https://issues.dlang.org/show_bug.cgi?id=20309
Issue ID: 20309
Summary: Passing alias this with function returning chain to
tempCString hangs up the program
Product: D
Version: D2
Hardware: x86_64
OS: Linux
Status: NEW
Severity: major
Priority: P1
Component: phobos
Assignee: [email protected]
Reporter: [email protected]
The following minimal test case will result in a binary which hangs up:
import std.range : chain;
import std.internal.cstring : tempCString;
struct Test {
auto filename() const { return chain("a", "b"); }
alias filename this;
}
void main() {
auto name = Test();
auto namez = name.tempCString!char();
// should return fine or crash if doesn't exist, but not hang
}
See https://run.dlang.io/is/8AlJO5
This is a bug because with `name.filename.tempCString!char()` it works fine, so
it has an issue with the alias this on that range.
This causes calls to the std.file functions like isFile or getAttributes to
hang up if called with a struct like this.
This only happens when it is indirected via an alias this on the argument which
is passed.
Another test to test it with public APIs: `std.file.getAttributes(Test())`
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