Skip to main content

L1323 - Deprecated Catch Expression

Warning​

  foo() ->
    catch bar().
%%  ^^^^^ warning: 'catch ...' is deprecated

Explanation​

Bare catch Expr expressions are deprecated. Use try ... catch ... end instead.

The old-style catch swallows all exceptions and returns {'EXIT', Reason} tuples for errors and throws, which is error-prone. The try ... catch ... end syntax provides explicit control over which exception classes to handle.

%% Instead of:
foo() -> catch bar().

%% Write:
foo() ->
    try bar()
    catch _:_ -> error
    end.

This warning can be suppressed with -compile(nowarn_deprecated_catch).