In a minor collection, old-generation pages can be ignored for
the fixup pass. Also, the "moved" bit implies the "marked" bit.
Also, move the mark bits to low and the hash bits to high,
which leads to slightly better generated code for the GC.
The validator was not as smart as the compiler in determining
that a `let' expression could be relied on to produce a
constant-shaped function (without side effect or error) in the case
that a right-hand side expression is a call to a known structure
constructor or predicate.
Closes PR 13679
Merge to v5.3.4
Swap order of argument for `environment-variables-get'
and `environment-variables-set!', so that the environment
variables come first --- which follows the usual order.
This change means that the parameter isn't used to get
the default environment variables, but that seems ok; the
convenient interface is `getenv' and `putenv'.
On Windows, case-normalized environment variable names.
Also, change the implementation to use an immutable hash
internally.
Fix ephemeral-port support in `udp-bind!', and
change `udp-bind!' and `udp-connect!' to try address
resolutions in order to find one that works (which is
typically needed to auto-select an IPv4 or IPv6 variant
of an address).
By default, a sandbox gets a fresh environment variable set,
which means that it does not affect environment variables
outside the sandbox (which means that sandboxed code cannot
set the Racket process's OS-level environment variables).
Closes PR 13667
The `current-environment-variables' parameter determines the current
mutable "environment variable set". If that set is the initial one for
a Racket process, then using the set corresponds to working with OS
environment variables. Otherwise, it's really just a hash table that
is packaged up as OS environment variables if a subprocess is created.
The new environment-variable interface works in terms of bytes, instead
of assuming that environment variable names and values fit in a string
encoding.
The string-based `getenv' and `putenv' are still available as
convenience wrappers. The checking on environment-variable names
for those wrappers is a little tighter, preventing any attempt to use a
name that contains "=".
A symptom of mismatched `for-label' imports was that searching for "<="
would show red-underlined links to the `plai/{gc2/}mutator' documentation.
Merge to v5.3.4
When places are not enabled, then `raco setup' uses multiple
Racket processes that commuincate via pipes. Don't try to send
a place channel over a pipe.
Merge to v5.3.4
The code duplication was there only to support
constructing the name for the optimized contract;
instead we actually just built the name as we go
(the old version actually built the old contract
and then used that to get the name)
also:
- racket/contract/base now requires basic-opters.rkt
so all of the opters are registered when racket/contract/base
is loaded, not just the non-basic ones
- fix the ordering of the names of subcontracts in or/c
- make opt-contracts print a more meaningful name
