re PR c++/71570 (ICE on invalid variable capture in cxx_incomplete_type_diagnostic, at cp/typeck2.c:55)

/cp
2017-07-26  Paolo Carlini  <paolo.carlini@oracle.com>

	PR c++/71570
	* lambda.c (add_capture): Early return if we cannot capture by
	reference.

/testsuite
2017-07-26  Paolo Carlini  <paolo.carlini@oracle.com>

	PR c++/71570
	* g++.dg/cpp0x/lambda/lambda-ice17.C: New.

From-SVN: r250591