[LLVMbugs] [Bug 23110] New: ICE when using malformed raw string literal as default parameter

[bugzilla-daemon at llvm.org]

https://llvm.org/bugs/show_bug.cgi?id=23110

            Bug ID: 23110
           Summary: ICE when using malformed raw string literal as default
                    parameter
           Product: new-bugs
           Version: 3.6
          Hardware: PC
                OS: Linux
            Status: NEW
          Severity: normal
          Priority: P
         Component: new bugs
          Assignee: unassignedbugs at nondot.org
          Reporter: adamschwalm at gmail.com
                CC: llvmbugs at cs.uiuc.edu
    Classification: Unclassified

Created attachment 14142
  --> https://llvm.org/bugs/attachment.cgi?id=14142&action=edit
stack trace for the sample program

When using a malformed raw string literal as a default argument to a member
function template, an internal compiler error occurs. LLVM installed from the
arch linux packages.

Here is a small example case, named test1.cpp and compiled with 'clang++
-std=c++11 test1.cpp' it produces the attached stacktrace:

#include <regex>
#include <string>

struct S {
    template <typename T>
    void foo(std::string s = R"\S+") {}
};

int main() { S{}.foo<int>(); }

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