[Issue 18667] Segfault in std.file.dirEntries

[d-bugmail at puremagic.com]

https://issues.dlang.org/show_bug.cgi?id=18667

--- Comment #1 from Seb <greensunny12 at gmail.com> ---
Another related segfault from Phobos's CircleCi

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Program received signal SIGHUP, Hangup.
__lll_lock_wait_private () at
../nptl/sysdeps/unix/sysv/linux/x86_64/lowlevellock.S:95
95      ../nptl/sysdeps/unix/sysv/linux/x86_64/lowlevellock.S: No such file or
directory.
#0  __lll_lock_wait_private () at
../nptl/sysdeps/unix/sysv/linux/x86_64/lowlevellock.S:95
#1  0x00007ffff6fa7068 in _L_lock_29 () from /lib/x86_64-linux-gnu/libc.so.6
#2  0x00007ffff6fa6fc0 in __readdir (dirp=0x7ffff7f2af84) at
../sysdeps/posix/readdir.c:44
#3  0x0000000000aca6d1 in std.file.DirIteratorImpl.next() (this=...) at
std/file.d:4555
#4  0x0000000000acab90 in std.file.DirIteratorImpl.popFront() (this=...) at
std/file.d:4659
#5  0x0000000000acae39 in std.file.DirIterator.popFront() (this=...) at
std/file.d:4681
#6  0x00000000008f9e65 in dsymbol.modulecache.ModuleCache.addImportPaths()
(this=0x7ffff7ee9560, root=...) at dsymbol/src/dsymbol/modulecache.d:133
#7  0x00000000008f9e59 in dsymbol.modulecache.ModuleCache.addImportPaths()
(this=0x7ffff7ee9560, root=...) at dsymbol/src/dsymbol/modulecache.d:132
#8  0x00000000008f9e59 in dsymbol.modulecache.ModuleCache.addImportPaths()
(this=0x7ffff7ee9560, root=...) at dsymbol/src/dsymbol/modulecache.d:132
#9  0x00000000008f9c8f in dsymbol.modulecache.ModuleCache.addImportPaths()
(this=..., paths=...) at dsymbol/src/dsymbol/modulecache.d:136
#10 0x0000000000a1896b in D main (args=...) at src/dscanner/main.d:158
#11 0x0000000000ab5d74 in rt.dmain2._d_run_main() (this=0x7fffffffe3c0) at
src/rt/dmain2.d:508
#12 0x0000000000ab5bbc in rt.dmain2._d_run_main() (this=0x7fffffffe3c0, dg=...)
at src/rt/dmain2.d:469
#13 0x0000000000ab5cc9 in rt.dmain2._d_run_main() (this=0x7fffffffe3c0) at
src/rt/dmain2.d:508
#14 0x0000000000ab5bbc in rt.dmain2._d_run_main() (this=0x7fffffffe3c0, dg=...)
at src/rt/dmain2.d:469
#15 0x0000000000ab5b20 in _d_run_main (argc=7, argv=0x7fffffffe4c8,
mainFunc=0xa18328 <D main>) at src/rt/dmain2.d:528
#16 0x0000000000a26f82 in main ()
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