Bug 22889 – Selective import shadows local variable

As of DMD 2.099.0, the following program compiles and runs without error: --- lib.d int x = 1; --- main.d void main() { int x = 2; { import lib : x; assert(x == 1); } } --- The language spec [1] states that name lookup proceeds in two phases: first, symbols in the current module and inherited scopes are considered; second, imported symbols are considered. It is not stated explicitly whether selectively-imported symbols are considered in phase 1 or phase 2. If selectively-imported symbols are considered in phase 1, the above program should yield a compile-time error, because symbols are not permitted to shadow other symbols declared in the same function. If selectively-imported symbols are considered in phase 2, the above program should yield a runtime error, because the local `x` should hide the imported `x`. Either way, the observed behavior cannot possibly be correct. [1] https://dlang.org/spec/module.html#name_lookup

isn't x with 2 as value hidden on purpose ?

ah I see the problem now, the x that has 2 for value cant be used anymore. No way to fully qualify it.

Note that the following similar program does NOT compile: --- lib.d int x = 1; --- main.d void main() { int x = 2; { import lib; alias x = lib.x; assert(x == 1); } } --- The error given is --- main.d(6): Error: alias `x` is shadowing variable `main.main.x` ---

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