diff --git a/core/c/c.odin b/core/c/c.odin
index d135fa93c..139d9920a 100644
--- a/core/c/c.odin
+++ b/core/c/c.odin
@@ -3,6 +3,8 @@ package c
 import builtin "core:builtin"
 
 char           :: builtin.u8  // assuming -funsigned-char
+
+schar          :: builtin.i8
 short          :: builtin.i16
 int            :: builtin.i32
 long           :: builtin.i32 when (ODIN_OS == "windows" || size_of(builtin.rawptr) == 4) else builtin.i64
diff --git a/core/c/frontend/preprocessor/preprocess.odin b/core/c/frontend/preprocessor/preprocess.odin
index 62b4183bc..9651cc81c 100644
--- a/core/c/frontend/preprocessor/preprocess.odin
+++ b/core/c/frontend/preprocessor/preprocess.odin
@@ -956,7 +956,7 @@ substitute_token :: proc(cpp: ^Preprocessor, tok: ^Token, args: ^Macro_Arg) -> ^
 			continue
 		}
 
-		if tok.lit == "__VA__OPT__" && tok.next.lit == "(" {
+		if tok.lit == "__VA_OPT__" && tok.next.lit == "(" {
 			opt_arg := read_macro_arg_one(cpp, &tok, tok.next.next, true)
 			if has_varargs(args) {
 				for t := opt_arg.tok; t.kind != .EOF; t = t.next {
diff --git a/core/c/libc/types.odin b/core/c/libc/types.odin
index 7199cf57b..a49e52fb6 100644
--- a/core/c/libc/types.odin
+++ b/core/c/libc/types.odin
@@ -3,6 +3,8 @@ package libc
 import "core:c"
 
 char           :: c.char // assuming -funsigned-char
+
+schar          :: c.schar
 short          :: c.short
 int            :: c.int
 long           :: c.long
diff --git a/core/math/linalg/glsl/linalg_glsl.odin b/core/math/linalg/glsl/linalg_glsl.odin
index 3b4976452..053182794 100644
--- a/core/math/linalg/glsl/linalg_glsl.odin
+++ b/core/math/linalg/glsl/linalg_glsl.odin
@@ -1597,7 +1597,7 @@ quatNlerp :: proc "c" (a, b: quat, t: f32) -> (c: quat) {
 	c.y = a.y + (b.y-a.y)*t
 	c.z = a.z + (b.z-a.z)*t
 	c.w = a.w + (b.w-a.w)*t
-	return c/builtin.abs(c)
+	return c/quat(builtin.abs(c))
 }
 
 quatSlerp :: proc "c" (x, y: quat, t: f32) -> (q: quat) {
@@ -1699,7 +1699,7 @@ dquatNlerp :: proc "c" (a, b: dquat, t: f64) -> (c: dquat) {
 	c.y = a.y + (b.y-a.y)*t
 	c.z = a.z + (b.z-a.z)*t
 	c.w = a.w + (b.w-a.w)*t
-	return c/builtin.abs(c)
+	return c/dquat(builtin.abs(c))
 }
 
 dquatSlerp :: proc "c" (x, y: dquat, t: f64) -> (q: dquat) {
diff --git a/core/odin/doc-format/doc_format.odin b/core/odin/doc-format/doc_format.odin
index c80be2489..83cd89ca2 100644
--- a/core/odin/doc-format/doc_format.odin
+++ b/core/odin/doc-format/doc_format.odin
@@ -11,7 +11,7 @@ String :: distinct Array(byte)
 
 Version_Type_Major :: 0
 Version_Type_Minor :: 2
-Version_Type_Patch :: 1
+Version_Type_Patch :: 2
 
 Version_Type :: struct {
 	major, minor, patch: u8,
@@ -242,6 +242,8 @@ Type :: struct {
 	polymorphic_params: Type_Index,
 	// Used By: .Struct, .Union
 	where_clauses: Array(String),
+	// Used By: .Struct
+	tags: Array(String),
 }
 
 Type_Flags_Basic :: distinct bit_set[Type_Flag_Basic; u32le]
diff --git a/core/os/os_darwin.odin b/core/os/os_darwin.odin
index d40c80aeb..b32453a5d 100644
--- a/core/os/os_darwin.odin
+++ b/core/os/os_darwin.odin
@@ -296,6 +296,8 @@ foreign libc {
 	@(link_name="readdir_r$INODE64") _unix_readdir_r    :: proc(dirp: Dir, entry: ^Dirent, result: ^^Dirent) -> c.int ---
 	@(link_name="fcntl")            _unix_fcntl         :: proc(fd: Handle, cmd: c.int, buf: ^byte) -> c.int ---
 
+	@(link_name="fchmod") _unix_fchmod :: proc(fildes: Handle, mode: u16) -> c.int ---;
+
 	@(link_name="malloc")   _unix_malloc   :: proc(size: int) -> rawptr ---
 	@(link_name="calloc")   _unix_calloc   :: proc(num, size: int) -> rawptr ---
 	@(link_name="free")     _unix_free     :: proc(ptr: rawptr) ---
@@ -305,6 +307,8 @@ foreign libc {
 	@(link_name="chdir")    _unix_chdir    :: proc(buf: cstring) -> c.int ---
 	@(link_name="realpath") _unix_realpath :: proc(path: cstring, resolved_path: rawptr) -> rawptr ---
 
+	@(link_name="strerror") _darwin_string_error :: proc(num : c.int) -> cstring ---;
+
 	@(link_name="exit")    _unix_exit :: proc(status: c.int) -> ! ---
 }
 
@@ -319,16 +323,35 @@ get_last_error :: proc() -> int {
 	return __error()^
 }
 
-open :: proc(path: string, flags: int = O_RDONLY, mode: int = 0) -> (Handle, Errno) {
+get_last_error_string :: proc() -> string {
+	return cast(string)_darwin_string_error(cast(c.int)get_last_error());
+}
+
+open :: proc(path: string, flags: int = O_RDWR, mode: int = 0) -> (Handle, Errno) {
 	cstr := strings.clone_to_cstring(path)
 	handle := _unix_open(cstr, i32(flags), u16(mode))
 	delete(cstr)
 	if handle == -1 {
 		return INVALID_HANDLE, 1
 	}
+
+when  ODIN_OS == "darwin" && ODIN_ARCH == "arm64" {
+	if mode != 0 {
+		err := fchmod(handle, cast(u16)mode)
+		if err != 0 {
+			_unix_close(handle)
+			return INVALID_HANDLE, 1
+		}
+	}
+}
+
 	return handle, 0
 }
 
+fchmod :: proc(fildes: Handle, mode: u16) -> Errno {
+	return cast(Errno)_unix_fchmod(fildes, mode)
+}
+
 close :: proc(fd: Handle) {
 	_unix_close(fd)
 }
diff --git a/src/check_expr.cpp b/src/check_expr.cpp
index 67e2f3bd7..cfffffd9f 100644
--- a/src/check_expr.cpp
+++ b/src/check_expr.cpp
@@ -7688,6 +7688,14 @@ ExprKind check_expr_base_internal(CheckerContext *c, Operand *o, Ast *node, Type
 				}
 			}
 
+			if (t->kind == Type_Matrix) {
+				if (cl->elems.count > 0 && cl->elems[0]->kind != Ast_FieldValue) {
+					if (0 < max && max < max_type_count) {
+						error(node, "Expected %lld values for this matrix literal, got %lld", cast(long long)max_type_count, cast(long long)max);
+					}
+				}
+			}
+
 			break;
 		}
 
diff --git a/src/check_type.cpp b/src/check_type.cpp
index b4f30d2f0..282da4d0a 100644
--- a/src/check_type.cpp
+++ b/src/check_type.cpp
@@ -922,20 +922,19 @@ void check_bit_set_type(CheckerContext *c, Type *type, Type *named_type, Ast *no
 		i64 lower = big_int_to_i64(&i);
 		i64 upper = big_int_to_i64(&j);
 		
-		bool lower_changed = false;
+		i64 actual_lower = lower;
 		i64 bits = MAX_BITS;
 		if (type->BitSet.underlying != nullptr) {
 			bits = 8*type_size_of(type->BitSet.underlying);
 			
 			if (lower > 0) {
-				lower = 0;
-				lower_changed = true;
+				actual_lower = 0;
 			} else if (lower < 0) {
 				error(bs->elem, "bit_set does not allow a negative lower bound (%lld) when an underlying type is set", lower);
 			}
 		}
 
-		i64 bits_required = upper-lower;
+		i64 bits_required = upper-actual_lower;
 		switch (be->op.kind) {
 		case Token_Ellipsis:
 		case Token_RangeFull:
@@ -959,7 +958,7 @@ void check_bit_set_type(CheckerContext *c, Type *type, Type *named_type, Ast *no
 			break;
 		}
 		if (!is_valid) {
-			if (lower_changed) {
+			if (actual_lower != lower) {
 				error(bs->elem, "bit_set range is greater than %lld bits, %lld bits are required (internal the lower changed was changed 0 as an underlying type was set)", bits, bits_required);
 			} else {
 				error(bs->elem, "bit_set range is greater than %lld bits, %lld bits are required", bits, bits_required);
diff --git a/src/docs_format.cpp b/src/docs_format.cpp
index 1c3af6257..5cfac4817 100644
--- a/src/docs_format.cpp
+++ b/src/docs_format.cpp
@@ -15,7 +15,7 @@ struct OdinDocVersionType {
 
 #define OdinDocVersionType_Major 0
 #define OdinDocVersionType_Minor 2
-#define OdinDocVersionType_Patch 1
+#define OdinDocVersionType_Patch 2
 
 struct OdinDocHeaderBase {
 	u8                 magic[8];
@@ -137,6 +137,7 @@ struct OdinDocType {
 	OdinDocArray<OdinDocEntityIndex> entities;
 	OdinDocTypeIndex polmorphic_params;
 	OdinDocArray<OdinDocString> where_clauses;
+	OdinDocArray<OdinDocString> tags; // struct field tags
 };
 
 struct OdinDocAttribute {
diff --git a/src/docs_writer.cpp b/src/docs_writer.cpp
index e8e8892ec..56ad0561e 100644
--- a/src/docs_writer.cpp
+++ b/src/docs_writer.cpp
@@ -598,6 +598,15 @@ OdinDocTypeIndex odin_doc_type(OdinDocWriter *w, Type *type) {
 				}
 				doc_type.where_clauses = odin_doc_where_clauses(w, st->where_clauses);
 			}
+
+			auto tags = array_make<OdinDocString>(heap_allocator(), type->Struct.fields.count);
+			defer (array_free(&tags));
+
+			for_array(i, type->Struct.fields) {
+				tags[i] = odin_doc_write_string(w, type->Struct.tags[i]);
+			}
+
+			doc_type.tags = odin_write_slice(w, tags.data, tags.count);
 		}
 		break;
 	case Type_Union:
diff --git a/src/llvm_backend_stmt.cpp b/src/llvm_backend_stmt.cpp
index 016e464b8..20b444058 100644
--- a/src/llvm_backend_stmt.cpp
+++ b/src/llvm_backend_stmt.cpp
@@ -2188,6 +2188,7 @@ void lb_build_stmt(lbProcedure *p, Ast *node) {
 			lb_emit_defer_stmts(p, lbDeferExit_Branch, block);
 		}
 		lb_emit_jump(p, block);
+		lb_start_block(p, lb_create_block(p, "unreachable"));
 	case_end;
 	}
 }
diff --git a/vendor/microui/microui.odin b/vendor/microui/microui.odin
index 9d3e01fa0..947f59f40 100644
--- a/vendor/microui/microui.odin
+++ b/vendor/microui/microui.odin
@@ -1030,9 +1030,7 @@ number_textbox :: proc(ctx: ^Context, value: ^Real, r: Rect, id: Id, fmt_string:
 	if ctx.number_edit_id == id {
 		res := textbox_raw(ctx, ctx.number_edit_buf[:], &ctx.number_edit_len, id, r, {})
 		if .SUBMIT in res || ctx.focus_id != id {
-			ok: bool
-			value^, ok = parse_real(string(ctx.number_edit_buf[:ctx.number_edit_len]))
-			assert(ok == true)
+			value^, _ = parse_real(string(ctx.number_edit_buf[:ctx.number_edit_len]))
 			ctx.number_edit_id = 0
 		} else {
 			return true