d: Merge upstream dmd 4d07f22f2, druntime f89da313, phobos d46814c86.

D front-end changes:

    - `scope' semantics are now enforced in `@safe' code on pointers to
      stack memory, but only as deprecation warnings.
    - Overriding virtual functions are now marked with the `override'
      and `final' in the generated headers of `-fdump-c++-spec='.
    - `-fpreview=fiximmmutableconv` has been added that disallows
      implicitly converting a return value with indirections to
      immutable if it determines the result must be unique.

D runtime changes:

    - Posix (excluding Darwin): Switch default GC signals from SIGUSR1/2
      to SIGRTMIN/SIGRTMIN+1

Phobos changes:

    - Import latest bug fixes to mainline.

gcc/d/ChangeLog:

	* dmd/MERGE: Merge upstream dmd 4d07f22f2
	* d-lang.cc (d_handle_option): Handle OPT_fpreview_fiximmutableconv.
	* lang.opt (fpreview=fiximmutableconv): New option.
	* runtime.def (ARRAYAPPENDT): Remove.

libphobos/ChangeLog:

	* libdruntime/MERGE: Merge upstream druntime f89da313.
	* src/MERGE: Merge upstream phobos d46814c86.

Signed-off-by: Iain Buclaw <ibuclaw@gdcproject.org>

4 files changed, 7 insertions, 5 deletions

diff --git a/libphobos/src/MERGE b/libphobos/src/MERGE
index 3de142fe009..ddf730ef333 100644
--- a/libphobos/src/MERGE
+++ b/libphobos/src/MERGE
@@ -1,4 +1,4 @@
-3a1cd9a01479155958c7799e573e55a93dd189a0
+d46814c86392007ebb4fb73cb684ef9e8caa605a
 
 The first line of this file holds the git revision number of the last
 merge done from the dlang/phobos repository.
diff --git a/libphobos/src/std/package.d b/libphobos/src/std/package.d
index a1d04444d62..bfb135b1885 100644
--- a/libphobos/src/std/package.d
+++ b/libphobos/src/std/package.d
@@ -35,6 +35,7 @@ public import
  std.base64,
  std.bigint,
  std.bitmanip,
+ std.checkedint,
  std.compiler,
  std.complex,
  std.concurrency,
@@ -50,6 +51,7 @@ public import
  std.format,
  std.functional,
  std.getopt,
+ std.int128,
  std.json,
  std.math,
  std.mathspecial,
diff --git a/libphobos/src/std/process.d b/libphobos/src/std/process.d
index 28bfb049c2b..d4fe8a1c7e8 100644
--- a/libphobos/src/std/process.d
+++ b/libphobos/src/std/process.d
@@ -613,7 +613,7 @@ private:
  * writefln("Current process ID: %d", thisProcessID);
  * ---
  */
-@property int thisProcessID() @trusted nothrow //TODO: @safe
+@property int thisProcessID() @trusted nothrow @nogc //TODO: @safe
 {
     version (Windows)    return GetCurrentProcessId();
     else version (Posix) return core.sys.posix.unistd.getpid();
@@ -632,7 +632,7 @@ private:
  * writefln("Current thread ID: %s", thisThreadID);
  * ---
  */
-@property ThreadID thisThreadID() @trusted nothrow //TODO: @safe
+@property ThreadID thisThreadID() @trusted nothrow @nogc //TODO: @safe
 {
     version (Windows)
         return GetCurrentThreadId();
diff --git a/libphobos/src/std/utf.d b/libphobos/src/std/utf.d
index f0200ce7052..d22dac8b15d 100644
--- a/libphobos/src/std/utf.d
+++ b/libphobos/src/std/utf.d
@@ -4275,10 +4275,10 @@ private int impureVariable;
  *                            UseReplacementDchar.no means throw `UTFException` for invalid UTF
  *
  * Throws:
- *      `UTFException` if invalid UTF sequence and `useReplacementDchar` is set to `UseReplacementDchar.yes`
+ *      `UTFException` if invalid UTF sequence and `useReplacementDchar` is set to `UseReplacementDchar.no`
  *
  * GC:
- *      Does not use GC if `useReplacementDchar` is set to `UseReplacementDchar.no`
+ *      Does not use GC if `useReplacementDchar` is set to `UseReplacementDchar.yes`
  *
  * Returns:
  *      A bidirectional range if `R` is a bidirectional range and not auto-decodable,