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* [gcc r13-5546] gccrs: Add guards against getting data from an empty vector
@ 2023-01-31 13:15 Arthur Cohen
  0 siblings, 0 replies; only message in thread
From: Arthur Cohen @ 2023-01-31 13:15 UTC (permalink / raw)
  To: gcc-cvs

https://gcc.gnu.org/g:245ce6f26a1688ad69a1802ec50fa865db409eec

commit r13-5546-g245ce6f26a1688ad69a1802ec50fa865db409eec
Author: Philip Herron <philip.herron@embecosm.com>
Date:   Fri Aug 26 20:52:35 2022 +0100

    gccrs: Add guards against getting data from an empty vector
    
    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()`.

Diff:
---
 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;
 }

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