HI Jason,
On Fri, 5 Jul 2024 at 17:31, Jason Merrill <ja...@redhat.com> wrote:
>
> On 7/5/24 10:25 AM, Nina Dinka Ranns wrote:
> > Certain places in contract parsing currently do not check for errors.
> > This results in contracts
> > with embedded errors which eventually confuse gimplify. Checks for
> > errors added in
> > grok_contract() and cp_parser_contract_attribute_spec() to exit early
> > if an error is encountered.
>
> Thanks for the patch!
>
> > Tested on x86_64-pc-linux-gnu
> > ---
> >
> > PR c++/113968
> >
> > gcc/cp/ChangeLog:
> >
> > * contracts.cc (grok_contract): Check for error_mark_node early
> > exit
>
> These hunks are OK.
>
> > * parser.cc (cp_parser_contract_attribute_spec): Check for
> > error_mark_node early exit
>
> This seems redundant, since finish_contract_attribute already checks for
> error_mark_node and we're returning its result unchanged.
good catch, removed.
>
> Also, the convention is for wrapped lines in ChangeLog entries to line
> up with the *, and to finish sentences with a period.
done.
Tests re-run on x86_64-pc-linux-gnu , no change.
---
PR C++/113968
gcc/cp/ChangeLog:
* contracts.cc (grok_contract): Check for error_mark_node early
exit.
gcc/testsuite/ChangeLog:
* g++.dg/contracts/pr113968.C: New test.
Signed-off-by: Nina Ranns <dinka.ra...@gmail.com>
---
gcc/cp/contracts.cc | 7 ++++++
gcc/testsuite/g++.dg/contracts/pr113968.C | 29 +++++++++++++++++++++++
2 files changed, 36 insertions(+)
create mode 100644 gcc/testsuite/g++.dg/contracts/pr113968.C
diff --git a/gcc/cp/contracts.cc b/gcc/cp/contracts.cc
index 634e3cf4fa9..a7d0fdacf6e 100644
--- a/gcc/cp/contracts.cc
+++ b/gcc/cp/contracts.cc
@@ -750,6 +750,9 @@ tree
grok_contract (tree attribute, tree mode, tree result, cp_expr condition,
location_t loc)
{
+ if (condition == error_mark_node)
+ return error_mark_node;
+
tree_code code;
if (is_attribute_p ("assert", attribute))
code = ASSERTION_STMT;
@@ -785,6 +788,10 @@ grok_contract (tree attribute, tree mode, tree
result, cp_expr condition,
/* The condition is converted to bool. */
condition = finish_contract_condition (condition);
+
+ if (condition == error_mark_node)
+ return error_mark_node;
+
CONTRACT_CONDITION (contract) = condition;
return contract;
diff --git a/gcc/testsuite/g++.dg/contracts/pr113968.C
b/gcc/testsuite/g++.dg/contracts/pr113968.C
new file mode 100644
index 00000000000..fbaad1c930d
--- /dev/null
+++ b/gcc/testsuite/g++.dg/contracts/pr113968.C
@@ -0,0 +1,29 @@
+// check that an invalid contract condition doesn't cause an ICE
+// { dg-do compile }
+// { dg-options "-std=c++2a -fcontracts " }
+
+struct A
+{
+ A (A&);
+};
+struct S
+{
+ void f(A a)
+ [[ pre : a]] // { dg-error "could not convert" }
+ [[ pre : a.b]]// { dg-error "has no member" }
+ {
+
+ }
+};
+void f(A a)
+ [[ pre : a]] // { dg-error "could not convert" }
+ [[ pre : a.b]]// { dg-error "has no member" }
+ {
+ [[ assert : a ]]; // { dg-error "could not convert" }
+ [[ assert : a.b ]];// { dg-error "has no member" }
+ }
+
+int
+main ()
+{
+}
--
2.45.2
