std: define error set of toPosixPath

Author: Vexu

lib/std/dynamic_library.zig

@@ -414,7 +414,7 @@ pub const WindowsDynLib = struct {
 };
 
 pub const DlDynLib = struct {
-    pub const Error = error{FileNotFound};
+    pub const Error = error{ FileNotFound, NameTooLong };
 
     handle: *anyopaque,
 

lib/std/os.zig

@@ -5979,7 +5979,7 @@ pub fn sched_getaffinity(pid: pid_t) SchedGetAffinityError!cpu_set_t {
 
 /// Used to convert a slice to a null terminated slice on the stack.
 /// TODO https://github.com/ziglang/zig/issues/287
-pub fn toPosixPath(file_path: []const u8) ![MAX_PATH_BYTES - 1:0]u8 {
+pub fn toPosixPath(file_path: []const u8) error{NameTooLong}![MAX_PATH_BYTES - 1:0]u8 {
     if (std.debug.runtime_safety) assert(std.mem.indexOfScalar(u8, file_path, 0) == null);
     var path_with_null: [MAX_PATH_BYTES - 1:0]u8 = undefined;
     // >= rather than > to make room for the null byte