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digitalmars.D.bugs - [Issue 18030] New: Segmentation fault with __traits(getProtection)


          Issue ID: 18030
           Summary: Segmentation fault with __traits(getProtection) on
                    template function.
           Product: D
           Version: D2
          Hardware: x86_64
                OS: Linux
            Status: NEW
          Severity: regression
          Priority: P1
         Component: dmd
          Assignee: nobody puremagic.com
          Reporter: dmdreport123 yandex.ru

The following code causes dmd to crash with a segmentation fault:
struct S(T)
        T var;
                "Inside S: func() is ",
                __traits(getProtection, __traits(getMember, T, "func"))

class C
        alias Al = S!C;

        static int func(U)(U var)
                return 123;
                "Inside C: func() is ",
                __traits(getProtection, __traits(getMember, C, "func"))

void main() {}
$ dmd app.d
Inside S: func() is Segmentation fault

This error first appeared in dmd2.075.

Here is a simple test project on github and tests results from travis-ci.

If C.func() has no template parameters or __traits(getProtection) is not called
inside struct S, then the code compiles. Calling __traits(getProtection) inside
class C does not result in a segfault. Whether S and C are classes or structs
does not affect this error.

Dec 04 2017