multiple ICE's for different patterns in array lengths #51963
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I-ICE
Issue: The compiler panicked, giving an Internal Compilation Error (ICE) ❄️
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Update: It seems there are more versions that produces the fn main() {
[(); return while let Some(n) = Some(1) {}];
}fn main() {
[(); return for _ in 0.. {}];
} |
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another update: with 3 other match expressions I also got the same ICE message: fn main() {
[(); return match 1 {
n => n,
}]
}matching a fn main() {
[(); return match loop {} {
something => 1
}]
}
fn main() {
[(); return match () {
foo => n
}]
} |
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IMPOSSIBLE CASE REACHED fn main() {
[(); return match 1 {
1 => 1,
}]
}Backtrace: |
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UNEXPECTED TYPE fn main() {
[(); return match () {
'c' => 1
}];
}Backtrace: |
estebank
added
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I-ICE
Mark-Simulacrum
added a commit
to Mark-Simulacrum/rust
that referenced
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Jul 2, 2018
…=estebank Fix various issues with control-flow statements inside anonymous constants Fixes rust-lang#51761. Fixes rust-lang#51963 (and the host of other reported issues there). (Might be easiest to review per commit, as they should be standalone.) r? @estebank
DutchGhost
changed the title
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found another one that gives the 'missing binding mode' message, fn main() {
[(); return None?]
} |
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@DutchGhost: can't test now, but let's see if that's also fixed when #51967 is merged (I think it should be). |
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not only array constants are able to ICE: [] - MISSING BINDING MODE - [] fn main() {
const const_binding_mode_crash: () = return |crash| {};
} fn main() {
enum enum_binding_mode_crash {
t = return |crash| ()
}
} [] - UNEXPECTED TYPE - [] fn main() {
enum enum_unexpected_type_crash {
t = return match () {
'c' => 1,
},
}
} [] - IMPOSSIBLE CASE REACHED - [] fn main() {
enum enum_impossible_case_reached {
t = return match 1 {
1 => 1,
}
}
} |
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@DutchGhost: let's check these after #51967 is merged, and if any are still occurring afterwards, we can open new issues for them. |
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Another ICE on invalid expressions for array lengths:
this is related to #51714, but has been fixed in #51723, and that fix is active in the current nightly.
playground: https://play.rust-lang.org/?gist=6d0a811852e0f67736d2a189c5fdc0d3&version=nightly&mode=release&edition=2015
Putting a type on the closure's argument does not make any difference.
Backtrace:
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