Proper runtsafe scope for commands and detect undeclared vars

[invisig0th]

No description provided.

[codecov]

Codecov Report

Merging #1916 into master will increase coverage by 0.08%.
The diff coverage is 97.36%.

@@            Coverage Diff             @@
##           master    #1916      +/-   ##
==========================================
+ Coverage   96.59%   96.68%   +0.08%     
==========================================
  Files         139      139              
  Lines       26470    26500      +30     
==========================================
+ Hits        25570    25621      +51     
+ Misses        900      879      -21     

Flag	Coverage Δ
#linux	96.68% <97.36%> (+0.08%)	⬆️
#linux_replay	70.93% <96.05%> (+0.01%)	⬆️

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Impacted Files	Coverage Δ
synapse/lib/stormtypes.py	97.54% <90.00%> (-0.08%)	⬇️
synapse/lib/ast.py	98.09% <100.00%> (+<0.01%)	⬆️
synapse/lib/node.py	97.75% <100.00%> (+0.01%)	⬆️
synapse/lib/storm.py	98.30% <100.00%> (-0.01%)	⬇️
synapse/lib/lmdbslab.py	99.59% <0.00%> (+0.20%)	⬆️
synapse/common.py	97.48% <0.00%> (+0.31%)	⬆️
synapse/lib/spawn.py	95.51% <0.00%> (+6.41%)	⬆️

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