rustc_trans: Disable landing pads on MSVC

Currently all these do is cause linker errors as they try to lower to GNU-like
exception handling, none of which exists with MSVC.

1 files changed, 6 insertions, 1 deletions

diff --git a/src/librustc_trans/trans/base.rs b/src/librustc_trans/trans/base.rs
index c2293dcc6d4..b382b71343f 100644
--- a/src/librustc_trans/trans/base.rs
+++ b/src/librustc_trans/trans/base.rs
@@ -756,7 +756,12 @@ pub fn invoke<'blk, 'tcx>(bcx: Block<'blk, 'tcx>,
 }
 
 pub fn need_invoke(bcx: Block) -> bool {
-    if bcx.sess().no_landing_pads() {
+    // FIXME(#25869) currently unwinding is not implemented for MSVC and our
+    //               normal unwinding infrastructure ends up just causing linker
+    //               errors with the current LLVM implementation, so landing
+    //               pads are disabled entirely for MSVC targets
+    if bcx.sess().no_landing_pads() ||
+       bcx.sess().target.target.options.is_like_msvc {
         return false;
     }