mingw32: exception handling broken (breaks ccache etc) #9771

mmuetzel · 2021-10-14T17:00:41Z

ccache doesn't work with MINGW32/MSYS2.

Steps to reproduce on the 32-bit bash:

pacman -Syu
pacman -S mingw-w64-i686-ccache
ccache -s

Expected result:
The statistics for ccache should be displayed.

Actual result:

$ ccache -s
terminate called after throwing an instance of 'core::Error'
terminate called recursively

This was still working on CI builds running on Oct 12 8:50 CEDT.
First affected CI build is from Oct 13 4:30 CEDT.

The text was updated successfully, but these errors were encountered:

jeremyd2019 · 2021-10-14T18:01:29Z

Sounds familiar. #9289

lazka · 2021-10-14T18:45:41Z

the last gcc/gcc-libs rebuild triggered this... somehow...

lazka · 2021-10-15T06:02:46Z

Restoring libstdc++-6.dll from mingw-w64-i686-gcc-libs-10.3.0-5 fixes the issue

Alexpux · 2021-10-15T06:09:19Z

so need to see build log difference whats going on to bisect issue

lazka · 2021-10-15T06:13:54Z

the logs of the old build are older than 90 days and have expired sadly

Alexpux · 2021-10-15T07:19:37Z

I will try rebuild locally. Im never use ccache as it lead to errors time to time

lazka · 2021-10-15T07:31:48Z

I tried rebuilding gcc locally, it didn't help.

lazka · 2021-10-15T07:36:34Z

c++ exception handling is broken in general... the simplest examples fail to catch. Restoring the old libstdc++-6.dll (from https://repo.msys2.org/mingw/mingw32/mingw-w64-i686-gcc-libs-10.3.0-5-any.pkg.tar.zst) makes things work again.

#include <iostream>

int main () {
   try {
      throw "OK";
   } catch (const char* msg) {
     std::cerr << msg << std::endl;
   }
   return 0;
}

lazka · 2021-10-16T05:22:06Z

here is a (broken) libstdc++-6 with symbols libstdc++-6.zip

since gdb is broken by this too, one needs to use msys gdb:

/usr/bin/gdb --args ccache -s
> catch throw
> run
> ...

This goes through a bunch of dwarf2 exception handling code, but I don't know how to debug this, maybe someone else does

$ /usr/bin/gdb --args ccache -s
GNU gdb (GDB) 10.2
Copyright (C) 2021 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-pc-msys".
Type "show configuration" for configuration details.
For bug reporting instructions, please see:
<https://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 ccache...
(No debugging symbols found in ccache)
(gdb) catch throw
Catchpoint 1 (throw)
(gdb) run
Starting program: /mingw32/bin/ccache -s
[New Thread 9608.0x1a48]
[New Thread 9608.0x3e08]
[New Thread 9608.0x3394]

Thread 1 hit Catchpoint 1 (exception thrown), __cxxabiv1::__cxa_throw (obj=0xe79d50, tinfo=0x10482fc, dest=0xfe16b0)
    at ../../../../gcc-10.3.0/libstdc++-v3/libsupc++/eh_throw.cc:80
80        __cxa_eh_globals *globals = __cxa_get_globals ();
(gdb) n
81        globals->uncaughtExceptions += 1;
(gdb) n
83        __cxa_refcounted_exception *header =
(gdb) n
85        header->referenceCount = 1;
(gdb) n
90        _Unwind_RaiseException (&header->exc.unwindHeader);
(gdb) n
94        __cxa_begin_catch (&header->exc.unwindHeader);
(gdb) n
95        std::terminate ();
(gdb) n
[Thread 9608.0x3394 exited with code 3]
[Thread 9608.0x3e08 exited with code 3]
[Thread 9608.0x1a48 exited with code 3]
terminate called after throwing an instance of 'core::Error'
terminate called recursively

Program terminated with signal SIGQUIT, Quit.
The program no longer exists.
(gdb) n

lazka · 2021-10-16T05:22:44Z

related upstream discussion: https://gcc.gnu.org/bugzilla/show_bug.cgi?id=100486

revelator · 2021-10-16T05:33:37Z

so it now also affects the older build Oo omg...

See also: msys2/MINGW-packages#9771

oscarfv · 2021-10-16T21:04:33Z

This is deja vu all over again.

Read #4728 (comment) and subsequent comments.

Then notice msys2/MSYS2-packages@990d969#diff-73207f91bc9ff822e2e6fc6cf400758228873068eb53db6dff69c8c6c5a181a9

Maybe it is worth a shot.

jeremyd2019 · 2021-10-16T21:07:28Z

omg, is that the fallout of the issue with grep? 🤯

lazka · 2021-10-16T22:08:01Z

the timeline matches. thanks @oscarfv

oscarfv · 2021-10-16T23:16:17Z

After reverting grep to 3.0-2 and building i686 gcc 11.2 (without Ada), C++ exceptions seem to work fine again.

Alexpux · 2021-10-17T06:33:53Z

@oscarfv good catch, I'm not update grep because upstream remove support for handling Windows line endings. This is discussed in Msys-packages times ago. I think we need add some message about this into grep PKGBUILD.

Alexpux · 2021-10-17T07:06:32Z

For history look:
msys2/MSYS2-packages#1353
msys2/MSYS2-packages#2163

revelator · 2021-10-17T11:14:49Z

urgh what a goosechase :S this turned out to be, good catch with the grep issue.

revelator · 2021-10-17T16:37:49Z

well one good thing or rather a bad one depending on how you look at it is that we can now do a bootstrap of gcc-11.1 but as before only using an sjlj compiler if you need ada support, exceptions should work in that build. but it might be prudent to wait on the results of the upstream bug report instead.

lazka · 2021-10-17T17:28:36Z

For completeness I tried to figure out why this is failing, but there are too many layers and build magic, so I give up:

rm -rf i686-w64-mingw32/libstdc++-v3
make all-target-libstdc++-v3 -j1
cp i686-w64-mingw32/libstdc++-v3/src/.libs/libstdc++-6.dll /mingw32/bin

is enough to fix it with the grep revert

Diff of the configure output:

--- broken.txt	2021-10-17 19:15:31.582312000 +0200
+++ ok.txt	2021-10-17 19:10:29.938561300 +0200
@@ -1058,7 +1057,7 @@
 libtool: compile:  /home/user/M/mingw-w64-gcc/src/build-i686-w64-mingw32/./gcc/xgcc -shared-libgcc -B/home/user/M/mingw-w64-gcc/src/build-i686-w64-mingw32/./gcc -nostdinc++ -L/home/user/M/mingw-w64-gcc/src/build-i686-w64-mingw32/i686-w64-mingw32/libstdc++-v3/src -L/home/user/M/mingw-w64-gcc/src/build-i686-w64-mingw32/i686-w64-mingw32/libstdc++-v3/src/.libs -L/home/user/M/mingw-w64-gcc/src/build-i686-w64-mingw32/i686-w64-mingw32/libstdc++-v3/libsupc++/.libs -L/mingw32/i686-w64-mingw32/lib -L/mingw32/lib -isystem /mingw32/i686-w64-mingw32/include -isystem /mingw32/include -B/mingw32/i686-w64-mingw32/bin/ -B/mingw32/i686-w64-mingw32/lib/ -isystem /mingw32/i686-w64-mingw32/include -isystem /mingw32/i686-w64-mingw32/sys-include -I/home/user/M/mingw-w64-gcc/src/build-i686-w64-mingw32/i686-w64-mingw32/libstdc++-v3/include/i686-w64-mingw32 -I/home/user/M/mingw-w64-gcc/src/build-i686-w64-mingw32/i686-w64-mingw32/libstdc++-v3/include -I/home/user/M/mingw-w64-gcc/src/gcc-10.3.0/libstdc++-v3/libsupc++ -I/mingw32/include -I/mingw32/include -std=gnu++98 -DDLL_EXPORT -DPIC -fno-implicit-templates -Wall -Wextra -Wwrite-strings -Wcast-qual -Wabi=2 -fdiagnostics-show-location=once -ffunction-sections -fdata-sections -frandom-seed=compatibility-condvar.lo -g -march=pentium4 -mtune=generic -O2 -pipe -std=gnu++11 -c ../../../../gcc-10.3.0/libstdc++-v3/src/c++11/compatibility-condvar.cc  -DDLL_EXPORT -DPIC -D_GLIBCXX_SHARED -o .libs/compatibility-condvar.o
 libtool: compile:  /home/user/M/mingw-w64-gcc/src/build-i686-w64-mingw32/./gcc/xgcc -shared-libgcc -B/home/user/M/mingw-w64-gcc/src/build-i686-w64-mingw32/./gcc -nostdinc++ -L/home/user/M/mingw-w64-gcc/src/build-i686-w64-mingw32/i686-w64-mingw32/libstdc++-v3/src -L/home/user/M/mingw-w64-gcc/src/build-i686-w64-mingw32/i686-w64-mingw32/libstdc++-v3/src/.libs -L/home/user/M/mingw-w64-gcc/src/build-i686-w64-mingw32/i686-w64-mingw32/libstdc++-v3/libsupc++/.libs -L/mingw32/i686-w64-mingw32/lib -L/mingw32/lib -isystem /mingw32/i686-w64-mingw32/include -isystem /mingw32/include -B/mingw32/i686-w64-mingw32/bin/ -B/mingw32/i686-w64-mingw32/lib/ -isystem /mingw32/i686-w64-mingw32/include -isystem /mingw32/i686-w64-mingw32/sys-include -I/home/user/M/mingw-w64-gcc/src/build-i686-w64-mingw32/i686-w64-mingw32/libstdc++-v3/include/i686-w64-mingw32 -I/home/user/M/mingw-w64-gcc/src/build-i686-w64-mingw32/i686-w64-mingw32/libstdc++-v3/include -I/home/user/M/mingw-w64-gcc/src/gcc-10.3.0/libstdc++-v3/libsupc++ -I/mingw32/include -I/mingw32/include -std=gnu++98 -DDLL_EXPORT -DPIC -fno-implicit-templates -Wall -Wextra -Wwrite-strings -Wcast-qual -Wabi=2 -fdiagnostics-show-location=once -ffunction-sections -fdata-sections -frandom-seed=compatibility-condvar.lo -g -march=pentium4 -mtune=generic -O2 -pipe -std=gnu++11 -c ../../../../gcc-10.3.0/libstdc++-v3/src/c++11/compatibility-condvar.cc -o compatibility-condvar.o >/dev/null 2>&1
 /bin/sh ../libtool --tag CXX   --mode=link /home/user/M/mingw-w64-gcc/src/build-i686-w64-mingw32/./gcc/xgcc -shared-libgcc -B/home/user/M/mingw-w64-gcc/src/build-i686-w64-mingw32/./gcc -nostdinc++ -L/home/user/M/mingw-w64-gcc/src/build-i686-w64-mingw32/i686-w64-mingw32/libstdc++-v3/src -L/home/user/M/mingw-w64-gcc/src/build-i686-w64-mingw32/i686-w64-mingw32/libstdc++-v3/src/.libs -L/home/user/M/mingw-w64-gcc/src/build-i686-w64-mingw32/i686-w64-mingw32/libstdc++-v3/libsupc++/.libs -L/mingw32/i686-w64-mingw32/lib -L/mingw32/lib -isystem /mingw32/i686-w64-mingw32/include -isystem /mingw32/include -B/mingw32/i686-w64-mingw32/bin/ -B/mingw32/i686-w64-mingw32/lib/ -isystem /mingw32/i686-w64-mingw32/include -isystem /mingw32/i686-w64-mingw32/sys-include     -Wl,-O1  -no-undefined -bindir "/mingw32/bin" -Wl,--gc-sections  -std=gnu++98 -DDLL_EXPORT -DPIC -fno-implicit-templates  -Wall -Wextra -Wwrite-strings -Wcast-qual -Wabi=2  -fdiagnostics-show-location=once   -ffunction-sections -fdata-sections  -frandom-seed=libstdc++.la  '-pipe' '-Wl,--dynamicbase,--nxcompat,--no-seh' '-Wl,--large-address-aware' -o libstdc++.la -version-info 6:28:0  -lm -rpath /mingw32/lib/../lib compatibility.lo compatibility-debug_list.lo compatibility-debug_list-2.lo  compatibility-c++0x.lo compatibility-atomic-c++0x.lo compatibility-thread-c++0x.lo compatibility-chrono.lo compatibility-condvar.lo  ../libsupc++/libsupc++convenience.la ../src/c++98/libc++98convenience.la ../src/c++11/libc++11convenience.la ../src/c++17/libc++17convenience.la 
-libtool: link:  /home/user/M/mingw-w64-gcc/src/build-i686-w64-mingw32/./gcc/xgcc -shared-libgcc -B/home/user/M/mingw-w64-gcc/src/build-i686-w64-mingw32/./gcc -nostdinc++ -L/home/user/M/mingw-w64-gcc/src/build-i686-w64-mingw32/i686-w64-mingw32/libstdc++-v3/src -L/home/user/M/mingw-w64-gcc/src/build-i686-w64-mingw32/i686-w64-mingw32/libstdc++-v3/src/.libs -L/home/user/M/mingw-w64-gcc/src/build-i686-w64-mingw32/i686-w64-mingw32/libstdc++-v3/libsupc++/.libs -L/mingw32/i686-w64-mingw32/lib -L/mingw32/lib -isystem /mingw32/i686-w64-mingw32/include -isystem /mingw32/include -B/mingw32/i686-w64-mingw32/bin/ -B/mingw32/i686-w64-mingw32/lib/ -isystem /mingw32/i686-w64-mingw32/include -isystem /mingw32/i686-w64-mingw32/sys-include    -shared -nostdlib C:/msys64/mingw32/i686-w64-mingw32/lib/dllcrt2.o C:/msys64/home/user/M/mingw-w64-gcc/src/build-i686-w64-mingw32/gcc/crtbegin.o  .libs/compatibility.o .libs/compatibility-debug_list.o .libs/compatibility-debug_list-2.o .libs/compatibility-c++0x.o .libs/compatibility-atomic-c++0x.o .libs/compatibility-thread-c++0x.o .libs/compatibility-chrono.o .libs/compatibility-condvar.o  -Wl,--whole-archive ../libsupc++/.libs/libsupc++convenience.a ../src/c++98/.libs/libc++98convenience.a ../src/c++11/.libs/libc++11convenience.a ../src/c++17/.libs/libc++17convenience.a -Wl,--no-whole-archive  -L/home/user/M/mingw-w64-gcc/src/build-i686-w64-mingw32/i686-w64-mingw32/libstdc++-v3/libsupc++/.libs -L/home/user/M/mingw-w64-gcc/src/build-i686-w64-mingw32/i686-w64-mingw32/libstdc++-v3/src -L/home/user/M/mingw-w64-gcc/src/build-i686-w64-mingw32/i686-w64-mingw32/libstdc++-v3/src/.libs -L/mingw32/i686-w64-mingw32/lib -L/mingw32/lib -LC:/msys64/home/user/M/mingw-w64-gcc/src/build-i686-w64-mingw32/i686-w64-mingw32/libstdc++-v3/src -LC:/msys64/home/user/M/mingw-w64-gcc/src/build-i686-w64-mingw32/i686-w64-mingw32/libstdc++-v3/src/.libs -LC:/msys64/home/user/M/mingw-w64-gcc/src/build-i686-w64-mingw32/i686-w64-mingw32/libstdc++-v3/libsupc++/.libs -LC:/msys64/mingw32/i686-w64-mingw32/lib -LC:/msys64/mingw32/lib -LC:/msys64/home/user/M/mingw-w64-gcc/src/build-i686-w64-mingw32/gcc -LC:/msys64/mingw32/i686-w64-mingw32/bin -LC:/msys64/mingw32/i686-w64-mingw32/lib/../lib -lmingw32 -lgcc_s -lgcc -lmoldname -lmingwex -lmsvcrt -lkernel32 -lpthread -ladvapi32 -lshell32 -luser32 -lkernel32 -lmingw32 -lgcc_s -lgcc -lmoldname -lmingwex -lmsvcrt -lkernel32   -Wl,-O1 -Wl,--gc-sections -Wl,--dynamicbase -Wl,--nxcompat -Wl,--no-seh -Wl,--large-address-aware   -o .libs/libstdc++-6.dll -Wl,--enable-auto-image-base -Xlinker --out-implib -Xlinker .libs/libstdc++.dll.a
+libtool: link:  /home/user/M/mingw-w64-gcc/src/build-i686-w64-mingw32/./gcc/xgcc -shared-libgcc -B/home/user/M/mingw-w64-gcc/src/build-i686-w64-mingw32/./gcc -nostdinc++ -L/home/user/M/mingw-w64-gcc/src/build-i686-w64-mingw32/i686-w64-mingw32/libstdc++-v3/src -L/home/user/M/mingw-w64-gcc/src/build-i686-w64-mingw32/i686-w64-mingw32/libstdc++-v3/src/.libs -L/home/user/M/mingw-w64-gcc/src/build-i686-w64-mingw32/i686-w64-mingw32/libstdc++-v3/libsupc++/.libs -L/mingw32/i686-w64-mingw32/lib -L/mingw32/lib -isystem /mingw32/i686-w64-mingw32/include -isystem /mingw32/include -B/mingw32/i686-w64-mingw32/bin/ -B/mingw32/i686-w64-mingw32/lib/ -isystem /mingw32/i686-w64-mingw32/include -isystem /mingw32/i686-w64-mingw32/sys-include    -shared -nostdlib C:/msys64/mingw32/i686-w64-mingw32/lib/dllcrt2.o C:/msys64/home/user/M/mingw-w64-gcc/src/build-i686-w64-mingw32/gcc/crtbegin.o  .libs/compatibility.o .libs/compatibility-debug_list.o .libs/compatibility-debug_list-2.o .libs/compatibility-c++0x.o .libs/compatibility-atomic-c++0x.o .libs/compatibility-thread-c++0x.o .libs/compatibility-chrono.o .libs/compatibility-condvar.o  -Wl,--whole-archive ../libsupc++/.libs/libsupc++convenience.a ../src/c++98/.libs/libc++98convenience.a ../src/c++11/.libs/libc++11convenience.a ../src/c++17/.libs/libc++17convenience.a -Wl,--no-whole-archive  -L/home/user/M/mingw-w64-gcc/src/build-i686-w64-mingw32/i686-w64-mingw32/libstdc++-v3/libsupc++/.libs -L/home/user/M/mingw-w64-gcc/src/build-i686-w64-mingw32/i686-w64-mingw32/libstdc++-v3/src -L/home/user/M/mingw-w64-gcc/src/build-i686-w64-mingw32/i686-w64-mingw32/libstdc++-v3/src/.libs -L/mingw32/i686-w64-mingw32/lib -L/mingw32/lib -LC:/msys64/home/user/M/mingw-w64-gcc/src/build-i686-w64-mingw32/i686-w64-mingw32/libstdc++-v3/src -LC:/msys64/home/user/M/mingw-w64-gcc/src/build-i686-w64-mingw32/i686-w64-mingw32/libstdc++-v3/src/.libs -LC:/msys64/home/user/M/mingw-w64-gcc/src/build-i686-w64-mingw32/i686-w64-mingw32/libstdc++-v3/libsupc++/.libs -LC:/msys64/mingw32/i686-w64-mingw32/lib -LC:/msys64/mingw32/lib -LC:/msys64/home/user/M/mingw-w64-gcc/src/build-i686-w64-mingw32/gcc -LC:/msys64/mingw32/i686-w64-mingw32/bin -LC:/msys64/mingw32/i686-w64-mingw32/lib/../lib -lmingw32 -lgcc_s -lgcc -lmoldname -lmingwex -lmsvcrt -lkernel32 -lpthread -ladvapi32 -lshell32 -luser32 -lkernel32 -lmingw32 -lgcc_s -lgcc -lmoldname -lmingwex -lmsvcrt -lkernel32 C:/msys64/home/user/M/mingw-w64-gcc/src/build-i686-w64-mingw32/gcc/crtend.o  -Wl,-O1 -Wl,--gc-sections -Wl,--dynamicbase -Wl,--nxcompat -Wl,--no-seh -Wl,--large-address-aware   -o .libs/libstdc++-6.dll -Wl,--enable-auto-image-base -Xlinker --out-implib -Xlinker .libs/libstdc++.dll.a
 libtool: link: (cd .libs/libstdc++.lax/libsupc++convenience.a && /mingw32/i686-w64-mingw32/bin/ar x "/home/user/M/mingw-w64-gcc/src/build-i686-w64-mingw32/i686-w64-mingw32/libstdc++-v3/src/../libsupc++/.libs/libsupc++convenience.a")
 libtool: link: (cd .libs/libstdc++.lax/libc++98convenience.a && /mingw32/i686-w64-mingw32/bin/ar x "/home/user/M/mingw-w64-gcc/src/build-i686-w64-mingw32/i686-w64-mingw32/libstdc++-v3/src/../src/c++98/.libs/libc++98convenience.a")
 libtool: link: (cd .libs/libstdc++.lax/libc++11convenience.a && /mingw32/i686-w64-mingw32/bin/ar x "/home/user/M/mingw-w64-gcc/src/build-i686-w64-mingw32/i686-w64-mingw32/libstdc++-v3/src/../src/c++11/.libs/libc++11convenience.a")

Diff of the build dir (with some noise removed):

diff -Nur libstdc++-v3-broken/config.status libstdc++-v3/config.status
--- libstdc++-v3-broken/config.status	2021-10-17 18:44:48.811354600 +0200
+++ libstdc++-v3/config.status	2021-10-17 18:47:45.225970400 +0200
@@ -755,7 +755,7 @@
 hardcode_action_CXX='immediate'
 compiler_lib_search_dirs_CXX='C:/msys64/home/user/M/mingw-w64-gcc/src/build-i686-w64-mingw32/i686-w64-mingw32/libstdc++-v3/src C:/msys64/home/user/M/mingw-w64-gcc/src/build-i686-w64-mingw32/i686-w64-mingw32/libstdc++-v3/src/.libs C:/msys64/home/user/M/mingw-w64-gcc/src/build-i686-w64-mingw32/i686-w64-mingw32/libstdc++-v3/libsupc++/.libs C:/msys64/mingw32/i686-w64-mingw32/lib C:/msys64/mingw32/lib C:/msys64/home/user/M/mingw-w64-gcc/src/build-i686-w64-mingw32/gcc C:/msys64/mingw32/i686-w64-mingw32/bin C:/msys64/mingw32/i686-w64-mingw32/lib C:/msys64/mingw32/i686-w64-mingw32/lib/../lib C:/msys64/mingw32/i686-w64-mingw32/lib'
 predep_objects_CXX='C:/msys64/mingw32/i686-w64-mingw32/lib/dllcrt2.o C:/msys64/home/user/M/mingw-w64-gcc/src/build-i686-w64-mingw32/gcc/crtbegin.o'
-postdep_objects_CXX=''
+postdep_objects_CXX='C:/msys64/home/user/M/mingw-w64-gcc/src/build-i686-w64-mingw32/gcc/crtend.o'
 predeps_CXX=''
 postdeps_CXX=' -lmingw32 -lgcc_s -lgcc -lmoldname -lmingwex -lmsvcrt -lkernel32 -lpthread -ladvapi32 -lshell32 -luser32 -lkernel32 -lmingw32 -lgcc_s -lgcc -lmoldname -lmingwex -lmsvcrt -lkernel32 '
 compiler_lib_search_path_CXX='-LC:/msys64/home/user/M/mingw-w64-gcc/src/build-i686-w64-mingw32/i686-w64-mingw32/libstdc++-v3/src -LC:/msys64/home/user/M/mingw-w64-gcc/src/build-i686-w64-mingw32/i686-w64-mingw32/libstdc++-v3/src/.libs -LC:/msys64/home/user/M/mingw-w64-gcc/src/build-i686-w64-mingw32/i686-w64-mingw32/libstdc++-v3/libsupc++/.libs -LC:/msys64/mingw32/i686-w64-mingw32/lib -LC:/msys64/mingw32/lib -LC:/msys64/home/user/M/mingw-w64-gcc/src/build-i686-w64-mingw32/gcc -LC:/msys64/mingw32/i686-w64-mingw32/bin -LC:/msys64/mingw32/i686-w64-mingw32/lib -LC:/msys64/mingw32/i686-w64-mingw32/lib/../lib -LC:/msys64/mingw32/i686-w64-mingw32/lib'
diff -Nur libstdc++-v3-broken/libtool libstdc++-v3/libtool
--- libstdc++-v3-broken/libtool	2021-10-17 18:45:08.664364200 +0200
+++ libstdc++-v3/libtool	2021-10-17 18:48:05.241661100 +0200
@@ -9304,7 +9304,7 @@
 # Dependencies to place before and after the objects being linked to
 # create a shared library.
 predep_objects="C:/msys64/mingw32/i686-w64-mingw32/lib/dllcrt2.o C:/msys64/home/user/M/mingw-w64-gcc/src/build-i686-w64-mingw32/gcc/crtbegin.o"
-postdep_objects=""
+postdep_objects="C:/msys64/home/user/M/mingw-w64-gcc/src/build-i686-w64-mingw32/gcc/crtend.o"
 predeps=""
 postdeps=" -lmingw32 -lgcc_s -lgcc -lmoldname -lmingwex -lmsvcrt -lkernel32 -lpthread -ladvapi32 -lshell32 -luser32 -lkernel32 -lmingw32 -lgcc_s -lgcc -lmoldname -lmingwex -lmsvcrt -lkernel32 "

revelator · 2021-10-17T18:30:16Z

well it seems to be still looked at @https://gcc.gnu.org/bugzilla/show_bug.cgi?id=100486 so maybe a real fix will eventually crop up :)

jeremyd2019 · 2021-10-18T02:07:38Z

Oops, commented on wrong issue

raedrizqie · 2021-10-18T02:09:18Z

There is a reference to dwarf exception in libstdc++ x86_64 IIRC

lazka · 2021-10-18T05:55:13Z

new build uploaded

Jehan · 2021-10-18T10:33:18Z

The issue seems fixed as far as we can see (some building which failed yesterday now works). But since I see it is still opened, I wanted to ask and make sure you consider it's really good to go now, or if we should wait a bit.

Because we were planning a release yesterday which we postponed because of this issue. Yet if there are still issues to figure out, we don't mind waiting a bit more (a bit late is better than discovering bad surprises at runtime for a release build).

Biswa96 · 2021-10-18T12:24:03Z

Releasing GIMP?

Jehan · 2021-10-18T12:29:00Z

Yes. A dev release (nonetheless a release with official announcement). And we use MSYS2 for base packages on Windows to not have to rebuild everything. 🙂

lazka · 2021-10-18T20:19:01Z

yes, things should be back to "normal" now

LigH-de · 2021-10-19T20:55:41Z

M-AB-S with MinGW32 and ccache enabled works.

class101 · 2021-10-29T16:10:18Z

This is quickly closed imo, downgrading to grep 3.0 should be considered a temporary solution

grep is my most used tool whether I'm on Windows or Linux.

I'm not affected by this issue and I find this is a pity to downgrade grep just because a part of users can't get things working as before.

It just lacks a patch and issue should be reopened

mati865 · 2021-10-29T16:49:24Z

grep is my most used tool whether I'm on Windows or Linux.

You can still use mingw-w64-grep which is faster and up to date.

I'm not affected by this issue and I find this is a pity to downgrade grep just because a part of users can't get things working as before.

By part of users you mean developers of GCC or autotools?

It just lacks a patch and issue should be reopened

Sure you can open issue in MSYS2-packages repo, even better if you can provide patch to fix it.

revelator · 2022-09-14T20:10:42Z

still some problems with exceptions when linking to static libgcc / libstdc++, catches only first exception then aborts.
does not seem to affect the 64 bit compiler.

lazka · 2022-09-14T20:31:53Z

Yes, see https://www.msys2.org/docs/cpp/#known-issues

revelator · 2022-09-14T23:46:28Z

i may have a possible fix, it was intended for AIX which suffers the same problem (only happens with dwarf exceptions sjlj is unaffected) but let me test it first before i post a patch.

the fix is not OS related so should also work for us, im building gcc-12.2.0 with it atm so lets see.

revelator · 2022-09-15T22:25:55Z

sadly not enough with the patch, every program linked statically has broken exceptions :/ for a good laugh try building ninja with gcc-12.2.0 with these flags -static -static-libgcc -static-libstdc++ it will terminate allmost instantly with no error message.
jsoncpp is another one who is hit hard by this and since cmake relies on that library it also fails if linked statically.

this is the 32 bit compiler with dwarf exceptions btw, as mentioned the SEH based 64 bit compiler has no such problem and neither does the 32 bit sjlj exception model.

im ditching any gcc above version 10 untill this is fixed upstream in my personal build.

This was referenced Oct 14, 2021

Several non-descript cases of "core::Error" (msys2 general issue?) m-ab-s/media-autobuild_suite#2062

Closed

Several non-descript cases of "core::Error" while compiling with GCC 10.3 in MSYS2 tesseract-ocr/tesseract#3594

Closed

lazka changed the title ~~ccache fails on i686~~ mingw32: exception handling broken (breaks ccache etc) Oct 15, 2021

lazka mentioned this issue Oct 15, 2021

Exception handling is broken on mingw32 when using static runtime libraries. #9289

Open

kmilos mentioned this issue Oct 15, 2021

Release Pillow 8.4.0 on October 15, 2021 python-pillow/Pillow#5664

Closed

20 tasks

lazka pinned this issue Oct 15, 2021

hugovk mentioned this issue Oct 16, 2021

Qt test failures python-pillow/Pillow#5774

Closed

kou added a commit to kou/arrow that referenced this issue Oct 16, 2021

ARROW-14308: [C++][CI] Disable ccache on MinGW 32 temporary

0205e0a

See also: msys2/MINGW-packages#9771

kou mentioned this issue Oct 16, 2021

ARROW-14308: [C++][CI] Use old gcc-libs on MinGW 32 temporary apache/arrow#11443

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lazka unpinned this issue Oct 18, 2021

lazka closed this as completed Oct 18, 2021

Jehan mentioned this issue Oct 24, 2021

crash in rav1e.dll #9869

Closed

1480c1 mentioned this issue Oct 28, 2021

grep 3.6 update is a downgrade to grep 3.0 msys2/MSYS2-packages#2678

Open

cristianadam mentioned this issue Nov 7, 2021

Can't pass test when building i686 niXman/mingw-builds#558

Closed

mingw32: exception handling broken (breaks ccache etc) #9771

mingw32: exception handling broken (breaks ccache etc) #9771

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