binding-type"><a href="https://github.com/janet-lang/janet/blob/894cd0e/src/core/fiber.c#L502">source</a></span> <pre class="binding-text">(fiber/new func &amp;opt sigmask)

Create a new fiber with function body func. Can optionally take a set of signals to block from the current parent fiber when called. The mask is specified as a keyword where each character is used to indicate a signal to block. If the ev module is enabled, and this fiber is used as an argument to `ev/go`, these "blocked" signals will re