https://cros-goldeneye.corp.google.com/chromeos/healthmonitoring/buildDetails?buildbucketId=8938599457345485744

graphics_Sanity                         ERROR: Timed out waiting for condition: Failed to take a screenshot. There may be an issue with this ChromeOS image.
graphics_Sanity                         retry_count: 2


This is another instance of SIGSYS crashes on dash:

Operating system: Linux
                  0.0.0 Linux 3.8.11 #1 SMP Fri Aug 10 00:52:39 PDT 2018 x86_64
CPU: amd64
     family 6 model 69 stepping 1
     2 CPUs

GPU: UNKNOWN

Crash reason:  SIGSYS
Crash address: 0x0
Process uptime: not available

Thread 0 (crashed)
 0  libc-2.23.so!pipe + 0x7
 1  dash!evalbackcmd [eval.c : 628 + 0x5]
 2  dash!argstr [expand.c : 530 + 0xf]
 3  dash!expandarg [expand.c : 194 + 0x7]
 4  dash!evalcommand [eval.c : 739 + 0x10]
 5  dash!evaltree [eval.c : 287 + 0x8]
 6  dash!evaltree [eval.c : 287 + 0x8]
 7  dash!evaltree [eval.c : 279 + 0x5]
 8  dash!evaltree [eval.c : 287 + 0x8]
 9  dash!evaltree [eval.c : 287 + 0x8]
10  dash!evalfun [eval.c : 971 + 0x5]
11  dash!evalcommand [eval.c : 887 + 0x14]
12  dash!evaltree [eval.c : 287 + 0x8]
13  dash!cmdloop [main.c : 232 + 0xa]
14  dash!main [main.c : 174 + 0xa]
15  libc-2.23.so!__libc_start_main [libc-start.c : 289 + 0x1a]
16  dash!_start + 0x29
17  0x7ffc109f63a8
18  dash!_init + 0x560

Loaded modules:
0x7f2eb2b9c000 - 0x7f2eb2d3cfff  libc-2.23.so  ???
0x7f2eb2f47000 - 0x7f2eb2f6bfff  ld-2.23.so  ???
0x7f2eb316e000 - 0x7f2eb3184fff  dash  ???  (main)
0x7ffc109fa000 - 0x7ffc109fafff  linux-gate.so  ???