runtime-current-test is written as UTF-16 (see SkiaSamplesAppHelper / the WASM file-creation server), but this script reads it withcat and then runs it throughtr/sed. UTF-16 content will contain NUL bytes and will be truncated/garbled in bash, so the heartbeat XML message will be incorrect. Decode to UTF-8 first (e.g., viaiconv -f utf-16 -t utf-8 when available) before escaping/writing XML.

The wait loop above still uses[[ ! $(adb shell test -e ...) && ... ]] (command substitution), which checks the (empty) output string rather than the command exit code. That means the loop won’t terminate when the results file appears unless the app exits or the timeout hits. Update the loop condition to use the command’s exit status (e.g.,while ! adb shell test -e ... >/dev/null 2>&1 && ...; do ...).

Thewhile loop above uses[[ ! $(adb shell test -e ...) && ... ]] (command substitution), so it evaluates the (empty) output instead of the exit status. If the app keeps running after writing results, this can cause the script to wait until timeout even though the results file exists. Use the command exit code in the loop condition (e.g.,while ! adb shell test -e ... >/dev/null 2>&1 && ...; do).