Inline expansion of ITERATOR+976 tries to refer to a dead LAMBDA-VAR ITERATOR+977 of varargs entry, which was substituted with ITERATOR+977 of &OPTIONAL processor. Thus the referenced variable is dead and is not bound anywhere.
The attached patch fixes the problem by giving up on inline expansion if it tries to make a reference to a dead LAMBDA-VAR, similar to the way dead BLOCK tags are treated.
Inline expansion of ITERATOR+976 tries to refer to a dead LAMBDA-VAR ITERATOR+977 of varargs entry, which was substituted with ITERATOR+977 of &OPTIONAL processor. Thus the referenced variable is dead and is not bound anywhere.
The attached patch fixes the problem by giving up on inline expansion if it tries to make a reference to a dead LAMBDA-VAR, similar to the way dead BLOCK tags are treated.