https://gcc.gnu.org/bugzilla/show_bug.cgi?id=86943
--- Comment #12 from Jason Merrill <jason at gcc dot gnu.org> --- Author: jason Date: Wed Jan 30 02:43:04 2019 New Revision: 268377 URL: https://gcc.gnu.org/viewcvs?rev=268377&root=gcc&view=rev Log: PR c++/86943 - wrong code converting lambda to function pointer. In this PR, instantiating the static thunk returned from the generic lambda conversion function template was using normal overload resolution, which meant calling an extra constructor when forwarding its argument. Fixed by special-casing thunk calls significantly more. * lambda.c (maybe_add_lambda_conv_op): Use a template-id in the call. Only forward parms for decltype. * pt.c (tsubst_copy_and_build) [CALL_EXPR]: Handle CALL_FROM_THUNK_P specially. * typeck.c (check_return_expr): Don't mess with a thunk call. Added: trunk/gcc/testsuite/g++.dg/cpp0x/lambda/lambda-conv13.C Modified: trunk/gcc/cp/ChangeLog trunk/gcc/cp/lambda.c trunk/gcc/cp/pt.c trunk/gcc/cp/typeck.c
