https://gcc.gnu.org/bugzilla/show_bug.cgi?id=115312
Bug ID: 115312
Summary: [14/15 Regression] ICE when including a PCH via
compiler option -include
Product: gcc
Version: 14.1.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: pch
Assignee: unassigned at gcc dot gnu.org
Reporter: gcc at mailinator dot com
Target Milestone: ---
Host: x86_64-w64-mingw32
Target: x86_64-w64-mingw32
Build: x86_64-w64-mingw32
An internal compiler error is triggered in GCC 14.1.0 when including a
precompiled header via compiler option -include. A testcase is provided below:
```
touch test.cpp
touch test.h
g++ test.h
g++ -include test.h -c test.cpp -save-temps
test.cpp:1: internal compiler error: in c_init_preprocess, at cp/parser.cc:790
Please submit a full bug report, with preprocessed source (by using
-freport-bug).
See <https://gcc.gnu.org/bugs/> for instructions.
```
This issue shows up on (i686|x86_64)-w64-mingw32 platforms. GCC 14.1.0 releases
from MSYS2 and WinLibs projects are affected.
I have done some tests with prebuilt GCC 14 pre-releases from WinLibs project.
- Last working GCC 14 pre-release is from snapshot gcc-14-20231119.
- First GCC 14 pre-release with this issue is from snapshot gcc-14-20231217.
