Report an error if resolution of closure call functions failed #86249
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r? @varkor (rust-highfive has picked a reviewer for you, use r? to override) |
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| "make sure the `fn`/`fn_mut`/`fn_once` lang items are defined \ | ||
| and have an associated `call`/`call_mut`/`call_once` function", |
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| "make sure the `fn`/`fn_mut`/`fn_once` lang items are defined \ | |
| and have an associated `call`/`call_mut`/`call_once` function", | |
| "make sure the `fn`/`fn_mut`/`fn_once` lang items are defined \ | |
| and have associated `call`/`call_mut`/`call_once` functions", |
Just to make sure the plurals match up.
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Fixed. Thanks for the review!
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This looks good. r=me after tweaking the wording. Sorry for taking so long to get to this. |
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Thanks! @bors r+ |
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Report an error if resolution of closure call functions failed This pull request fixes rust-lang#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: https://github.com/rust-lang/rust/blob/60f1a2fc4b535ead9c85ce085fdce49b1b097531/compiler/rustc_typeck/src/check/callee.rs#L590-L595 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 rust-lang#86238. I have therefore turned the `span_bug!()` into an error message, which prevents the ICE.
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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
callofFnetc.) can never fail:rust/compiler/rustc_typeck/src/check/callee.rs
Lines 590 to 595 in 60f1a2f
But actually, it can, if the
fn/fn_mut/fn_oncelang items are not defined, or don't have an associatedcall/call_mut/call_oncefunction, leading to the ICE described in #86238. I have therefore turned thespan_bug!()into an error message, which prevents the ICE.