`scope screen` does not capture data about appscope

[seanvaleo]

With AppScope version 1.4.1 I am able to see events and metrics generated by screen. This issue seems to have been resolved somewhere along the way.

sudo apt install -y screen
./scope screen
echo foo
exit

./scope events
...
[231] Jul 17 10:54:27 screen fs fs.open file:/etc/screenrc
[Kb1] Jul 17 10:54:27 screen fs fs.close file:/etc/screenrc file_read_bytes:221184 file_read_ops:108 file_write_bytes:0 file_write_ops:0
[3m1] Jul 17 10:54:27 screen fs fs.open file:/lib/terminfo/x/xterm-256color
[2v1] Jul 17 10:54:27 screen fs fs.close file:/lib/terminfo/x/xterm-256color file_read_bytes:0 file_read_ops:0 file_write_bytes:0 file_write_ops:0
[wF1] Jul 17 10:54:27 screen fs fs.open file:/lib/terminfo/s/screen.xterm-256color
[BO1] Jul 17 10:54:27 screen fs fs.close file:/lib/terminfo/s/screen.xterm-256color file_read_bytes:0 file_read_ops:0 file_write_bytes:0 file_write_ops:0
[bZ1] Jul 17 10:54:27 screen fs fs.open file:/lib/terminfo/x/xterm-256color
[982] Jul 17 10:54:27 screen fs fs.close file:/lib/terminfo/x/xterm-256color file_read_bytes:0 file_read_ops:0 file_write_bytes:0 file_write_ops:0
[Di2] Jul 17 10:54:27 screen fs fs.open file:/etc/screenrc
[RX2] Jul 17 10:54:27 screen fs fs.close file:/etc/screenrc file_read_bytes:221184 file_read_ops:108 file_write_bytes:0 file_write_ops:0
[1Wg] Jul 17 10:54:35 screen fs fs.delete file:/run/screen/S-sean/788853.pts-5.redacted host:redacted op:unlink pid:788853 proc:screen unit
...

./scope metrics
...
NAME             VALUE           TYPE     UNIT           PID       TAGS
proc.start       1               Count    process        788842    args: screen,gid: 1000,groupname: sean,host: redacted,proc: screen,uid: …
proc.start       1               Count    process        788853    args: screen,gid: 1000,groupname: sean,host: redacted,proc: screen,uid: …
proc.start       1               Count    process        788855    args: SCREEN,gid: 1000,groupname: sean,host: redacted,proc: SCREEN,uid: …
proc.start       1               Count    process        788856    args: SCREEN,gid: 1000,groupname: sean,host: redacted,proc: SCREEN,uid: …
proc.start       1               Count    process        788855    args: /bin/bash,gid: 1000,groupname: sean,host: redacted,proc: bash,uid:…
proc.start       1               Count    process        788858    args: /bin/bash,gid: 1000,groupname: sean,host: redacted,proc: bash,uid:…
proc.start       1               Count    process        788858    args: /bin/sh /usr/bin/lesspipe,gid: 1000,groupname: sean,host: redacted…
proc.start       1               Count    process        788859    args: /bin/sh /usr/bin/lesspipe,gid: 1000,groupname: sean,host: redacted…
proc.start       1               Count    process        788859    args: basename /usr/bin/lesspipe,gid: 1000,groupname: sean,host: precisio…
proc.start       1               Count    process        788866    args: SCREEN,gid: 1000,groupname: sean,host: redacted,proc: SCREEN,uid: …
proc.cpu         474667          Count    microsecond    788853    host: redacted,proc: screen
proc.cpu_perc    4.74667         Gauge    percent        788853    host: redacted,proc: screen
proc.mem         47372           Gauge    kibibyte       788853    host: redacted,proc: screen
proc.thread      2               Gauge    thread         788853    host: redacted,proc: screen
proc.fd          8               Gauge    file           788853    host: redacted,proc: screen
proc.child       1               Gauge    process        788853    host: redacted,proc: screen
fs.read          442393          Count    byte           788853    host: redacted,proc: screen,summary: true
proc.cpu         513297          Count    microsecond    788842    host: redacted,proc: screen
fs.write         1707            Count    byte           788853    host: redacted,proc: screen,summary: true
fs.stat          3               Count    operation      788853    host: redacted,proc: screen,summary: true
proc.cpu_perc    5.13297         Gauge    percent        788842    host: redacted,proc: screen
fs.open          12              Count    operation      788853    host: redacted,proc: screen,summary: true
fs.close         12              Count    operation      788853    host: redacted,proc: screen,summary: true
net.port         1               Gauge    instance       788853    host: redacted,proc: screen,summary: true
net.tcp          1               Gauge    connection     788853    host: redacted,proc: screen,summary: true
proc.mem         47068           Gauge    kibibyte       788842    host: redacted,proc: screen
fs.duration      1               Count    microsecond    788853    host: redacted,proc: screen,summary: true
net.error        1               Count    operation      788853    class: connection,host: redacted,proc: screen,summary: true
proc.thread      2               Gauge    thread         788842    host: redacted,proc: screen
fs.error         2               Count    operation      788853    class: open_close,host: redacted,proc: screen,summary: true
fs.error         5               Count    operation      788853    class: read_write,host: redacted,proc: screen,summary: true
fs.error         3               Count    operation      788853    class: stat,host: redacted,proc: screen,summary: true
proc.fd          6               Gauge    file           788842    host: redacted,proc: screen
proc.child       1               Gauge    process        788842    host: redacted,proc: screen
fs.stat          1               Count    operation      788842    host: redacted,proc: screen,summary: true
fs.error         1               Count    operation      788842    class: stat,host: redacted,proc: screen,summary: true
...