* [COMMITTED] gccrs: Add guards against getting data from an empty vector
@ 2023-01-31 13:25 Arthur Cohen
0 siblings, 0 replies; only message in thread
From: Arthur Cohen @ 2023-01-31 13:25 UTC (permalink / raw)
To: gcc-patches; +Cc: gcc-rust, Philip Herron
From: Philip Herron <philip.herron@embecosm.com>
gcc/rust/ChangeLog:
* typecheck/rust-tyctx.cc (TypeCheckContext::pop_return_type): Add
guards around `std::vector<T>.pop_back()`.
(TypeCheckContext::peek_context): Likewise for `std::vector<T>.back()`.
Tested on x86_64-pc-linux-gnu, committed on master.
---
gcc/rust/typecheck/rust-tyctx.cc | 2 ++
1 file changed, 2 insertions(+)
diff --git a/gcc/rust/typecheck/rust-tyctx.cc b/gcc/rust/typecheck/rust-tyctx.cc
index ad5f67cc1dd..af86b064c6c 100644
--- a/gcc/rust/typecheck/rust-tyctx.cc
+++ b/gcc/rust/typecheck/rust-tyctx.cc
@@ -142,12 +142,14 @@ TypeCheckContext::push_return_type (TypeCheckContextItem item,
void
TypeCheckContext::pop_return_type ()
{
+ rust_assert (!return_type_stack.empty ());
return_type_stack.pop_back ();
}
TypeCheckContextItem &
TypeCheckContext::peek_context ()
{
+ rust_assert (!return_type_stack.empty ());
return return_type_stack.back ().first;
}
--
2.39.1
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