chebyshevform cannot be used out of execute() statements (from gforge #21760)
Imported issue: Initially reported by @x-CLaute in https://gforge.inria.fr/tracker/?group_id=1015&aid=21760
The command chebyshevform can be used
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at the prompt or in files given to Sollya in argument
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in parse() statements.
It cannot be used in execute() statements. A weird syntax error occurs:
Warning: syntax error, unexpected chebyshevform.
Will skip input until next semicolon after the unexpected token. May leak memory.
The syntax error indicates that chebyshevform is recognized by the lexer as some token different from an identifier token but cannot be processed.