CHECK: Comparison to NULL could be written "!v->node"
CHECK: No space is necessary after a cast
CHECK: spaces preferred around that '*' (ctx:WxO)
CHECK: spaces preferred around that '*' (ctx:WxV)
WARNING: Missing a blank line after declarations
WARNING: line length of 83 exceeds 80 columns
WARNING: line length of 85 exceeds 80 columns
WARNING: line length of 87 exceeds 80 columns