3 % [ a8 a8 a8 a8 a8 ] % assertion fail
4 % [ a8 a8 a8 ] % assertion fail
5 % [ a8 ] % assertion fail
9 % a......... % fatal error -- assert
12 abc % ok; print error, no output
13 \bla % no warning-> this STRING, reduced to lyric_elt.
14 a [ b % warning, still output
15 { a( b } % warning, still output
25 These Gates will open just like windows. % ok; warning
30 include "this-is-hopefully-a-nonexisting-file"