stage1: Fix crash in *[N]T to []T conversion with zst
Prevent the crash by not making the codegen try to access the non-existing ptr field in the slice. Closes #6951master
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3bc1c719bd
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f91df39ad2
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@ -3343,7 +3343,7 @@ static LLVMValueRef ir_render_ptr_of_array_to_slice(CodeGen *g, IrExecutableGen
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LLVMValueRef expr_val = ir_llvm_value(g, instruction->operand);
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LLVMValueRef slice_start_ptr = LLVMBuildInBoundsGEP(g->builder, expr_val, indices, 2, "");
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gen_store_untyped(g, slice_start_ptr, ptr_field_ptr, 0, false);
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} else if (ir_want_runtime_safety(g, &instruction->base)) {
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} else if (ir_want_runtime_safety(g, &instruction->base) && ptr_index != SIZE_MAX) {
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LLVMValueRef ptr_field_ptr = LLVMBuildStructGEP(g->builder, result_loc, ptr_index, "");
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gen_undef_init(g, slice_ptr_type, slice_ptr_type, ptr_field_ptr);
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}
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@ -908,3 +908,9 @@ test "cast from ?[*]T to ??[*]T" {
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const a: ??[*]u8 = @as(?[*]u8, null);
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expect(a != null and a.? == null);
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}
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test "cast between *[N]void and []void" {
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var a: [4]void = undefined;
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var b: []void = &a;
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expect(b.len == 4);
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}
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