[llvm-bugs] [Bug 47875] New: Compiler segfaults when compiling a file with a user-defined deduction guide for a nested class

[via llvm-bugs]

https://bugs.llvm.org/show_bug.cgi?id=47875

            Bug ID: 47875
           Summary: Compiler segfaults when compiling a file with a
                    user-defined deduction guide for a nested class
           Product: clang
           Version: 11.0
          Hardware: PC
                OS: FreeBSD
            Status: NEW
          Severity: enhancement
          Priority: P
         Component: C++17
          Assignee: unassignedclangbugs at nondot.org
          Reporter: dfr at rabson.org
                CC: blitzrakete at gmail.com, erik.pilkington at gmail.com,
                    llvm-bugs at lists.llvm.org, richard-llvm at metafoo.co.uk

Stack dump:
0.      Program arguments: /usr/local/llvm11/bin/clang++ -cc1 -triple
x86_64-portbld-freebsd12.1 -emit-obj -mrelax-all -disable-free
-disable-llvm-verifier -discard-value-names -main-file-name bug.cpp
-mrelocation-model static -mframe-pointer=all -fno-rounding-math
-mconstructor-aliases -munwind-tables -target-cpu x86-64
-fno-split-dwarf-inlining -debug-info-kind=standalone -dwarf-version=4
-debugger-tuning=gdb -resource-dir /usr/local/llvm11/lib/clang/11.0.0
-internal-isystem /usr/include/c++/v1 -std=c++17 -fdeprecated-macro
-fdebug-compilation-dir /home/dfr/src/clang-bug -ferror-limit 19
-fgnuc-version=4.2.1 -fcxx-exceptions -fexceptions -fcolor-diagnostics
-faddrsig -o /tmp/bug-2b41fa.o -x c++ bug.cpp
1.      bug.cpp:35:72: current parser token ';'
2.      bug.cpp:23:1: parsing struct/union/class body 'log'
#0 0x00000008056bb666 llvm::sys::PrintStackTrace(llvm::raw_ostream&)
(/usr/local/llvm11/lib/libLLVM-11.so+0x24bb666)
#1 0x00000008056b97e5 llvm::sys::RunSignalHandlers()
(/usr/local/llvm11/lib/libLLVM-11.so+0x24b97e5)
#2 0x00000008056bbef1 (/usr/local/llvm11/lib/libLLVM-11.so+0x24bbef1)
#3 0x000000080027a3b0 handle_signal /usr/src/lib/libthr/thread/thr_sig.c:0:3
clang++: error: unable to execute command: Segmentation fault (core dumped)
clang++: error: clang frontend command failed due to signal (use -v to see
invocation)
clang version 11.0.0
Target: x86_64-portbld-freebsd12.1
Thread model: posix
InstalledDir: /usr/local/llvm11/bin
clang++: note: diagnostic msg:
********************

PLEASE ATTACH THE FOLLOWING FILES TO THE BUG REPORT:
Preprocessed source(s) and associated run script(s) are located at:
clang++: note: diagnostic msg: /tmp/bug-c11b99.cpp
clang++: note: diagnostic msg: /tmp/bug-c11b99.sh
clang++: note: diagnostic msg:

********************

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