Shape information allows the linker to check the importing
module's compile-time expectation against the run-time
value of its imports. The JIT, in turn, can rely on that
checking to better inline structure-type predicates, etc.,
and to more directy call JIT-generated code across
module boundaries.
In addition to checking the "shape" of an import, the import's
JITted vs. non-JITted state must be consistent. To prevent shifts
in JIT state, the `eval-jit-enabled' parameter is now restricted
in its effect to top-level bindings.
Updated example for for/digits to avoid confusion: it's not clear
otherwise that the intentional syntax error wasn't just a casual
mistake.
Added an example for sequence-add-between.
Turn use of a finalized ffi callout into a reported error,
instead of a crash. Clarify the existence of the finalizer
in the docs. Fix error logging of the finalizer thread.
Merge to v5.3.1
Bytecode changes in two small ways to help the validator:
* a cross-module variable reference preserves the compiler's
annotation on whether the reference is constant, fixed, or other
* lifted procedures now appear in the module body just before the
definitions that use them, instead of at the beginning of the
module body
The new argument gets to chaperone/impersonate a guard at
the prompt, and it is applied when the continuation is applied ---
based on a wrapper on th prompt tag of the continuation (as opposed to
the prompt tag of the prompt).
The new argument gets to filter results that come from a
non-composable continuation that replaces one delimited
by a prompt using the chaperoned/impersonated prompt tag.
* Stamp "plt-index.js" with the path of its generator.
* Fix most of the "use strict" and js2-mode warnings in scribble's
JavaScript.
* Some code improvements in the generating code too.
(With some edits by Eli.)
