This doesn't seem to be happening on post-submits as I couldn't find any failures in the past 200 runs.

But both @jason-simmons and @flar have reported the following failures in the Apple Metal shader compiler:

• https://logs.chromium.org/logs/flutter/buildbucket/cr-buildbucket/8798119691463670465/+/u/test:_Host_Tests_for_host_profile/stdout
• https://logs.chromium.org/logs/flutter/buildbucket/cr-buildbucket/8798139573040246465/+/u/test:_Host_Tests_for_host_profile/stdout
• https://logs.chromium.org/logs/flutter/buildbucket/cr-buildbucket/8798139573040246465/+/u/test:_Host_Tests_for_host_profile__2_/stdout
• https://logs.chromium.org/logs/flutter/buildbucket/cr-buildbucket/8798139573040246465/+/u/test:_Host_Tests_for_host_profile__3_/stdout
• https://logs.chromium.org/logs/flutter/buildbucket/cr-buildbucket/8798135684776124433/+/u/test:_Host_Tests_for_host_profile__2_/stdout
• https://logs.chromium.org/logs/flutter/buildbucket/cr-buildbucket/8798135684776124433/+/u/test:_Host_Tests_for_host_profile__3_/stdout

The specific shader or test case doesn't seem to matter.