj\visual_studio\MSVC\14.40.33521\bin\Hostx64\x64\c1.dll:        Version 19.40.33521.0
 Z:\home\avj\visual_studio\MSVC\14.40.33521\bin\Hostx64\x64\c1xx.dll:      Version 19.40.33521.0
 Z:\home\avj\visual_studio\MSVC\14.40.33521\bin\Hostx64\x64\c2.dll:        Version 19.40.33521.0
 Z:\home\avj\visual_studio\MSVC\14.40.33521\bin\Hostx64\x64\c1xx.dll:      Version 19.40.33521.0
 Z:\home\avj\visual_studio\MSVC\14.40.33521\bin\Hostx64\x64\link.exe:      Version 14.40.33521.0
 Z:\home\avj\visual_studio\MSVC\14.40.33521\bin\Hostx64\x64\mspdb140.dll:  Version 14.40.33521.0
 Z:\home\avj\visual_studio\MSVC\14.40.33521\bin\Hostx64\x64\1033\clui.dll: Version 19.40.33521.0

cl : Command line error D8003 : missing source filename

ifc version

git rev-parse --short HEAD
610da21

Host machine

avj@pika ~/clones/ifc$ uname -a
Linux pika 6.7.7-1-default #1 SMP PREEMPT_DYNAMIC Fri Mar  1 13:51:21 UTC 2024 (1ff84c5) x86_64 x86_64 x86_64 GNU/Linux

avj@pika ~/clones/ifc$ lsb-release -a
LSB Version:    n/a
Distributor ID: openSUSE
Description:    openSUSE Tumbleweed
Release:        20240302
Codename:       n/a

avj@pika ~/clones/ifc$ ldd --version
ldd (GNU libc) 2.39
Copyright (C) 2024 Free Software Foundation, Inc.
This is free software; see the source for copying conditions.  There is NO
warranty; not even for MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
Written by Roland McGrath and Ulrich Drepper.

avj@pika ~/clones/ifc$ gcc --version
gcc (SUSE Linux) 10.4.0
Copyright (C) 2020 Free Software Foundation, Inc.
This is free software; see the source for copying conditions.  There is NO
warranty; not even for MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.