[ruby-core:79958] [Ruby trunk Bug#13288] mingw issues with 57789

Issue #13288 has been updated by Greg L.


Shyouhei,

Not a good day so far.  A couple rev's of i686 built, responded to -v, but test-all is a mess.  Spent some time revising my build code and looking around libffi.

Testing 57788 did not yield results similar to what I recall seeing with i686 in the past.  MSYS2 had some updates recently, so will soon try to check those.  Mostly on i686 today.

Reminder, yesterday, after MSYS2 updates, got the following (which is a good result)

```
16615 tests, 2227473 assertions, 10 failures, 4 errors, 150 skips
ruby -v: ruby 2.5.0dev (2017-03-06 trunk 57788) [x64-mingw32]
``` 


Hence, with current MSYS2/mingw system:

x64 57788 and prior builds fine

i686 builds have issues compared to the last good data I have:

```
17074 tests, 4982778 assertions, 12 failures, 9 errors, 147 skips
ruby -v: ruby 2.5.0dev (2017-03-01 trunk 57712) [i386-mingw32]
```

Question - the results I posted in #7.  Do they indicate the SEGV is in libffi-6.dll?  I assume it could also be caused by fiddle.so.

Back when I was working on seeing if gdbm 1.12 would work with ruby (don't think so), I was comparing patches between MSYS2, cygwin, and ruby.  With libffi, I found the following:

[mingw fix_return_size.patch](https://github.com/Alexpux/MINGW-packages/blob/master/mingw-w64-libffi/fix_return_size.patch)
[cygwin 3.2.1-win64-rewrite.patch](https://github.com/cygwinports/libffi/blob/master/3.2.1-win64-rewrite.patch)
[ruby libffi-3.2.1-mswin.patch](https://github.com/ruby/ruby/blob/trunk/ext/fiddle/win32/libffi-3.2.1-mswin.patch)

No idea whether it's applicable...

----------------------------------------
Bug #13288: mingw issues with 57789
https://bugs.ruby-lang.org/issues/13288#change-63383

* Author: Greg L
* Status: Assigned
* Priority: Normal
* Assignee: Shyouhei Urabe
* Target version: 
* ruby -v: ruby 2.5.0dev (2017-03-06 trunk 57789) [x64-mingw32]
* Backport: 2.2: UNKNOWN, 2.3: UNKNOWN, 2.4: UNKNOWN
----------------------------------------
I have been building trunk with mingw/MSYS2 for a few months. I also created packages using OpenSSL 1.1.0e and gdbm 1.10.

Yesterday, I build 57782 with no major issues. Today, when I built 57789 (this commit) I had a segfault in the test-all section. the build.log was fine, and it responds to ruby -v, but I haven't tested further.

I built 57782 and 57788 with no major issues. I built 57789 again, and again, the segfault occurred.

The full log is at [x86_64-check.log](https://github.com/MSP-Greg/ruby-makepkg-mingw/blob/master/ruby_seg_fault/x86_64-check.log), also attached.

I'm not a c type, so if there's anything else you need or would like me to check, please let me know.

---Files--------------------------------
x86_64-check.log (75 KB)


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