================
@@ -4692,6 +4692,17 @@ bool Sema::InstantiateDefaultArgument(SourceLocation
CallLoc, FunctionDecl *FD,
ParmVarDecl *Param) {
assert(Param->hasUninstantiatedDefaultArg());
+ // FIXME: We don't track member specialization info for non-defining
+ // friend declarations, so we will not be able to later find the function
+ // pattern. As a workaround, don't instantiate the default argument in this
+ // case. This is correct per wording and only an error recovery issue, as per
----------------
erichkeane wrote:
I'm not sure I get the FIXME here, if the reason for keeping this around would
be improved error recovery/recovery-expr, should we just be producing one of
those instead? If not, what anticipated action do we have here to fix this in
the future? And what would be the benefit?
https://github.com/llvm/llvm-project/pull/115487
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