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    <head>
      <base href="https://bugs.llvm.org/">
    </head>
    <body><table border="1" cellspacing="0" cellpadding="8">
        <tr>
          <th>Bug ID</th>
          <td><a class="bz_bug_link 
          bz_status_NEW "
   title="NEW - n CodeGen::CodeGenFunction::EmitCallArgs: Assertion `[...] && "type mismatch in call argument!"' failed"
   href="https://bugs.llvm.org/show_bug.cgi?id=49834">49834</a>
          </td>
        </tr>

        <tr>
          <th>Summary</th>
          <td>n CodeGen::CodeGenFunction::EmitCallArgs: Assertion `[...] && "type mismatch in call argument!"' failed
          </td>
        </tr>

        <tr>
          <th>Product</th>
          <td>clang
          </td>
        </tr>

        <tr>
          <th>Version</th>
          <td>11.0
          </td>
        </tr>

        <tr>
          <th>Hardware</th>
          <td>PC
          </td>
        </tr>

        <tr>
          <th>OS</th>
          <td>Windows NT
          </td>
        </tr>

        <tr>
          <th>Status</th>
          <td>NEW
          </td>
        </tr>

        <tr>
          <th>Severity</th>
          <td>enhancement
          </td>
        </tr>

        <tr>
          <th>Priority</th>
          <td>P
          </td>
        </tr>

        <tr>
          <th>Component</th>
          <td>C++
          </td>
        </tr>

        <tr>
          <th>Assignee</th>
          <td>unassignedclangbugs@nondot.org
          </td>
        </tr>

        <tr>
          <th>Reporter</th>
          <td>zahira.ammarguellat@intel.com
          </td>
        </tr>

        <tr>
          <th>CC</th>
          <td>blitzrakete@gmail.com, dgregor@apple.com, erik.pilkington@gmail.com, llvm-bugs@lists.llvm.org, richard-llvm@metafoo.co.uk
          </td>
        </tr></table>
      <p>
        <div>
        <pre>This test case:

template<typename = int>
void f (const char* a =
        ([](int = [] {
                    static int i; return 42;
                  }()) {
           static int i; return "";
         }()));

void g() {
  f();
}

compiles with clang 10.0. See <a href="https://godbolt.org/z/eEbW6Gnjf">https://godbolt.org/z/eEbW6Gnjf</a> 
and fails with an assertion. See <a href="https://godbolt.org/z/41GbzPa4Y">https://godbolt.org/z/41GbzPa4Y</a> 

Assertion failed: (isGenericMethod || Ty->isVariablyModifiedType() ||
Ty.getNonReferenceType()->isObjCRetainableType() || getContext()
.getCanonicalType(Ty.getNonReferenceType()) .getTypePtr() ==
getContext().getCanonicalType((*Arg)->getType()).getTypePtr()) && "type
mismatch in call argument!", file CGCall.cpp, line 4072</pre>
        </div>
      </p>


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