[TASK] Allow TemplateValidator to discover underscore variables #1283
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Fluid 5 disallows variable names that start with an underscore. While this is already enforced in `StandardVariableProvider` for setting such variables, this change now also triggers an exception if a variable with an invalid name is accessed. This is probably a temporary change to be removed with Fluid 6. For now, it allows the `TemplateValidator`, which is used during template warmup, to discover this issue during parse time, and to let users know about affected templates. Resolves: #1263
sbuerk
approved these changes
Dec 16, 2025
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Fluid 5 disallows variable names that start with an underscore. While
this is already enforced in
StandardVariableProviderfor settingsuch variables, this change now also triggers an exception if a
variable with an invalid name is accessed.
This is probably a temporary change to be removed with Fluid 6. For now,
it allows the
TemplateValidator, which is used during templatewarmup, to discover this issue during parse time, and to let users
know about affected templates.
Resolves: #1263