Trace subshell errors.

platform-darwin/Scripts/genassets

@@ -2,8 +2,8 @@
 # See https://developer.apple.com/library/ios/qa/qa1686/_index.html
 cd "${BASH_SOURCE%/*}"
 source bashlib
-trap 'c=$BASH_COMMAND s=$?; (( s )) && echo >&2 "ERROR: $s: $c"; exit $s' EXIT
-set -e
+trap 'echo >&2 "ERROR: $?: $BASH_COMMAND"' ERR
+set -eE
 cd ..
 export PATH+=:/usr/local/bin
 

platform-darwin/Scripts/updatePlist

@@ -1,8 +1,8 @@
 #!/usr/bin/env bash
 cd "${BASH_SOURCE%/*}"
 source ./bashlib
-trap 'c=$BASH_COMMAND s=$?; (( s )) && echo >&2 "ERROR: $s: $c"; exit $s' EXIT
-set -e
+trap 'echo >&2 "ERROR: $?: $BASH_COMMAND"' ERR
+set -eE
 cd ..
 export PATH+=:/usr/libexec