Failure to build zig-HEAD on -current aarch64

Hi, 

I build zig from time to time on -current, both on amd64 and aarch64. Lately, my aarch64 builds do not complete - the second stage compiler zig2    is in parked state, not doing anything (obviously). There appears on resource shortage of any kind. This is on today's -current. The same zig version on the same NetBSD-current on amd64 builds just fine (on a smaller VM). The traces are as follows:
...

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Attaching to process 19381
Reading symbols from /home/ci4/src/zig/build/zig2...
(No debugging symbols found in /home/ci4/src/zig/build/zig2)
[New LWP 19381 of process 19381]
Reading symbols from /usr/pkg/lib/libclang-cpp.so.21.1...
(No debugging symbols found in /usr/pkg/lib/libclang-cpp.so.21.1)
Reading symbols from /usr/pkg/lib/libLLVM.so.21.1...
(No debugging symbols found in /usr/pkg/lib/libLLVM.so.21.1)
Reading symbols from /usr/lib/librt.so.1...
(No debugging symbols found in /usr/lib/librt.so.1)
Reading symbols from /usr/lib/libexecinfo.so.0...
(No debugging symbols found in /usr/lib/libexecinfo.so.0)
Reading symbols from /usr/lib/libpthread.so.1...
(No debugging symbols found in /usr/lib/libpthread.so.1)
Reading symbols from /usr/lib/libz.so.1...
(No debugging symbols found in /usr/lib/libz.so.1)
Reading symbols from /usr/pkg/lib/libzstd.so.1...
(No debugging symbols found in /usr/pkg/lib/libzstd.so.1)
Reading symbols from /usr/pkg/lib/libxml2.so.16...
(No debugging symbols found in /usr/pkg/lib/libxml2.so.16)
Reading symbols from /usr/lib/libm.so.0...
(No debugging symbols found in /usr/lib/libm.so.0)
Reading symbols from /usr/lib/libstdc++.so.9...
(No debugging symbols found in /usr/lib/libstdc++.so.9)
Reading symbols from /usr/lib/libc.so.12...
(No debugging symbols found in /usr/lib/libc.so.12)
Reading symbols from /usr/lib/libedit.so.3...
(No debugging symbols found in /usr/lib/libedit.so.3)
Reading symbols from /usr/lib/libgcc_s.so.1...
(No debugging symbols found in /usr/lib/libgcc_s.so.1)
Reading symbols from /usr/lib/libelf.so.2...
(No debugging symbols found in /usr/lib/libelf.so.2)
Reading symbols from /usr/lib/liblzma.so.2...
(No debugging symbols found in /usr/lib/liblzma.so.2)
Reading symbols from /lib/libterminfo.so.2...
(No debugging symbols found in /lib/libterminfo.so.2)
Reading symbols from /usr/libexec/ld.elf_so...
(No debugging symbols found in /usr/libexec/ld.elf_so)
0x0000f314cd407360 in ___lwp_park60 () from /usr/lib/libc.so.12

(gdb) bt
#0  0x0000f314cd407360 in ___lwp_park60 () from /usr/lib/libc.so.12
#1  0x0000000200304984 in Io_Threaded_park__4860 ()
#2  0x00000002003fd228 in Io_Threaded_parking_futex_wait__5106 ()
#3  0x00000002002fe540 in Io_Threaded_Thread_futexWaitInner__4971 ()
#4  0x000000020024a1c0 in Io_Threaded_Thread_futexWait__4970 ()
#5  0x000000020019b5b0 in Io_Threaded_futexWait__4495 ()
#6  0x0000000201018b64 in Io_futexWaitTimeout__anon_405197__106129 ()
#7  0x0000000200c8e618 in Io_futexWait__anon_349919__101113 ()
#8  0x00000002009744a0 in Io_Condition_waitInner__4902 ()
#9  0x00000002006f93d8 in Io_Condition_wait__4900 ()
#10 0x00000002013e5858 in Io_TypeErasedQueue_getLocked__4342 ()
#11 0x0000000200fc3768 in Io_TypeErasedQueue_get__4339 ()
#12 0x0000000200c1f89c in Io_Queue_28link_PrelinkTask_29_get__25784 ()
#13 0x0000000200938e3c in link_Queue_runLinkTasks__9590 ()
#14 0x00000002006ddb40 in Io_concurrent__anon_137515_TypeErased_start__79099 ()
#15 0x00000002002fdb54 in Io_Threaded_Future_start__32179 ()
#16 0x0000000200676194 in Io_Threaded_worker__4440 ()
#17 0x00000002003fcb7c in Thread_callFn__anon_107876__66773 ()
#18 0x00000002002fe304 in Thread_PosixThreadImpl_spawn__anon_85037_Instance_entryFn__62324 ()
#19 0x0000f314cdd0dfd4 in ?? () from /usr/lib/libpthread.so.1
#20 0x0000f314cd3e7514 in __mknod50 () from /usr/lib/libc.so.12
Backtrace stopped: previous frame identical to this frame (corrupt stack?)


...

Any clues? 

Chavdar 



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