the following code causes gdc to segfault:

  void a () {
    scope(failure) import std.file : remove;
    ;
  }

observations:

only 'failure' faults; 'success' or 'exit' does not.

any ':'-import will do. create module 'b' with function 'f', and 'import b :
f;' will segfault.

that lone semicolon matters. remove it and segfault will disappear.

'scope(failure) { import … }' segfaults too.

simple 'import std.file;' does not segfault.

actually, lone semicolon can be anything: variable declaration, function call,
operator, etc.