FUNCTION-LAMBDA-EXPRESSION returns the lambda expression if SBCL has access to it -- which is the case for inlined functions.
For others saving the lambda-expression has historically been deemed too costly in terms of space.
That said, it may be time to revisit that assumption, or possibly add a parameter or declaration to control source-saving. (Or use an external source database.)
FUNCTION- LAMBDA- EXPRESSION returns the lambda expression if SBCL has access to it -- which is the case for inlined functions.
For others saving the lambda-expression has historically been deemed too costly in terms of space.
That said, it may be time to revisit that assumption, or possibly add a parameter or declaration to control source-saving. (Or use an external source database.)