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| author | Lyra <teromene@teromene.fr> | 2023-01-24 14:15:42 +0100 |
|---|---|---|
| committer | Lyra <teromene@teromene.fr> | 2023-01-24 15:05:09 +0100 |
| commit | fc0c03dcf756c89694845484abd7d74ed080fdb6 (patch) | |
| tree | d728769a2cdced99b4b321063e7c786591a1e33f | |
| parent | 01c232573e8d9d9fac47ebfee8459e3b493ce278 (diff) | |
| download | gcc-fc0c03dcf756c89694845484abd7d74ed080fdb6.zip gcc-fc0c03dcf756c89694845484abd7d74ed080fdb6.tar.gz gcc-fc0c03dcf756c89694845484abd7d74ed080fdb6.tar.bz2 | |
Do not crash on empty macros expand. Fixes #1712
This commit fixes a compiler crash when expanding an empty macro into an existing AST.
Signed-off-by: Lyra Karenai <teromene@teromene.fr>
| -rw-r--r-- | gcc/rust/expand/rust-macro-expand.cc | 2 | ||||
| -rw-r--r-- | gcc/testsuite/rust/compile/macro45.rs | 7 |
2 files changed, 9 insertions, 0 deletions
diff --git a/gcc/rust/expand/rust-macro-expand.cc b/gcc/rust/expand/rust-macro-expand.cc index 5894434..36b3195 100644 --- a/gcc/rust/expand/rust-macro-expand.cc +++ b/gcc/rust/expand/rust-macro-expand.cc @@ -839,6 +839,8 @@ static AST::Fragment transcribe_expression (Parser<MacroInvocLexer> &parser) { auto expr = parser.parse_expr (); + if (expr == nullptr) + return AST::Fragment::create_error (); return AST::Fragment::complete ({std::move (expr)}); } diff --git a/gcc/testsuite/rust/compile/macro45.rs b/gcc/testsuite/rust/compile/macro45.rs new file mode 100644 index 0000000..52dbcbb --- /dev/null +++ b/gcc/testsuite/rust/compile/macro45.rs @@ -0,0 +1,7 @@ +macro_rules! empty { + () => {}; // { dg-error "found unexpected token '\}' in null denotation" } +} + +fn main() { + let a = empty!(); +} |