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Code Issues 1 Releases Wiki Activity

Avoid panicking when calling :missing-symbol lookup function

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Michael Camilleri 2022-01-23 17:29:52 +09:00
parent ed5c1dfc3c
commit d396180939
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GPG Key ID: 7EB218A48DF8B572
1 changed files with 10 additions and 3 deletions
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src/core/util.c
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@ -608,10 +608,17 @@ JanetBinding janet_resolve_ext(JanetTable *env, const uint8_t *sym) {
/* Check environment for entry */ /* Check environment for entry */
if (!janet_checktype(entry, JANET_TABLE)) { if (!janet_checktype(entry, JANET_TABLE)) {
Janet fn_entry = janet_table_get(env, janet_ckeywordv("missing-symbol")); Janet lookup_entry = janet_table_get(env, janet_ckeywordv("missing-symbol"));
if (janet_checktype(fn_entry, JANET_FUNCTION)) { if (janet_checktype(lookup_entry, JANET_FUNCTION)) {
JanetFunction *lookup = janet_unwrap_function(lookup_entry);
Janet args[2] = { janet_wrap_symbol(sym), janet_wrap_table(env) }; Janet args[2] = { janet_wrap_symbol(sym), janet_wrap_table(env) };
entry = janet_call(janet_unwrap_function(fn_entry), 2, args); JanetFiber *fiberp = janet_fiber(lookup, 64, 2, args);
if (NULL == fiberp) return binding;
fiberp->env = env;
int lock = janet_gclock();
JanetSignal status = janet_continue(fiberp, janet_wrap_nil(), &entry);
janet_gcunlock(lock);
if (status != JANET_SIGNAL_OK) return binding;
} }
if (!janet_checktype(entry, JANET_TABLE)) return binding; if (!janet_checktype(entry, JANET_TABLE)) return binding;
} }