rust/tests/ui/span/regions-escape-loop-via-variable.rs

fn main() {
    let x = 3;

    // Here, the variable `p` gets inferred to a type with a lifetime
    // of the loop body.  The regionck then determines that this type
    // is invalid.
    let mut p = &x;

    loop {
        let x = 1 + *p;
        p = &x;
    }
    //~^^ ERROR `x` does not live long enough
}
check if the type of a local variable contains illegal region also, try to suppress some of the duplicate errors---in general more work is needed to make these error messages comprehensible to ordinary humans 2012-05-15 21:19:35 -07:00			`fn main() {`
Kill more `isize`s 2015-01-31 17:23:42 +01:00			`let x = 3;`
check if the type of a local variable contains illegal region also, try to suppress some of the duplicate errors---in general more work is needed to make these error messages comprehensible to ordinary humans 2012-05-15 21:19:35 -07:00
			// Here, the variable `p` gets inferred to a type with a lifetime
			`// of the loop body. The regionck then determines that this type`
			`// is invalid.`
Fix #2979: inference for lifetimes of & expressions What we now do is to create a region variable for each & expression (and also each borrow). The lifetime of this variable will be checked by borrowck to ensure it is not greater than the lifetime of the underlying data. This both leads to shorter lifetimes in some cases but also longer in others, such as taking the address to the interior of unique boxes tht are rooted in region pointers (e.g., returning a pointer to the interior of a sendable map). This may lead to issue #2977 if the rvalue is not POD, because we may drop the data in trans sooner than borrowck expects us to. Need to work out precisely where that fix ought to occur. 2012-07-26 08:51:57 -07:00			`let mut p = &x;`
check if the type of a local variable contains illegal region also, try to suppress some of the duplicate errors---in general more work is needed to make these error messages comprehensible to ordinary humans 2012-05-15 21:19:35 -07:00
			`loop {`
Kill more `isize`s 2015-01-31 17:23:42 +01:00			`let x = 1 + *p;`
Merge cfail and ui tests into ui tests 2017-11-20 13:13:27 +01:00			`p = &x;`
Point at var in short lived borrows 2017-12-13 17:27:23 -08:00			`}`
			//~^^ ERROR `x` does not live long enough
check if the type of a local variable contains illegal region also, try to suppress some of the duplicate errors---in general more work is needed to make these error messages comprehensible to ordinary humans 2012-05-15 21:19:35 -07:00			`}`