V8 reserves an 8 GiB guard region per wasm memory inside its 1 TiB sandbox,
so an Electron renderer can hold only ~124 live wasm memories regardless of
free RAM. @xterm/addon-image instantiated a SIXEL decoder per terminal at
activation (and kept IIP decoders after the first image), so ~120+ terminals
exhausted the budget: new panes raised 'WebAssembly.instantiate(): Out of
memory' rejections, and the next Kitty/IIP image threw 'WebAssembly.Memory():
could not allocate memory' out of the parser, permanently wedging that
terminal's write queue.
The addon-image source patch now borrows SIXEL decoders from a shared pool
only while a sequence is open (color registers stay on the terminal), drops
IIP decoders after each image, and turns a failed decoder allocation into a
dropped image instead of a parser throw. Bundles regenerated with
regenerate-xterm-patches.mjs --write.
Co-authored-by: m4air <m4air@m4airs-Air.localdomain>
OrcaWinandm4air
e1362ada4c