Merge branch 'frmdstryr-import-empty-file'

src/stage1.zig

@@ -428,5 +428,7 @@ export fn stage2_fetch_file(
     const max_file_size = std.math.maxInt(u32);
     const contents = comp.stage1_cache_manifest.addFilePostFetch(file_path, max_file_size) catch return null;
     result_len.* = contents.len;
+    // TODO https://github.com/ziglang/zig/issues/3328#issuecomment-716749475
+    if (contents.len == 0) return @intToPtr(?[*]const u8, 0x1);
     return contents.ptr;
 }

src/stage1/analyze.cpp

@@ -1988,7 +1988,7 @@ static ZigType *analyze_fn_type(CodeGen *g, AstNode *proto_node, Scope *child_sc
             // behaviour when checking expected alignment with `@ptrToInt(fn_ptr)`
             // or similar. This commit proposes to make `align` expressions a
             // compile error when compiled to Wasm architecture.
-            // 
+            //
             // Some references:
             // [1] [Mozilla: WebAssembly Tables](https://developer.mozilla.org/en-US/docs/WebAssembly/Understanding_the_text_format#WebAssembly_tables)
             // [2] [Sunfishcode's Wasm Ref Manual](https://github.com/sunfishcode/wasm-reference-manual/blob/master/WebAssembly.md#indirect-call)
@@ -9044,7 +9044,7 @@ static void resolve_llvm_types_optional(CodeGen *g, ZigType *type, ResolveStatus
                 8 * child_type->abi_align,
                 val_offset_in_bits,
                 ZigLLVM_DIFlags_Zero, child_llvm_di_type);
-    di_element_types[maybe_null_index] = 
+    di_element_types[maybe_null_index] =
         ZigLLVMCreateDebugMemberType(g->dbuilder, ZigLLVMTypeToScope(type->llvm_di_type),
                 "maybe", di_file, line,
                 8*g->builtin_types.entry_bool->abi_size,

test/stage1/behavior/import.zig

@@ -16,3 +16,7 @@ test "import in non-toplevel scope" {
     };
     expectEqual(@as(i32, 1234), S.foo());
 }
+
+test "import empty file" {
+    const empty = @import("import/empty.zig");
+}