fix(treesitter): give each wasm parser its own TSWasmStore #40163

All wasm parsers shared a single global TSWasmStore via
ts_parser_set_wasm_store(). A TSWasmStore is owned by exactly one parser:
ts_parser_delete() frees it through ts_wasm_store_delete(). So the first
wasm parser collected freed the shared store, leaving the global pointer
dangling, and creating the next wasm parser dereferenced freed memory in
ts_wasm_store_reset() -> wasmtime_store_context(), crashing with SIGSEGV.

Give each parser its own store via ts_wasm_store_new() instead. This is
the 1:1 store-per-parser model intended by tree-sitter (see
tree-sitter/tree-sitter#3454): the global store remains only as the
language loader, ts_parser_delete() cleanly frees each parser's own
store, and the wasm engine is shared safely because ts_wasm_store_new()
clones its engine reference internally.

AI-assisted: Claude Code

0 files changed, 0 insertions, 0 deletions