[llvm-bugs] [Bug 44483] New: [Windows] evaluating a variable from an outer scope in a @finally inside a block causes an internal compiler error

[via llvm-bugs]

https://bugs.llvm.org/show_bug.cgi?id=44483

            Bug ID: 44483
           Summary: [Windows] evaluating a variable from an outer scope in
                    a @finally inside a block causes an internal compiler
                    error
           Product: clang
           Version: 9.0
          Hardware: PC
                OS: Windows NT
            Status: NEW
          Severity: normal
          Priority: P
         Component: -New Bugs
          Assignee: unassignedclangbugs at nondot.org
          Reporter: duhowett at microsoft.com
                CC: htmldeveloper at gmail.com, llvm-bugs at lists.llvm.org,
                    neeilans at live.com, richard-llvm at metafoo.co.uk

Created attachment 22996
  --> https://bugs.llvm.org/attachment.cgi?id=22996&action=edit
preprocessed repro

With the following source:

```
// clang -emit-llvm -S -fblocks --target=i686-pc-windows-msvc repro.mm
int test() {
    int outer;
    auto b = ^() {
        @try {
        } @finally {
            outer;
        }
    };
}
```

the compiler fails with the following stack dump.

```
Stack dump:
0.      Program arguments: C:\Program Files\LLVM\bin\clang.exe -cc1 -triple
i686-pc-windows-msvc19.11.0 -emit-llvm -disable-free -disable-llvm-verifier
-discard-value-names -main-file-name repro.mm -mrelocation-model static
-mthread-model posix -mdisable-fp-elim -fmath-errno -masm-verbose
-mconstructor-aliases -target-cpu pentium4 -dwarf-column-info
-coverage-notes-file E:\repro.gcno -resource-dir C:\Program
Files\LLVM\lib\clang\9.0.0 -internal-isystem C:\Program
Files\LLVM\lib\clang\9.0.0\include -internal-isystem C:\Program Files
(x86)\Microsoft Visual Studio\2019\Enterprise\VC\Tools\MSVC\14.23.28105\include
-internal-isystem C:\Program Files (x86)\Windows Kits\NETFXSDK\4.8\include\um
-internal-isystem C:\Program Files (x86)\Windows
Kits\10\include\10.0.18362.0\ucrt -internal-isystem C:\Program Files
(x86)\Windows Kits\10\include\10.0.18362.0\shared -internal-isystem C:\Program
Files (x86)\Windows Kits\10\include\10.0.18362.0\um -internal-isystem
C:\Program Files (x86)\Windows Kits\10\include\10.0.18362.0\winrt
-internal-isystem C:\Program Files (x86)\Windows
Kits\10\include\10.0.18362.0\cppwinrt -fdeprecated-macro
-fdebug-compilation-dir E:\ -ferror-limit 19 -fmessage-length 158 -fblocks
-fno-use-cxa-atexit -fms-extensions -fms-compatibility
-fms-compatibility-version=19.11 -std=c++14 -fdelayed-template-parsing
-fobjc-runtime=gcc -fobjc-exceptions -fcxx-exceptions -fexceptions
-fdiagnostics-show-option -fcolor-diagnostics -faddrsig -o repro.ll -x
objective-c++ repro.mm
1.      <eof> parser at end of file
2.      repro.mm:1:5: LLVM IR generation of declaration 'test'
3.      repro.mm:1:5: Generating code for declaration 'test'
4.      repro.mm:3:18: LLVM IR generation of compound statement ('{}')
 #0 0x00007ff64b3e349a C:\Program Files\LLVM\bin\clang.exe 0x19d349a C:\Program
Files\LLVM\bin\clang.exe 0x19d4903
 #1 0x00007ff64b3e349a C:\Program Files\LLVM\bin\clang.exe 0x1a6eccc C:\Program
Files\LLVM\bin\clang.exe 0x18d0c3a
 #2 0x00007ff64b3e349a C:\Program Files\LLVM\bin\clang.exe 0x1a710c4 C:\Program
Files\LLVM\bin\clang.exe 0x1a79dc0
 #3 0x00007ff64b3e349a C:\Program Files\LLVM\bin\clang.exe 0x1a7956b C:\Program
Files\LLVM\bin\clang.exe 0x1a71626
 #4 0x00007ff64b3e349a C:\Program Files\LLVM\bin\clang.exe 0x1a70b1f C:\Program
Files\LLVM\bin\clang.exe 0x1a9ef99
 #5 0x00007ff64b3e349a C:\Program Files\LLVM\bin\clang.exe 0x1a9bf22 C:\Program
Files\LLVM\bin\clang.exe 0x1a9a6bc
 #6 0x00007ff64b3e349a C:\Program Files\LLVM\bin\clang.exe 0x1acdf90 C:\Program
Files\LLVM\bin\clang.exe 0x1ac390e
 #7 0x00007ff64b3e349a C:\Program Files\LLVM\bin\clang.exe 0x1a0ffdf C:\Program
Files\LLVM\bin\clang.exe 0x1a14ebe
 #8 0x00007ff64b3e349a C:\Program Files\LLVM\bin\clang.exe 0x1a12948 C:\Program
Files\LLVM\bin\clang.exe 0x1a0e3d6
 #9 0x00007ff64b3e349a C:\Program Files\LLVM\bin\clang.exe 0x1a0e063 C:\Program
Files\LLVM\bin\clang.exe 0x1a7966c
#10 0x00007ff64b3e349a C:\Program Files\LLVM\bin\clang.exe 0x1a716b9 C:\Program
Files\LLVM\bin\clang.exe 0x1a70b1f
#11 0x00007ff64b3e349a C:\Program Files\LLVM\bin\clang.exe 0x1a79dc0 C:\Program
Files\LLVM\bin\clang.exe 0x1995cae
#12 0x00007ff64b3e349a C:\Program Files\LLVM\bin\clang.exe 0x1996599 C:\Program
Files\LLVM\bin\clang.exe 0x181cb1d
#13 0x00007ff64b3e349a C:\Program Files\LLVM\bin\clang.exe 0x181618c C:\Program
Files\LLVM\bin\clang.exe 0x1819d61
#14 0x00007ff64b3e349a C:\Program Files\LLVM\bin\clang.exe 0x181f55d C:\Program
Files\LLVM\bin\clang.exe 0x33cbc3f
#15 0x00007ff64b3e349a C:\Program Files\LLVM\bin\clang.exe 0x33c9719 C:\Program
Files\LLVM\bin\clang.exe 0x275b465
#16 0x00007ff64b3e349a C:\Program Files\LLVM\bin\clang.exe 0x1cb3492 C:\Program
Files\LLVM\bin\clang.exe 0x1c771cf
#17 0x00007ff64b3e349a C:\Program Files\LLVM\bin\clang.exe 0x1d09c87 C:\Program
Files\LLVM\bin\clang.exe 0x6e87
#18 0x00007ff64b3e349a C:\Program Files\LLVM\bin\clang.exe 0x4564 C:\Program
Files\LLVM\bin\clang.exe 0x33dda20
```

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