report invalid global expressions clearly#662
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Signed-off-by: CrazyMax <1951866+crazy-max@users.noreply.github.com>
Signed-off-by: CrazyMax <1951866+crazy-max@users.noreply.github.com>
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fixes #545
Handlebars silently renders missing helpers as empty strings, which made configuration mistakes look like boolean parsing failures. Validating the expression name at the rendering boundary preserves existing behavior for documented expressions while producing a more useful error for unsupported ones.
The global expression map in
setGlobalExpnow doubles as the allowed expression list, and the parsed Handlebars template is checked inline before compilation.