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-rw-r--r--src/stage1/codegen.cpp2
1 files changed, 1 insertions, 1 deletions
diff --git a/src/stage1/codegen.cpp b/src/stage1/codegen.cpp
index 6a02f2912b..d308522943 100644
--- a/src/stage1/codegen.cpp
+++ b/src/stage1/codegen.cpp
@@ -3343,7 +3343,7 @@ static LLVMValueRef ir_render_ptr_of_array_to_slice(CodeGen *g, IrExecutableGen
LLVMValueRef expr_val = ir_llvm_value(g, instruction->operand);
LLVMValueRef slice_start_ptr = LLVMBuildInBoundsGEP(g->builder, expr_val, indices, 2, "");
gen_store_untyped(g, slice_start_ptr, ptr_field_ptr, 0, false);
- } else if (ir_want_runtime_safety(g, &instruction->base)) {
+ } else if (ir_want_runtime_safety(g, &instruction->base) && ptr_index != SIZE_MAX) {
LLVMValueRef ptr_field_ptr = LLVMBuildStructGEP(g->builder, result_loc, ptr_index, "");
gen_undef_init(g, slice_ptr_type, slice_ptr_type, ptr_field_ptr);
}