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I assume, you have used the file extension ".html" for your html file? Then, as no language module supports ".html" files, we fall back trying to parse it as a Java file - that's the exception stacktrace you are seeing.
We might change this behaviour in the future to display a nicer message, such as "HTML is not supported".
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Originally posted by @adangel in #3521 (comment)
Falling back on Java creates confusing error messages (parsing errors from the java parser). It's more sensible to report "unknown language" or so.
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I assume, you have used the file extension ".html" for your html file? Then, as no language module supports ".html" files, we fall back trying to parse it as a Java file - that's the exception stacktrace you are seeing.
We might change this behaviour in the future to display a nicer message, such as "HTML is not supported".
...
Originally posted by @adangel in #3521 (comment)
Falling back on Java creates confusing error messages (parsing errors from the java parser). It's more sensible to report "unknown language" or so.