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fix(frontends/lean): unprotected call to Lua API

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Signed-off-by: Leonardo de Moura <leonardo@microsoft.com>
This commit is contained in:
Leonardo de Moura 2014-01-09 19:56:20 -08:00
parent 411f14415d
commit 65bdb9c7e0
3 changed files with 10 additions and 3 deletions
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5
src/frontends/lean/parser_expr.cpp
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@ -844,11 +844,10 @@ tactic parser_imp::parse_tactic_expr() {
if (curr() == scanner::token::ScriptBlock) {
parse_script_expr();
return using_script([&](lua_State * L) {
try {
if (is_tactic(L, -1))
return to_tactic(L, -1);
} catch (...) {
else
throw parser_error("invalid script-block, it must return a tactic", p);
}
});
} else if (curr_is_identifier() && m_tactic_macros && m_tactic_macros->find(curr_name()) != m_tactic_macros->end()) {
return parse_tactic_macro(curr_name(), p);

2
tests/lean/tacluacrash.lean Normal file
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@ -0,0 +1,2 @@
theorem T (a : Bool) : a → a.
(* foo_tac *)

6
tests/lean/tacluacrash.lean.expected.out Normal file
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@ -0,0 +1,6 @@
Set: pp::colors
Set: pp::unicode
tacluacrash.lean:2:0: error: invalid script-block, it must return a tactic
tacluacrash.lean:3:0: error: invalid tactic command, unexpected end of file
Proof state:
a : Bool, H : a ⊢ a