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improve error message when doing an invalid help query #25447

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improve error message when doing an invalid help query #25447

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4 changes: 4 additions & 0 deletions base/docs/utils.jl
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Original file line number Diff line number Diff line change
Expand Up @@ -104,6 +104,10 @@ function helpmode(io::IO, line::AbstractString)
Symbol(line)
else
x = Meta.parse(line, raise = false, depwarn = false)
if isa(x, Expr) && (x.head == :incomplete || x.head == :error)
println("\"$line\" is not a valid help query")
return
end
# Retrieving docs for macros requires us to make a distinction between the text
# `@macroname` and `@macroname()`. These both parse the same, but are used by
# the docsystem to return different results. The first returns all documentation
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