[COMMITTED 19/35] gccrs: Fix ICE when using super mid way though path

[arthur . cohen]

From: Philip Herron <herron.phi...@googlemail.com>

Fixes Rust-GCC#3568

gcc/rust/ChangeLog:

        * resolve/rust-ast-resolve-path.cc (ResolvePath::resolve_path): check 
for super mid path

gcc/testsuite/ChangeLog:

        * rust/compile/nr2/exclude: nr2 puts out a different error multiple 
times
        * rust/compile/issue-3568.rs: New test.

Signed-off-by: Philip Herron <herron.phi...@googlemail.com>
---
 gcc/rust/resolve/rust-ast-resolve-path.cc | 6 ++++++
 gcc/testsuite/rust/compile/issue-3568.rs  | 7 +++++++
 gcc/testsuite/rust/compile/nr2/exclude    | 1 +
 3 files changed, 14 insertions(+)
 create mode 100644 gcc/testsuite/rust/compile/issue-3568.rs

diff --git a/gcc/rust/resolve/rust-ast-resolve-path.cc 
b/gcc/rust/resolve/rust-ast-resolve-path.cc
index b2b10719e19..530926d5d97 100644
--- a/gcc/rust/resolve/rust-ast-resolve-path.cc
+++ b/gcc/rust/resolve/rust-ast-resolve-path.cc
@@ -370,6 +370,12 @@ ResolvePath::resolve_path (AST::SimplePath &expr)
        }
       else if (segment.is_super_path_seg ())
        {
+         if (!is_first_segment)
+           {
+             rust_error_at (segment.get_locus (),
+                            "%<super%> can only be used in start position");
+             return UNKNOWN_NODEID;
+           }
          if (module_scope_id == crate_scope_id)
            {
              rust_error_at (segment.get_locus (),
diff --git a/gcc/testsuite/rust/compile/issue-3568.rs 
b/gcc/testsuite/rust/compile/issue-3568.rs
new file mode 100644
index 00000000000..222a174ef38
--- /dev/null
+++ b/gcc/testsuite/rust/compile/issue-3568.rs
@@ -0,0 +1,7 @@
+pub type T = ();
+mod foo {
+    pub use super::T;
+}
+
+pub use foo::super::foo::S as T;
+// { dg-error ".super. can only be used in start position" "" { target *-*-* } 
.-1 }
diff --git a/gcc/testsuite/rust/compile/nr2/exclude 
b/gcc/testsuite/rust/compile/nr2/exclude
index 71c2b682bf0..9273bd1489e 100644
--- a/gcc/testsuite/rust/compile/nr2/exclude
+++ b/gcc/testsuite/rust/compile/nr2/exclude
@@ -36,4 +36,5 @@ torture/alt_patterns1.rs
 torture/loop4.rs
 torture/loop8.rs
 torture/name_resolve1.rs
+issue-3568.rs
 # please don't delete the trailing newline
-- 
2.49.0