[cfe-dev] SIGSEGV in call to Sema::PerformPendingInstantiations() in Clang 3.2
thonermann at coverity.com
Mon May 6 15:09:54 PDT 2013
On 05/06/2013 05:38 PM, Richard Smith wrote:
> On Mon, May 6, 2013 at 2:07 PM, Tom Honermann <thonermann at coverity.com
> <mailto:thonermann at coverity.com>> wrote:
> This email describes a SIGSEGV I'm experiencing with Clang 3.2 when
> calling Sema::__PerformPendingInstantiations()__. A patch against
> latest SVN is attached which resolves the SIGSEGV. However, it
> appears that the call to Sema::__PerformPendingInstantiations() is
> resulting in a call to Sema::getCurScope() which, according to its
> comments, should never be called during template instantiation. The
> purpose of this email is to:
> 1) Request that the attached patch be applied to SVN. The patch is
> trivial - it just adds missing initialization of the Sema::CurScope
> pointer within the Sema constructor.
> Thanks, patch committed as r181251. If you have any way of testing this
> without building an additional binary, I'd appreciate it!
I briefly tried a few different ways to tickle this gremlin, but didn't
find a clang invocation that didn't create a Parser instance. I'll
admit, I didn't look hard though.
> 2) Clarify whether the eventual call into Sema::getCurScope() from
> within Sema::__PerformPendingInstantiations() represents an
> additional bug which should be addressed.
> Generally, yes, but getScopeForContext is always allowed to call
Excellent, thanks for the clarification!
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