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add a ui test for the inference variable warning
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src/test/ui/inference-variable-behind-raw-pointer.rs
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15
src/test/ui/inference-variable-behind-raw-pointer.rs
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// Copyright 2017 The Rust Project Developers. See the COPYRIGHT
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// file at the top-level directory of this distribution and at
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// http://rust-lang.org/COPYRIGHT.
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//
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// Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or
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// http://www.apache.org/licenses/LICENSE-2.0> or the MIT license
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// <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your
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// option. This file may not be copied, modified, or distributed
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// except according to those terms.
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fn main() {
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let data = std::ptr::null();
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let _ = &data as *const *const ();
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if data.is_null() {}
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}
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src/test/ui/inference-variable-behind-raw-pointer.stderr
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src/test/ui/inference-variable-behind-raw-pointer.stderr
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warning[E0619]: the type of this value must be known in this context
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--> $DIR/inference-variable-behind-raw-pointer.rs:14:13
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14 | if data.is_null() {}
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| ^^^^^^^
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= note: this will be made into a hard error in a future version of the compiler
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