Crash stemming from typo correction when compiling template subclass

[llvmbot]

Bugzilla Link	10883
Resolution	FIXED
Resolved on	Sep 07, 2011 15:27
Version	trunk
OS	Linux
Reporter	LLVM Bugzilla Contributor
CC	@DougGregor

Extended Description

The following code causes clang to crash due to a NULL Decl pointer:

template
class Base {
public:
typedef long Container;
};

template
class Derived : public Base {
public:
using Base::Container;

void foo(const Container& current);
};

The crash is at SemaDecl.cpp:310

309 NamedDecl *Result = Corrected.getCorrectionDecl();
310 if ((isa(Result) || isa(Result)) &&
311 !Result->isInvalidDecl()) {

(gdb) p Result
$1 = (clang::NamedDecl *) 0x0

Simply put, this is a situation where Sema::CorrectTypo returns a non-keyword correction without an associated NamedDecl.

[llvmbot]

The fix and test case have been committed as r139252.