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mention that #[track_caller] on fn main is forbidden #872

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mention that #[track_caller] on fn main is forbidden #872

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8 changes: 4 additions & 4 deletions src/attributes/codegen.md
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Expand Up @@ -145,10 +145,10 @@ feature detection on the x86 platforms.

## The `track_caller` attribute

The `track_caller` attribute may be applied to any function with [`"Rust"` ABI][rust-abi]. When
applied to functions and methods in trait declarations, the attribute applies to all
implementations. If the trait provides a default implementation with the attribute, then the
attribute also applies to override implementations.
The `track_caller` attribute may be applied to any function with [`"Rust"` ABI][rust-abi]
with the exception of the entry point `fn main`. When applied to functions and methods in
trait declarations, the attribute applies to all implementations. If the trait provides a
default implementation with the attribute, then the attribute also applies to override implementations.

When applied to a function in an `extern` block the attribute must also be applied to any linked
implementations, otherwise undefined behavior results. When applied to a function which is made
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