https://gcc.gnu.org/bugzilla/show_bug.cgi?id=114997
Bug ID: 114997
Summary: ICE with -std=c++20: unexpected expression
‘static_cast<UnsignedType>('\"')’ of kind
static_cast_expr
Product: gcc
Version: 12.3.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: c++
Assignee: unassigned at gcc dot gnu.org
Reporter: clopez at igalia dot com
Target Milestone: ---
Created attachment 58137
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=58137&action=edit
preprocessed file from JSONObject.cpp to reproduce the problem
On the WebKit project recently this commit landed:
https://github.com/WebKit/WebKit/commit/4855c7a1dc4214523c0b3d0c430215456ed7a0a9
It caused GCC-12 to fail with an ICE.
./Source/JavaScriptCore/runtime/JSONObject.cpp: In lambda function:
./Source/JavaScriptCore/runtime/JSONObject.cpp:1124:89: internal compiler
error: unexpected expression ‘static_cast<UnsignedType>('\"')’ of kind
static_cast_expr
1124 | constexpr auto quoteMask =
WTF::splatBulk(static_cast<UnsignedType>('"'));
|
^
0x7ffb005ff1c9 __libc_start_call_main
../sysdeps/nptl/libc_start_call_main.h:58
0x7ffb005ff284 __libc_start_main_impl
../csu/libc-start.c:360
Please submit a full bug report, with preprocessed source (by using
-freport-bug).
Please include the complete backtrace with any bug report.
See <https://gcc.gnu.org/bugs/> for instructions.
I checked that it fails with the last released version of GCC 12 (12.3.0) both
from Yocto
when cross-building for ARM64 as well as the GCC 12.3.0 shipped in
Debian/testing.
On Debian I tested with gcc-13 and with it builds fine.
I'm attaching the .ii file to reproduce the problem (compressed with xz as it
is quite big)
To reproduce it, download the .ii file and simple execute this command:
g++-12 -O3 --std=c++20 -c JSONObject.ii
Not sure if useful information, but the original compiler command had the
following switches enabled
g++-12 -DBUILDING_JavaScriptCore -DBUILDING_WEBKIT=1 -DBUILDING_WITH_CMAKE=1
-DBUILDING_WPE__=1 -DBWRAP_EXECUTABLE=\"/usr/bin/bwrap\"
-DDBUS_PROXY_EXECUTABLE=\"/usr/bin/xdg-dbus-proxy\" -DGETTEXT_PACKAGE=\"WPE\"
-DHAVE_CONFIG_H=1 -DJSC_GLIB_API_ENABLED -DPAS_BMALLOC=1
-DPKGLIBDIR=\"/usr/local/lib/wpe-webkit-2.0\" -DSTATICALLY_LINKED_WITH_WTF
-DSTATICALLY_LINKED_WITH_bmalloc
[...-I/long/list/of/includes/excluded/for/clarity...]
-fdiagnostics-color=always -Wextra -Wall -fmax-errors=20 -Wno-odr
-Wno-stringop-overread -Wno-stringop-overflow -Wno-nonnull -Wno-array-bounds
-Wno-expansion-to-defined -Wno-noexcept-type -Wno-psabi
-Wno-misleading-indentation -Wno-maybe-uninitialized -Wundef -Wpointer-arith
-Wmissing-format-attribute -Wformat-security -Wcast-align
-Wno-tautological-compare -fno-strict-aliasing -fno-exceptions -fno-rtti
-ffunction-sections -fdata-sections -O3 -DNDEBUG -fPIC -fvisibility=hidden
-fvisibility-inlines-hidden -ffp-contract=off -std=c++20 -c
Source/JavaScriptCore/runtime/JSONObject.cpp
