codegen.c: avoid integer overflow.

7552b932 · Yukihiro "Matz" Matsumoto · 28c4f2f6 · 7552b932
Unverified Commit 7552b932 authored Sep 05, 2021 by Yukihiro "Matz" Matsumoto
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mrbgems/mruby-compiler/core/codegen.c mrbgems/mruby-compiler/core/codegen.c +1 -0

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--- a/mrbgems/mruby-compiler/core/codegen.c
+++ b/mrbgems/mruby-compiler/core/codegen.c
@@ -1128,6 +1128,7 @@ gen_uniop(codegen_scope *s, mrb_sym sym, uint16_t dst)
    /* unary plus does nothing */
  }
  else if (sym == MRB_OPSYM_2(s->mrb, minus)) {
+    if (n == MRB_INT_MIN) return FALSE;
    n = -n;
  }
  else if (sym == MRB_OPSYM_2(s->mrb, neg)) {