5 files changed, 15 insertions, 2 deletions
diff --git a/pit/src/main.c b/pit/src/main.c
index 74c2f03..157ad87 100644
--- a/pit/src/main.c
+++ b/pit/src/main.c
@@ -8,7 +8,7 @@
 #include <lcq/pit/library.h>
 
 int main(int argc, char **argv) {
-    i64 sz = 4 * 1024 * 1024;
+    i64 sz = 256 * 1024 * 1024;
     u8 *buf = malloc((size_t) sz);
     pit_runtime *rt = pit_runtime_new(buf, sz);
     pit_install_library_essential(rt);
diff --git a/pit/src/runtime/eval.c b/pit/src/runtime/eval.c
index b0b53b6..a2b9e79 100644
--- a/pit/src/runtime/eval.c
+++ b/pit/src/runtime/eval.c
@@ -180,8 +180,11 @@ bool pit_vm_run_one(pit_runtime *rt) {
 pit_value pit_vm_eval(pit_runtime *rt, pit_value v) {
     i64 start = rt->callstack->next;
     vm_push_code(rt, v);
+    i64 gc = 0;
     while (pit_vm_run_one(rt) && rt->callstack->next > start) {
-        if (rt->expr_stack->next == 0 && rt->compilation_stack->next == 0) {
+        gc += 1;
+        if (gc > 100 && rt->expr_stack->next == 0 && rt->compilation_stack->next == 0) {
+            gc = 0;
             pit_gc(rt); /* TODO hack to avoid running GC during macroexpansion */
         }
     }
diff --git a/pit/src/runtime/gc.c b/pit/src/runtime/gc.c
index e96e36b..119861a 100644
--- a/pit/src/runtime/gc.c
+++ b/pit/src/runtime/gc.c
@@ -29,6 +29,7 @@ static pit_value gc_copy_value(pit_runtime *rt, pit_value v) {
 }
 // #include <stdio.h>
 void pit_gc(pit_runtime *rt) {
+    return;
     // fprintf(stderr, "running gc: heap size is %ld\n", rt->heap->next);
     rt->frozen_values = 0;
     rt->frozen_symtab = 0;
diff --git a/pit/src/runtime/symtab.c b/pit/src/runtime/symtab.c
index ca4ecf2..5684074 100644
--- a/pit/src/runtime/symtab.c
+++ b/pit/src/runtime/symtab.c
@@ -104,8 +104,12 @@ void pit_symtab_symbol_mark_special_form(pit_runtime *rt, pit_value sym) {
     if (!ent) { pit_error(rt, "bad symbol"); return; }
     ent->is_special_form = true;
 }
+#include <stdio.h>
 void pit_symtab_bind(pit_runtime *rt, pit_value sym, pit_value cell) {
     /* although we cannot set frozen symbols, we can still bind them temporarily - no need to check */
+    fprintf(stderr, "binding "); pit_dump_to_file(rt, stderr, sym, false);
+    fprintf(stderr, " to "); pit_dump_to_file(rt, stderr, cell, false);
+    fprintf(stderr, "\n");
     pit_symtab_entry *ent = pit_symtab_lookup(rt, sym);
     if (!ent) { pit_error(rt, "bad symbol"); return; }
     if (pit_vec_push(pit_value)(rt->saved_bindings, ent->value) < 0) pit_error(rt, "binding stack overflow");
@@ -115,6 +119,9 @@ pit_value pit_symtab_unbind(pit_runtime *rt, pit_value sym) {
     pit_symtab_entry *ent = pit_symtab_lookup(rt, sym);
     if (!ent) { pit_error(rt, "bad symbol"); return PIT_NIL; }
     pit_value old = ent->value;
+    fprintf(stderr, "unbinding "); pit_dump_to_file(rt, stderr, sym, false);
+    fprintf(stderr, " (was "); pit_dump_to_file(rt, stderr, old, false);
+    fprintf(stderr, ")\n");
     if (pit_vec_pop(pit_value)(rt->saved_bindings, &ent->value) < 0) pit_error(rt, "binding stack underflow");
     return old;
 }
diff --git a/pit/src/runtime/value/cell.c b/pit/src/runtime/value/cell.c
index 34b9226..2a99ce2 100644
--- a/pit/src/runtime/value/cell.c
+++ b/pit/src/runtime/value/cell.c
@@ -11,11 +11,13 @@ pit_value pit_value_cell_new(pit_runtime *rt, pit_value v) {
     h->in.cell = v;
     return ret;
 }
+#include <stdio.h>
 pit_value pit_value_cell_get(pit_runtime *rt, pit_value cell, pit_value sym) {
     if (pit_value_sort(cell) != PIT_VALUE_SORT_REF) {
         char buf[256];
         i64 end = pit_dump(rt, buf, sizeof(buf) - 1, sym, false);
         buf[end] = 0;
+        fprintf(stderr, "attempted to get unbound variable/function: %s\n", buf);
         pit_error(rt, "attempted to get unbound variable/function: %s", buf);
         return PIT_NIL;
     }