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[Sema] Null check in BuildDeclarationNameExpr 

Qualtype may point to null if we cannot infer its type yet.

Fixes PR33843

Differential Revision: https://reviews.llvm.org/D38158

llvm-svn: 314124
This commit is contained in:
Yi Kong 2017-09-25 17:36:54 +00:00
parent a23c1a37d0
commit 3103896914
2 changed files with 5 additions and 1 deletions
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2
clang/lib/Sema/SemaExpr.cpp
View File

@ -2803,6 +2803,8 @@ ExprResult Sema::BuildDeclarationNameExpr(
{
QualType type = VD->getType();
if (type.isNull())
return ExprError();
if (auto *FPT = type->getAs<FunctionProtoType>()) {
// C++ [except.spec]p17:
// An exception-specification is considered to be needed when:

4
clang/test/SemaCXX/typo-correction-crash.cpp
View File

@ -1,4 +1,4 @@
// RUN: %clang_cc1 -fsyntax-only -std=c++14 -verify %s
// RUN: %clang_cc1 -fsyntax-only -std=c++17 -verify %s
auto check1() {
return 1;
return s; // expected-error {{use of undeclared identifier 's'}}
@ -19,3 +19,5 @@ struct FooRecord { };
FooRecord::NestedNamespace::type x; // expected-error {{no member named 'NestedNamespace' in 'FooRecord'; did you mean 'BarNamespace::NestedNamespace'?}}
void cast_expr(int g) { +int(n)(g); } // expected-error {{undeclared identifier 'n'}}
void bind() { for (const auto& [test,_] : _test_) { }; } // expected-error {{undeclared identifier '_test_'}}