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Ensure that heredoc lexing allows only valid identifiers #16548

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Ensure that heredoc lexing allows only valid identifiers #16548

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2 changes: 2 additions & 0 deletions spec/compiler/lexer/lexer_spec.cr
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Original file line number Diff line number Diff line change
Expand Up @@ -712,4 +712,6 @@ describe "Lexer" do
token.delimiter_state.kind.should eq(Token::DelimiterKind::HEREDOC)
token.raw.should eq "<<-EOS"
end

assert_syntax_error "<<-123\n456\n123", "heredoc identifier starts with invalid character"
end
2 changes: 1 addition & 1 deletion src/compiler/crystal/syntax/lexer.cr
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Expand Up @@ -2469,7 +2469,7 @@ module Crystal
next_char
end

unless ident_part?(current_char)
unless ident_start?(current_char)
raise "heredoc identifier starts with invalid character"
end

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