[llvm-bugs] [Bug 35560] New: Clang 5.0 crashes during constexpr evaluation

via llvm-bugs llvm-bugs at lists.llvm.org
Thu Dec 7 06:11:33 PST 2017 

https://bugs.llvm.org/show_bug.cgi?id=35560

            Bug ID: 35560
           Summary: Clang 5.0 crashes during constexpr evaluation
           Product: clang
           Version: 5.0
          Hardware: PC
                OS: Windows NT
            Status: NEW
          Severity: normal
          Priority: P
         Component: -New Bugs
          Assignee: unassignedclangbugs at nondot.org
          Reporter: littlesnorrboy at gmail.com
                CC: llvm-bugs at lists.llvm.org

Created attachment 19525
  --> https://bugs.llvm.org/attachment.cgi?id=19525&action=edit
Files dumped by clang

Hi

I attempted to do https://adventofcode.com/2017/day/3 part 2 using only
constexpr.


Compiling and running the code without compile time evaluation 
aka. 
...
    auto result = solve(11);
...

works as expected.
However when I force compile time evaluation
...
    constexpr auto result = solve(11);
...
The compiler crashes.

On GCC 7.2 it compiles as expected.

Link to the source code (see day3.cpp)
https://github.com/snorrwe/advent-2017/tree/master/day3

Link to compiler explorer: https://godbolt.org/g/MqnpCA

See the attachments for the dumped files.

////////////////////////////////////////////////////

Full error message:


clang version 5.0.0 (tags/RELEASE_500/final)
Target: x86_64-pc-windows-msvc
Thread model: posix
InstalledDir: C:\Program Files\LLVM\bin
 "C:\\Program Files\\LLVM\\bin\\clang++.exe" -cc1 -triple
x86_64-pc-windows-msvc19.11.25547 -emit-obj -mincremental-linker-compatible
-disable-free -disable-llvm-verifier -discard-value-names -main-file-name
day3.cpp -mrelocation-model pic -pic-level 2 -mthread-model posix -fmath-errno
-masm-verbose -mconstructor-aliases -munwind-tables -target-cpu x86-64
-momit-leaf-frame-pointer -v -dwarf-column-info -debugger-tuning=gdb
-resource-dir "C:\\Program Files\\LLVM\\lib\\clang\\5.0.0" -internal-isystem
"C:\\Program Files\\LLVM\\lib\\clang\\5.0.0\\include" -internal-isystem
"C:\\Program Files (x86)\\Microsoft Visual
Studio\\2017\\Community\\VC\\Tools\\MSVC\\14.11.25503\\include"
-internal-isystem "C:\\Program Files (x86)\\Windows
Kits\\10\\Include\\10.0.16299.0\\ucrt" -internal-isystem "C:\\Program Files
(x86)\\Windows Kits\\10\\include\\10.0.16299.0\\shared" -internal-isystem
"C:\\Program Files (x86)\\Windows Kits\\10\\include\\10.0.16299.0\\um"
-internal-isystem "C:\\Program Files (x86)\\Windows
Kits\\10\\include\\10.0.16299.0\\winrt" -O3 -std=c++1z -fdeprecated-macro
-fdebug-compilation-dir "C:\\Users\\Frenetiq\\Documents\\GitHub\\advent\\day3"
-ferror-limit 19 -fmessage-length 230 -fms-extensions -fms-compatibility
-fms-compatibility-version=19.11.25547 -fdelayed-template-parsing
-fobjc-runtime=gcc -fcxx-exceptions -fexceptions -fdiagnostics-show-option
-fcolor-diagnostics -vectorize-loops -vectorize-slp -o
"C:\\Users\\Frenetiq\\AppData\\Local\\Temp\\day3-eadc82.o" -x c++ day3.cpp
clang -cc1 version 5.0.0 based upon LLVM 5.0.0 default target
x86_64-pc-windows-msvc
#include "..." search starts here:
#include <...> search starts here:
 C:\Program Files\LLVM\lib\clang\5.0.0\include
 C:\Program Files (x86)\Microsoft Visual
Studio\2017\Community\VC\Tools\MSVC\14.11.25503\include
 C:\Program Files (x86)\Windows Kits\10\Include\10.0.16299.0\ucrt
 C:\Program Files (x86)\Windows Kits\10\include\10.0.16299.0\shared
 C:\Program Files (x86)\Windows Kits\10\include\10.0.16299.0\um
 C:\Program Files (x86)\Windows Kits\10\include\10.0.16299.0\winrt
End of search list.
Wrote crash dump file
"C:\Users\Frenetiq\AppData\Local\Temp\clang++.exe-174568.dmp"
0x00007FF6BFA64A20 (0x00000062BB984868 0x000002381A1F3E10 0x0000000000000000
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0x000090EC00000040)
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0x00000062BB984BE0)
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0x00000062BB985530)
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0x0000000000000000)
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0x00007FF6BFA75302 (0x00000062BB988780 0x00007FF6BFA43E27 0x00000062BB988788
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0x00007FF6BFA75302 (0x000002381A232840 0x000002381A2342F0 0x00000062BB988A60
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0x00007FF6BFA6237F (0x0000023800000000 0x000002381A233AC0 0x00000062BB988CE0
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0x00007FF6BF2B03EB (0x0000023819279FB0 0x0000000000000000 0x000002381752B758
0x0000000000000002)
0x00007FF6BF2AE8A2 (0x0000000000000002 0x0000023817529AE0 0x00000062BB98BA38
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0x00000238175250C0)
0x00007FF6BF06FE9B (0x00000062BB98CA10 0x0000000000000000 0x0000000000000000
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0x00007FF6BF09F623 (0x01000062BB98CB20 0x0000023800000001 0x000090EDB39AF83C
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0x00007FF6BF031976 (0x00000238174EC730 0x00007FF6BFD1EA77 0x0000000000000000
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0x00007FF6BF0305E4 (0x0000000000000000 0x00007FFAD9D00F20 0x0000000000000000
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0x00007FF6BF02D496 (0x0000000000000000 0x0000000000000000 0x000002381745DA10
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0x00007FF6BEA9AD2A (0x00007FFA00000012 0x00007FF600000000 0x0000000000000009
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0x00007FF6BEA66AD0 (0x00000062BB98E088 0x00007FF6BEA6168B 0x000002381745FAE0
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0x00007FF6BD3C5EAB (0x0000000000000042 0x0000000000000016 0x00000238174735D0
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0x00007FF6BFD405E9 (0x0000000000000000 0x0000000000000000 0x0000000000000000
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0x00007FFAD7482774 (0x0000000000000000 0x0000000000000000 0x0000000000000000
0x0000000000000000), BaseThreadInitThunk() + 0x14 bytes(s)
0x00007FFAD9D40D51 (0x0000000000000000 0x0000000000000000 0x0000000000000000
0x0000000000000000), RtlUserThreadStart() + 0x21 bytes(s)
clang++.exe: error: clang frontend command failed due to signal (use -v to see
invocation)
clang version 5.0.0 (tags/RELEASE_500/final)
Target: x86_64-pc-windows-msvc
Thread model: posix
InstalledDir: C:\Program Files\LLVM\bin
clang++.exe: note: diagnostic msg: PLEASE submit a bug report to
http://llvm.org/bugs/ and include the crash backtrace, preprocessed source, and
associated run script.
clang++.exe: note: diagnostic msg:

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