[Pharo-users] don't understand why cascading doesn't work

I'm embarrassed to write about this. I've been playing with the code, reading docs, etc. for an hour: With a Transcript window open, executing any of the following lines (from a Playground): Transcript show: 1; ' '; 2; cr. Transcript show: 'a'; cr; 'b'. Transcript show: 1; cr; '2'. fails, after which is shown a pink box with the text 'Message expected ->'. I'm sure it's something simple. What am I missing? Thanks.