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Report an error if resolution of closure call functions failed by FabianWolff ·...
source link: https://github.com/rust-lang/rust/pull/86249
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This pull request fixes #86238. The current implementation seems to assume that resolution of closure call functions (I'm not sure what the proper term is; I mean call of Fn etc.) can never fail:
None => {
span_bug!(
self.call_expr.span,
"failed to find an overloaded call trait for closure call"
);
}
But actually, it can, if the fn/fn_mut/fn_once lang items are not defined, or don't have an associated call/call_mut/call_once function, leading to the ICE described in #86238. I have therefore turned the span_bug!() into an error message, which prevents the ICE.
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