m ... misinterpretation
r ... rejection
s ... write syntax deviation 
x ... extension

#5   x '\t' (reader)
#177 x succeeds (reader)
#18  m '\'
#35  m /*
#36  m /**
#180 r sy._e(..) (reader)
#64  r sy._e(..) (reader)
#135 m -1
#183 m -1^2
#216 m - -1
#102 ? x Error fails
#107 x X = ... (reader)
#213 r sy._e(..) (reader)
#214 r sy._e(..) (reader)
#172 m 0.000000.
#248 s - ~(1,2)
#249 s ~(1,2)
#197 r sy._e(..) (reader)
#120 r sy._e(..) (reader)
#208 m 0'f '

New cases:

#245 m writeq('$VAR'(-1)). @
#246 m writeq('$VAR'(-2)). ?
#247 writeq('$VAR'(x)). OK
#248 s writeq(- (1~2)). - ~(1,2)
#249 s writeq(1~2). ~(1,2).
#250 m writeq(''). (reader)
#294 x writeq({'['}). (reader)
#295 x writeq({'('}). (reader)
#302 r sy._e(..) (reader)
#318 m writeq(+(1*2)^3).

0: *