d: Merge upstream dmd, druntime 643b1261bb, phobos 1c98326e7

D front-end changes:

    - Suggested preview switches now give gdc flags (PR109681).
    - `new S[10]' is now lowered to `_d_newarrayT!S(10)'.

D runtime changes:

    - Runtime compiler library functions `_d_newarrayU', `_d_newarrayT',
      `_d_newarrayiT' have been converted to templates.

Phobos changes:

    - Add new `std.traits.Unshared' template.

gcc/d/ChangeLog:

	* dmd/MERGE: Merge upstream dmd 643b1261bb.
	* d-attribs.cc (build_attributes): Update for new front-end interface.
	* d-lang.cc (d_post_options): Likewise.
	* decl.cc (layout_class_initializer): Likewise.

libphobos/ChangeLog:

	* libdruntime/MERGE: Merge upstream druntime 643b1261bb.
	* libdruntime/Makefile.am (DRUNTIME_DSOURCES_FREEBSD): Add
	core/sys/freebsd/ifaddrs.d, core/sys/freebsd/net/if_dl.d,
	core/sys/freebsd/sys/socket.d, core/sys/freebsd/sys/types.d.
	(DRUNTIME_DSOURCES_LINUX): Add core/sys/linux/linux/if_arp.d,
	core/sys/linux/linux/if_packet.d.
	* libdruntime/Makefile.in: Regenerate.
	* src/MERGE: Merge upstream phobos 1c98326e7.

9 files changed, 542 insertions, 16 deletions

diff --git a/libphobos/libdruntime/MERGE b/libphobos/libdruntime/MERGE
index 2a0baf0..235db4b 100644
--- a/libphobos/libdruntime/MERGE
+++ b/libphobos/libdruntime/MERGE
@@ -1,4 +1,4 @@
-e48bc0987dfec35bc76a3015ee3e85906ce86dfd
+643b1261bba0757d97efa3ff1f63e461271eb000
 
 The first line of this file holds the git revision number of the last
 merge done from the dlang/dmd repository.
diff --git a/libphobos/libdruntime/Makefile.am b/libphobos/libdruntime/Makefile.am
index f57c640..23205fd 100644
--- a/libphobos/libdruntime/Makefile.am
+++ b/libphobos/libdruntime/Makefile.am
@@ -261,7 +261,8 @@ DRUNTIME_DSOURCES_ELF = core/sys/elf/package.d
 
 DRUNTIME_DSOURCES_FREEBSD = core/sys/freebsd/config.d \
 	core/sys/freebsd/dlfcn.d core/sys/freebsd/err.d \
-	core/sys/freebsd/execinfo.d core/sys/freebsd/netinet/in_.d \
+	core/sys/freebsd/execinfo.d core/sys/freebsd/ifaddrs.d \
+	core/sys/freebsd/net/if_dl.d core/sys/freebsd/netinet/in_.d \
 	core/sys/freebsd/pthread_np.d core/sys/freebsd/stdlib.d \
 	core/sys/freebsd/string.d core/sys/freebsd/sys/_bitset.d \
 	core/sys/freebsd/sys/_cpuset.d core/sys/freebsd/sys/cdefs.d \
@@ -269,7 +270,8 @@ DRUNTIME_DSOURCES_FREEBSD = core/sys/freebsd/config.d \
 	core/sys/freebsd/sys/elf64.d core/sys/freebsd/sys/elf_common.d \
 	core/sys/freebsd/sys/event.d core/sys/freebsd/sys/link_elf.d \
 	core/sys/freebsd/sys/mman.d core/sys/freebsd/sys/mount.d \
-	core/sys/freebsd/sys/sysctl.d core/sys/freebsd/time.d \
+	core/sys/freebsd/sys/socket.d core/sys/freebsd/sys/sysctl.d \
+	core/sys/freebsd/sys/types.d core/sys/freebsd/time.d \
 	core/sys/freebsd/unistd.d
 
 DRUNTIME_DSOURCES_LINUX = core/sys/linux/config.d \
@@ -278,6 +280,7 @@ DRUNTIME_DSOURCES_LINUX = core/sys/linux/config.d \
 	core/sys/linux/fcntl.d core/sys/linux/fs.d core/sys/linux/ifaddrs.d \
 	core/sys/linux/input.d core/sys/linux/input_event_codes.d \
 	core/sys/linux/io_uring.d core/sys/linux/link.d \
+	core/sys/linux/linux/if_arp.d core/sys/linux/linux/if_packet.d \
 	core/sys/linux/netinet/in_.d core/sys/linux/netinet/tcp.d \
 	core/sys/linux/perf_event.d core/sys/linux/sched.d \
 	core/sys/linux/stdio.d core/sys/linux/string.d \
diff --git a/libphobos/libdruntime/Makefile.in b/libphobos/libdruntime/Makefile.in
index 363a4a0..410245d 100644
--- a/libphobos/libdruntime/Makefile.in
+++ b/libphobos/libdruntime/Makefile.in
@@ -327,6 +327,7 @@ am__objects_11 = core/sys/bionic/err.lo core/sys/bionic/fcntl.lo \
 @DRUNTIME_OS_ANDROID_TRUE@am__objects_12 = $(am__objects_11)
 am__objects_13 = core/sys/freebsd/config.lo core/sys/freebsd/dlfcn.lo \
 	core/sys/freebsd/err.lo core/sys/freebsd/execinfo.lo \
+	core/sys/freebsd/ifaddrs.lo core/sys/freebsd/net/if_dl.lo \
 	core/sys/freebsd/netinet/in_.lo core/sys/freebsd/pthread_np.lo \
 	core/sys/freebsd/stdlib.lo core/sys/freebsd/string.lo \
 	core/sys/freebsd/sys/_bitset.lo \
@@ -336,7 +337,8 @@ am__objects_13 = core/sys/freebsd/config.lo core/sys/freebsd/dlfcn.lo \
 	core/sys/freebsd/sys/elf_common.lo \
 	core/sys/freebsd/sys/event.lo core/sys/freebsd/sys/link_elf.lo \
 	core/sys/freebsd/sys/mman.lo core/sys/freebsd/sys/mount.lo \
-	core/sys/freebsd/sys/sysctl.lo core/sys/freebsd/time.lo \
+	core/sys/freebsd/sys/socket.lo core/sys/freebsd/sys/sysctl.lo \
+	core/sys/freebsd/sys/types.lo core/sys/freebsd/time.lo \
 	core/sys/freebsd/unistd.lo
 @DRUNTIME_OS_FREEBSD_TRUE@am__objects_14 = $(am__objects_13)
 am__objects_15 = core/sys/netbsd/dlfcn.lo core/sys/netbsd/err.lo \
@@ -366,6 +368,8 @@ am__objects_19 = core/sys/linux/config.lo core/sys/linux/dlfcn.lo \
 	core/sys/linux/fs.lo core/sys/linux/ifaddrs.lo \
 	core/sys/linux/input.lo core/sys/linux/input_event_codes.lo \
 	core/sys/linux/io_uring.lo core/sys/linux/link.lo \
+	core/sys/linux/linux/if_arp.lo \
+	core/sys/linux/linux/if_packet.lo \
 	core/sys/linux/netinet/in_.lo core/sys/linux/netinet/tcp.lo \
 	core/sys/linux/perf_event.lo core/sys/linux/sched.lo \
 	core/sys/linux/stdio.lo core/sys/linux/string.lo \
@@ -931,7 +935,8 @@ DRUNTIME_DSOURCES_DRAGONFLYBSD = core/sys/dragonflybsd/dlfcn.d \
 DRUNTIME_DSOURCES_ELF = core/sys/elf/package.d
 DRUNTIME_DSOURCES_FREEBSD = core/sys/freebsd/config.d \
 	core/sys/freebsd/dlfcn.d core/sys/freebsd/err.d \
-	core/sys/freebsd/execinfo.d core/sys/freebsd/netinet/in_.d \
+	core/sys/freebsd/execinfo.d core/sys/freebsd/ifaddrs.d \
+	core/sys/freebsd/net/if_dl.d core/sys/freebsd/netinet/in_.d \
 	core/sys/freebsd/pthread_np.d core/sys/freebsd/stdlib.d \
 	core/sys/freebsd/string.d core/sys/freebsd/sys/_bitset.d \
 	core/sys/freebsd/sys/_cpuset.d core/sys/freebsd/sys/cdefs.d \
@@ -939,7 +944,8 @@ DRUNTIME_DSOURCES_FREEBSD = core/sys/freebsd/config.d \
 	core/sys/freebsd/sys/elf64.d core/sys/freebsd/sys/elf_common.d \
 	core/sys/freebsd/sys/event.d core/sys/freebsd/sys/link_elf.d \
 	core/sys/freebsd/sys/mman.d core/sys/freebsd/sys/mount.d \
-	core/sys/freebsd/sys/sysctl.d core/sys/freebsd/time.d \
+	core/sys/freebsd/sys/socket.d core/sys/freebsd/sys/sysctl.d \
+	core/sys/freebsd/sys/types.d core/sys/freebsd/time.d \
 	core/sys/freebsd/unistd.d
 
 DRUNTIME_DSOURCES_LINUX = core/sys/linux/config.d \
@@ -948,6 +954,7 @@ DRUNTIME_DSOURCES_LINUX = core/sys/linux/config.d \
 	core/sys/linux/fcntl.d core/sys/linux/fs.d core/sys/linux/ifaddrs.d \
 	core/sys/linux/input.d core/sys/linux/input_event_codes.d \
 	core/sys/linux/io_uring.d core/sys/linux/link.d \
+	core/sys/linux/linux/if_arp.d core/sys/linux/linux/if_packet.d \
 	core/sys/linux/netinet/in_.d core/sys/linux/netinet/tcp.d \
 	core/sys/linux/perf_event.d core/sys/linux/sched.d \
 	core/sys/linux/stdio.d core/sys/linux/string.d \
@@ -1593,6 +1600,11 @@ core/sys/freebsd/config.lo: core/sys/freebsd/$(am__dirstamp)
 core/sys/freebsd/dlfcn.lo: core/sys/freebsd/$(am__dirstamp)
 core/sys/freebsd/err.lo: core/sys/freebsd/$(am__dirstamp)
 core/sys/freebsd/execinfo.lo: core/sys/freebsd/$(am__dirstamp)
+core/sys/freebsd/ifaddrs.lo: core/sys/freebsd/$(am__dirstamp)
+core/sys/freebsd/net/$(am__dirstamp):
+	@$(MKDIR_P) core/sys/freebsd/net
+	@: > core/sys/freebsd/net/$(am__dirstamp)
+core/sys/freebsd/net/if_dl.lo: core/sys/freebsd/net/$(am__dirstamp)
 core/sys/freebsd/netinet/$(am__dirstamp):
 	@$(MKDIR_P) core/sys/freebsd/netinet
 	@: > core/sys/freebsd/netinet/$(am__dirstamp)
@@ -1617,7 +1629,9 @@ core/sys/freebsd/sys/link_elf.lo:  \
 	core/sys/freebsd/sys/$(am__dirstamp)
 core/sys/freebsd/sys/mman.lo: core/sys/freebsd/sys/$(am__dirstamp)
 core/sys/freebsd/sys/mount.lo: core/sys/freebsd/sys/$(am__dirstamp)
+core/sys/freebsd/sys/socket.lo: core/sys/freebsd/sys/$(am__dirstamp)
 core/sys/freebsd/sys/sysctl.lo: core/sys/freebsd/sys/$(am__dirstamp)
+core/sys/freebsd/sys/types.lo: core/sys/freebsd/sys/$(am__dirstamp)
 core/sys/freebsd/time.lo: core/sys/freebsd/$(am__dirstamp)
 core/sys/freebsd/unistd.lo: core/sys/freebsd/$(am__dirstamp)
 core/sys/netbsd/$(am__dirstamp):
@@ -1685,6 +1699,12 @@ core/sys/linux/input.lo: core/sys/linux/$(am__dirstamp)
 core/sys/linux/input_event_codes.lo: core/sys/linux/$(am__dirstamp)
 core/sys/linux/io_uring.lo: core/sys/linux/$(am__dirstamp)
 core/sys/linux/link.lo: core/sys/linux/$(am__dirstamp)
+core/sys/linux/linux/$(am__dirstamp):
+	@$(MKDIR_P) core/sys/linux/linux
+	@: > core/sys/linux/linux/$(am__dirstamp)
+core/sys/linux/linux/if_arp.lo: core/sys/linux/linux/$(am__dirstamp)
+core/sys/linux/linux/if_packet.lo:  \
+	core/sys/linux/linux/$(am__dirstamp)
 core/sys/linux/netinet/$(am__dirstamp):
 	@$(MKDIR_P) core/sys/linux/netinet
 	@: > core/sys/linux/netinet/$(am__dirstamp)
@@ -2055,12 +2075,16 @@ mostlyclean-compile:
 	-rm -f core/sys/elf/*.lo
 	-rm -f core/sys/freebsd/*.$(OBJEXT)
 	-rm -f core/sys/freebsd/*.lo
+	-rm -f core/sys/freebsd/net/*.$(OBJEXT)
+	-rm -f core/sys/freebsd/net/*.lo
 	-rm -f core/sys/freebsd/netinet/*.$(OBJEXT)
 	-rm -f core/sys/freebsd/netinet/*.lo
 	-rm -f core/sys/freebsd/sys/*.$(OBJEXT)
 	-rm -f core/sys/freebsd/sys/*.lo
 	-rm -f core/sys/linux/*.$(OBJEXT)
 	-rm -f core/sys/linux/*.lo
+	-rm -f core/sys/linux/linux/*.$(OBJEXT)
+	-rm -f core/sys/linux/linux/*.lo
 	-rm -f core/sys/linux/netinet/*.$(OBJEXT)
 	-rm -f core/sys/linux/netinet/*.lo
 	-rm -f core/sys/linux/sys/*.$(OBJEXT)
@@ -2231,9 +2255,11 @@ clean-libtool:
 	-rm -rf core/sys/dragonflybsd/sys/.libs core/sys/dragonflybsd/sys/_libs
 	-rm -rf core/sys/elf/.libs core/sys/elf/_libs
 	-rm -rf core/sys/freebsd/.libs core/sys/freebsd/_libs
+	-rm -rf core/sys/freebsd/net/.libs core/sys/freebsd/net/_libs
 	-rm -rf core/sys/freebsd/netinet/.libs core/sys/freebsd/netinet/_libs
 	-rm -rf core/sys/freebsd/sys/.libs core/sys/freebsd/sys/_libs
 	-rm -rf core/sys/linux/.libs core/sys/linux/_libs
+	-rm -rf core/sys/linux/linux/.libs core/sys/linux/linux/_libs
 	-rm -rf core/sys/linux/netinet/.libs core/sys/linux/netinet/_libs
 	-rm -rf core/sys/linux/sys/.libs core/sys/linux/sys/_libs
 	-rm -rf core/sys/netbsd/.libs core/sys/netbsd/_libs
@@ -2394,9 +2420,11 @@ distclean-generic:
 	-rm -f core/sys/dragonflybsd/sys/$(am__dirstamp)
 	-rm -f core/sys/elf/$(am__dirstamp)
 	-rm -f core/sys/freebsd/$(am__dirstamp)
+	-rm -f core/sys/freebsd/net/$(am__dirstamp)
 	-rm -f core/sys/freebsd/netinet/$(am__dirstamp)
 	-rm -f core/sys/freebsd/sys/$(am__dirstamp)
 	-rm -f core/sys/linux/$(am__dirstamp)
+	-rm -f core/sys/linux/linux/$(am__dirstamp)
 	-rm -f core/sys/linux/netinet/$(am__dirstamp)
 	-rm -f core/sys/linux/sys/$(am__dirstamp)
 	-rm -f core/sys/netbsd/$(am__dirstamp)
diff --git a/libphobos/libdruntime/core/sys/linux/linux/if_arp.d b/libphobos/libdruntime/core/sys/linux/linux/if_arp.d
new file mode 100644
index 0000000..dea0ab5
--- /dev/null
+++ b/libphobos/libdruntime/core/sys/linux/linux/if_arp.d
@@ -0,0 +1,136 @@
+//Written in the D programming language
+
+/++
+    D header file for Linux's linux/if_arp.h.
+
+    Copyright: Copyright 2023
+    License:   $(HTTP www.boost.org/LICENSE_1_0.txt, Boost License 1.0).
+    Authors:   $(HTTP jmdavisprog.com, Jonathan M Davis)
+ +/
+module core.sys.linux.linux.if_arp;
+
+version (linux):
+extern(C):
+@nogc:
+nothrow:
+
+import core.sys.posix.net.if_ : IF_NAMESIZE;
+import core.sys.posix.sys.socket : sockaddr;
+
+enum : ushort
+{
+    ARPHRD_NETROM     = 0,
+    ARPHRD_ETHER      = 1,
+    ARPHRD_EETHER     = 2,
+    ARPHRD_AX25       = 3,
+    ARPHRD_PRONET     = 4,
+    ARPHRD_CHAOS      = 5,
+    ARPHRD_IEEE802    = 6,
+    ARPHRD_ARCNET     = 7,
+    ARPHRD_APPLETLK   = 8,
+    ARPHRD_DLCI       =15,
+    ARPHRD_ATM        =19,
+    ARPHRD_METRICOM   = 23,
+    ARPHRD_IEEE1394   = 24,
+    ARPHRD_EUI64      = 27,
+    ARPHRD_INFINIBAND = 32,
+
+    ARPHRD_SLIP    = 256,
+    ARPHRD_CSLIP   = 257,
+    ARPHRD_SLIP6   = 258,
+    ARPHRD_CSLIP6  = 259,
+    ARPHRD_RSRVD   = 260,
+    ARPHRD_ADAPT   = 264,
+    ARPHRD_ROSE    = 270,
+    ARPHRD_X25     = 271,
+    ARPHRD_HWX25   = 272,
+    ARPHRD_CAN     = 280,
+    ARPHRD_MCTP    = 290,
+    ARPHRD_PPP     = 512,
+    ARPHRD_CISCO   = 513,
+    ARPHRD_HDLC    = ARPHRD_CISCO,
+    ARPHRD_LAPB    = 516,
+    ARPHRD_DDCMP   = 517,
+    ARPHRD_RAWHDLC = 518,
+    ARPHRD_RAWIP   = 519,
+
+    ARPHRD_TUNNEL   = 768,
+    ARPHRD_TUNNEL6  = 769,
+    ARPHRD_FRAD     = 770,
+    ARPHRD_SKIP     = 771,
+    ARPHRD_LOOPBACK = 772,
+    ARPHRD_LOCALTLK = 773,
+    ARPHRD_FDDI     = 774,
+    ARPHRD_BIF      = 775,
+    ARPHRD_SIT      = 776,
+    ARPHRD_IPDDP    = 777,
+    ARPHRD_IPGRE    = 778,
+    ARPHRD_PIMREG   = 779,
+    ARPHRD_HIPPI    = 780,
+    ARPHRD_ASH      = 781,
+    ARPHRD_ECONET   = 782,
+    ARPHRD_IRDA     = 783,
+
+    ARPHRD_FCPP     = 784,
+    ARPHRD_FCAL     = 785,
+    ARPHRD_FCPL     = 786,
+    ARPHRD_FCFABRIC = 787,
+
+    ARPHRD_IEEE802_TR         = 800,
+    ARPHRD_IEEE80211          = 801,
+    ARPHRD_IEEE80211_PRISM    = 802,
+    ARPHRD_IEEE80211_RADIOTAP = 803,
+    ARPHRD_IEEE802154         = 804,
+    ARPHRD_IEEE802154_MONITOR = 805,
+
+    ARPHRD_PHONET      = 820,
+    ARPHRD_PHONET_PIPE = 821,
+    ARPHRD_CAIF        = 822,
+    ARPHRD_IP6GRE      = 823,
+    ARPHRD_NETLINK     = 824,
+    ARPHRD_6LOWPAN     = 825,
+    ARPHRD_VSOCKMON    = 826,
+
+    ARPHRD_VOID = 0xFFFF,
+    ARPHRD_NONE = 0xFFFE,
+}
+
+enum : ushort
+{
+    ARPOP_REQUEST   = 1,
+    ARPOP_REPLY     = 2,
+    ARPOP_RREQUEST  = 3,
+    ARPOP_RREPLY    = 4,
+    ARPOP_InREQUEST = 8,
+    ARPOP_InREPLY   = 9,
+    ARPOP_NAK       = 10,
+}
+
+struct arpreq
+{
+    sockaddr          arp_pa;
+    sockaddr          arp_ha;
+    int               arp_flags;
+    sockaddr          arp_netmask;
+    char[IF_NAMESIZE] arp_dev;
+}
+
+enum
+{
+    ATF_COM         = 0x02,
+    ATF_PERM        = 0x04,
+    ATF_PUBL        = 0x08,
+    ATF_USETRAILERS = 0x10,
+    ATF_NETMASK     = 0x20,
+
+    ATF_DONTPUB     = 0x40,
+}
+
+struct arphdr
+{
+    ushort ar_hrd;
+    ushort ar_pro;
+    ubyte  ar_hln;
+    ubyte  ar_pln;
+    ushort ar_op;
+}
diff --git a/libphobos/libdruntime/core/sys/linux/linux/if_packet.d b/libphobos/libdruntime/core/sys/linux/linux/if_packet.d
new file mode 100644
index 0000000..b50b6a3
--- /dev/null
+++ b/libphobos/libdruntime/core/sys/linux/linux/if_packet.d
@@ -0,0 +1,315 @@
+//Written in the D programming language
+
+/++
+    D header file for Linux's linux/if_packet.h.
+
+    Copyright: Copyright 2023
+    License:   $(HTTP www.boost.org/LICENSE_1_0.txt, Boost License 1.0).
+    Authors:   $(HTTP jmdavisprog.com, Jonathan M Davis)
+ +/
+module core.sys.linux.linux.if_packet;
+
+version (linux):
+extern(C):
+@nogc:
+nothrow:
+
+import core.stdc.config : c_ulong;
+import core.sys.posix.sys.socket : sa_family_t;
+
+struct sockaddr_pkt
+{
+    sa_family_t spkt_family;
+    ubyte[14]   spkt_device;
+    ushort      spkt_protocol;
+}
+
+struct sockaddr_ll
+{
+    sa_family_t sll_family;
+    ushort      sll_protocol;
+    int         sll_ifindex;
+    ushort      sll_hatype;
+    ubyte       sll_pkttype;
+    ubyte       sll_halen;
+    ubyte[8]    sll_addr;
+}
+
+enum : ubyte
+{
+    PACKET_HOST      = 0,
+    PACKET_BROADCAST = 1,
+    PACKET_MULTICAST = 2,
+    PACKET_OTHERHOST = 3,
+    PACKET_OUTGOING  = 4,
+    PACKET_LOOPBACK  = 5,
+    PACKET_USER      = 6,
+    PACKET_KERNEL    = 7,
+}
+
+enum
+{
+    PACKET_ADD_MEMBERSHIP  = 1,
+    PACKET_DROP_MEMBERSHIP = 2,
+    PACKET_RECV_OUTPUT     = 3,
+
+    PACKET_RX_RING         = 5,
+    PACKET_STATISTICS      = 6,
+    PACKET_COPY_THRESH     = 7,
+    PACKET_AUXDATA         = 8,
+    PACKET_ORIGDEV         = 9,
+    PACKET_VERSION         = 10,
+    PACKET_HDRLEN          = 11,
+    PACKET_RESERVE         = 12,
+    PACKET_TX_RING         = 13,
+    PACKET_LOSS            = 14,
+    PACKET_VNET_HDR        = 15,
+    PACKET_TX_TIMESTAMP    = 16,
+    PACKET_TIMESTAMP       = 17,
+    PACKET_FANOUT          = 18,
+    PACKET_TX_HAS_OFF      = 19,
+    PACKET_QDISC_BYPASS    = 20,
+    PACKET_ROLLOVER_STATS  = 21,
+    PACKET_FANOUT_DATA     = 22,
+    PACKET_IGNORE_OUTGOING = 23,
+    PACKET_VNET_HDR_SZ     = 24,
+
+    PACKET_FANOUT_HASH     = 0,
+    PACKET_FANOUT_LB       = 1,
+    PACKET_FANOUT_CPU      = 2,
+    PACKET_FANOUT_ROLLOVER = 3,
+    PACKET_FANOUT_RND      = 4,
+    PACKET_FANOUT_QM       = 5,
+    PACKET_FANOUT_CBPF     = 6,
+    PACKET_FANOUT_EBPF     = 7,
+
+    PACKET_FANOUT_FLAG_ROLLOVER        = 0x1000,
+    PACKET_FANOUT_FLAG_UNIQUEID        = 0x2000,
+    PACKET_FANOUT_FLAG_IGNORE_OUTGOING = 0x4000,
+    PACKET_FANOUT_FLAG_DEFRAG          = 0x8000,
+}
+
+struct tpacket_stats
+{
+    uint tp_packets;
+    uint tp_drops;
+}
+
+struct tpacket_stats_v3
+{
+    uint tp_packets;
+    uint tp_drops;
+    uint tp_freeze_q_cnt;
+}
+
+struct tpacket_rollover_stats
+{
+    align(8):
+    ulong tp_all;
+    ulong tp_huge;
+    ulong tp_failed;
+}
+
+union tpacket_stats_u
+{
+    tpacket_stats    stats1;
+    tpacket_stats_v3 stats3;
+}
+
+struct tpacket_auxdata
+{
+    uint   tp_status;
+    uint   tp_len;
+    uint   tp_snaplen;
+    ushort tp_mac;
+    ushort tp_net;
+    ushort tp_vlan_tci;
+    ushort tp_vlan_tpid;
+}
+
+enum : uint
+{
+    TP_STATUS_KERNEL          = 0,
+    TP_STATUS_USER            = 1 << 0,
+    TP_STATUS_COPY            = 1 << 1,
+    TP_STATUS_LOSING          = 1 << 2,
+    TP_STATUS_CSUMNOTREADY    = 1 << 3,
+    TP_STATUS_VLAN_VALID      = 1 << 4,
+    TP_STATUS_BLK_TMO         = 1 << 5,
+    TP_STATUS_VLAN_TPID_VALID = 1 << 6,
+    TP_STATUS_CSUM_VALID      = 1 << 7,
+    TP_STATUS_GSO_TCP         = 1 << 8,
+}
+
+enum : uint
+{
+    TP_STATUS_AVAILABLE    = 0,
+    TP_STATUS_SEND_REQUEST = 1 << 0,
+    TP_STATUS_SENDING      = 1 << 1,
+    TP_STATUS_WRONG_FORMAT = 1 << 2,
+}
+
+enum : uint
+{
+    TP_STATUS_TS_SOFTWARE     = 1 << 29,
+    TP_STATUS_TS_RAW_HARDWARE = 1U << 31,
+}
+
+enum uint TP_FT_REQ_FILL_RXHASH = 0x1;
+
+struct tpacket_hdr
+{
+    c_ulong tp_status;
+    uint    tp_len;
+    uint    tp_snaplen;
+    ushort  tp_mac;
+    ushort  tp_net;
+    uint    tp_sec;
+    uint    tp_usec;
+}
+
+enum TPACKET_ALIGNMENT = 16;
+size_t TPACKET_ALIGN(size_t x) { return (x + TPACKET_ALIGNMENT - 1) &~ (TPACKET_ALIGNMENT - 1); }
+enum TPACKET_HDRLEN = TPACKET_ALIGN(tpacket_hdr.sizeof) + sockaddr_ll.sizeof;
+
+struct tpacket2_hdr
+{
+    uint     tp_status;
+    uint     tp_len;
+    uint     tp_snaplen;
+    ushort   tp_mac;
+    ushort   tp_net;
+    uint     tp_sec;
+    uint     tp_nsec;
+    ushort   tp_vlan_tci;
+    ushort   tp_vlan_tpid;
+    ubyte[4] tp_padding;
+}
+
+struct tpacket_hdr_variant1
+{
+    uint   tp_rxhash;
+    uint   tp_vlan_tci;
+    ushort tp_vlan_tpid;
+    ushort tp_padding;
+}
+
+struct tpacket3_hdr
+{
+    uint   tp_next_offset;
+    uint   tp_sec;
+    uint   tp_nsec;
+    uint   tp_snaplen;
+    uint   tp_len;
+    uint   tp_status;
+    ushort tp_mac;
+    ushort tp_net;
+
+    union
+    {
+        tpacket_hdr_variant1 hv1;
+    }
+
+    ubyte[8] tp_padding;
+}
+
+struct tpacket_bd_ts
+{
+    uint ts_sec;
+
+    union
+    {
+        uint ts_usec;
+        uint ts_nsec;
+    }
+}
+
+struct tpacket_hdr_v1
+{
+    uint block_status;
+    uint num_pkts;
+    uint offset_to_first_pkt;
+    uint blk_len;
+    align(8) ulong seq_num;
+    tpacket_bd_ts ts_first_pkt;
+    tpacket_bd_ts ts_last_pkt;
+}
+
+union tpacket_bd_header_u
+{
+    tpacket_hdr_v1 bh1;
+}
+
+struct tpacket_block_desc
+{
+    uint version_;
+    uint offset_to_priv;
+    tpacket_bd_header_u hdr;
+}
+
+enum TPACKET2_HDRLEN = TPACKET_ALIGN(tpacket2_hdr.sizeof) + sockaddr_ll.sizeof;
+enum TPACKET3_HDRLEN = TPACKET_ALIGN(tpacket3_hdr.sizeof) + sockaddr_ll.sizeof;
+
+enum tpacket_versions
+{
+    TPACKET_V1,
+    TPACKET_V2,
+    TPACKET_V3
+}
+
+struct tpacket_req
+{
+    uint tp_block_size;
+    uint tp_block_nr;
+    uint tp_frame_size;
+    uint tp_frame_nr;
+}
+
+struct tpacket_req3
+{
+    uint tp_block_size;
+    uint tp_block_nr;
+    uint tp_frame_size;
+    uint tp_frame_nr;
+    uint tp_retire_blk_tov;
+    uint tp_sizeof_priv;
+    uint tp_feature_req_word;
+}
+
+union tpacket_req_u
+{
+    tpacket_req  req;
+    tpacket_req3 req3;
+}
+
+struct packet_mreq
+{
+    int      mr_ifindex;
+    ushort   mr_type;
+    ushort   mr_alen;
+    ubyte[8] mr_address;
+}
+
+struct fanout_args
+{
+    version(LittleEndian)
+    {
+        ushort id;
+        ushort type_flags;
+    }
+    else
+    {
+        ushort type_flags;
+        ushort id;
+    }
+
+    uint max_num_members;
+}
+
+enum
+{
+    PACKET_MR_MULTICAST = 0,
+    PACKET_MR_PROMISC   = 1,
+    PACKET_MR_ALLMULTI  = 2,
+    PACKET_MR_UNICAST   = 3,
+}
diff --git a/libphobos/src/MERGE b/libphobos/src/MERGE
index a7bf856..8c536ce 100644
--- a/libphobos/src/MERGE
+++ b/libphobos/src/MERGE
@@ -1,4 +1,4 @@
-2458e8f82e3004197d8a66239a6b72e17264bb26
+1c98326e787e504d9045004e593273ec99b13121
 
 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/parallelism.d b/libphobos/src/std/parallelism.d
index 3fe8cd6..fadb4c1 100644
--- a/libphobos/src/std/parallelism.d
+++ b/libphobos/src/std/parallelism.d
@@ -418,8 +418,8 @@ Bugs:  Changes to `ref` and `out` arguments are not propagated to the
 */
 struct Task(alias fun, Args...)
 {
-    AbstractTask base = {runTask : &impl};
-    alias base this;
+    private AbstractTask base = {runTask : &impl};
+    private alias base this;
 
     private @property AbstractTask* basePtr()
     {
diff --git a/libphobos/src/std/range/primitives.d b/libphobos/src/std/range/primitives.d
index 1a3fb06..89cfa07 100644
--- a/libphobos/src/std/range/primitives.d
+++ b/libphobos/src/std/range/primitives.d
@@ -165,21 +165,24 @@ See_Also:
 
 Params:
     R = type to be tested
-    E = the type of the elements of the range if not `void`
+    E = if present, the elements of the range must be
+        $(DDSUBLINK spec/const3, implicit_qualifier_conversions, qualifier-convertible)
+        to this type
 
 Returns:
     `true` if R is an input range (possibly with element type `E`), `false` if not
  */
-enum bool isInputRange(R, E = void) =
+enum bool isInputRange(R) =
     is(typeof(R.init) == R)
     && is(typeof((R r) { return r.empty; } (R.init)) == bool)
     && (is(typeof((return ref R r) => r.front)) || is(typeof(ref (return ref R r) => r.front)))
     && !is(typeof((R r) { return r.front; } (R.init)) == void)
-    && is(typeof((R r) => r.popFront))
-    && (is(E == void) ||
-        is(ElementType!R == E) ||
-        is(const(ElementType!R) == E) ||
-        (is(const(ElementType!R) == immutable E) && is(const(E) == E)));
+    && is(typeof((R r) => r.popFront));
+
+/// ditto
+enum bool isInputRange(R, E) =
+    .isInputRange!R && isQualifierConvertible!(ElementType!R, E);
+
 ///
 @safe unittest
 {
diff --git a/libphobos/src/std/traits.d b/libphobos/src/std/traits.d
index aa69aac..2e7a4f6 100644
--- a/libphobos/src/std/traits.d
+++ b/libphobos/src/std/traits.d
@@ -132,6 +132,7 @@
  *           $(LREF PointerTarget)
  *           $(LREF Signed)
  *           $(LREF Unconst)
+ *           $(LREF Unshared)
  *           $(LREF Unqual)
  *           $(LREF Unsigned)
  *           $(LREF ValueType)
@@ -7848,6 +7849,46 @@ else
     static assert(is(Unconst!ImmIntArr == immutable(int)[]));
 }
 
+/++
+    Removes `shared` qualifier, if any, from type `T`.
+
+    Note that while `immutable` is implicitly `shared`, it is unaffected by
+    Unshared. Only explict `shared` is removed.
+  +/
+template Unshared(T)
+{
+    static if (is(T == shared U, U))
+        alias Unshared = U;
+    else
+        alias Unshared = T;
+}
+
+///
+@safe unittest
+{
+    static assert(is(Unshared!int == int));
+    static assert(is(Unshared!(const int) == const int));
+    static assert(is(Unshared!(immutable int) == immutable int));
+
+    static assert(is(Unshared!(shared int) == int));
+    static assert(is(Unshared!(shared(const int)) == const int));
+
+    static assert(is(Unshared!(shared(int[])) == shared(int)[]));
+}
+
+@safe unittest
+{
+    static assert(is(Unshared!(                   int) == int));
+    static assert(is(Unshared!(             const int) == const int));
+    static assert(is(Unshared!(       inout       int) == inout int));
+    static assert(is(Unshared!(       inout const int) == inout const int));
+    static assert(is(Unshared!(shared             int) == int));
+    static assert(is(Unshared!(shared       const int) == const int));
+    static assert(is(Unshared!(shared inout       int) == inout int));
+    static assert(is(Unshared!(shared inout const int) == inout const int));
+    static assert(is(Unshared!(         immutable int) == immutable int));
+}
+
 version (StdDdoc)
 {
     /**