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add case to catch missing comma (#64) #364

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add case to catch missing comma (#64) #364

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3 changes: 3 additions & 0 deletions src/dynamic/dynamic.jl
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Original file line number Diff line number Diff line change
Expand Up @@ -70,6 +70,9 @@ function dynamic_trace_impl(expr::Expr)
@assert expr.head == :gentrace "Not a Gen trace expression."
call, addr = expr.args[1], expr.args[2]
if (call.head != :call) error("syntax error in @trace at $(call)") end
if (call.args[1] == :(:))
error("syntax error (missing comma in @trace expr?) at $(call)")
end
fn = call.args[1]
args = Expr(:tuple, call.args[2:end]...)
if addr != nothing
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