Assertion fail, when using var that could not be inferred in array type.

[Hejsil]

Zig version: 0.1.1.92fc5947

var v = 25;

test "" {
    var arr: [v]u8 = undefined;
}

zig: zig/src/ir.cpp:6164: bool ir_num_lit_fits_in_other_type(IrAnalyze*, IrInstruction*, TypeTableEntry*, bool): Assertion `const_val->special != ConstValSpecialRuntime' failed.
zsh: abort (core dumped)  zig test test.zig

• If we change line 1 to var v : u8 = 25; we get the expected error: unable to evaluate constant expression.
• Changing line 1 to const v = 25; and our program compiles, as expected.