From map:

{ starts both hash references and blocks, so map { ... could be either the start of map BLOCK LIST or map EXPR, LIST. Because Perl doesn't look ahead for the closing } it has to take a guess at which it's dealing with based on what it finds just after the {. Usually it gets it right, but if it doesn't it won't realize something is wrong until it gets to the } and encounters the missing (or unexpected) comma. The syntax error will be reported close to the }, but you'll need to change something near the { such as using a unary + or semicolon to give Perl some help: 
$ perl -wMstrict -le 'print map { (2, $_) } 1 .. 2'
2122
$ perl -wMstrict -le 'print map {; 2, $_ } 1 .. 2'
2122
$ perl -wMstrict -le 'print map { +2, $_ } 1 .. 2'
2122

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In reply to Re: strange syntax error with map by haukex
in thread strange syntax error with map by rsFalse

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