[mini] Fail methods that try to throw scalars. Fix hard crash from #42417. (#3312)

diff --git a/mono/mini/method-to-ir.c b/mono/mini/method-to-ir.c
index c7ca275b134fe12dccc3803d1958b81a1bad99b7..386a319cc50234118d4e32d940a370c1d0833609 100644 (file)
--- a/mono/mini/method-to-ir.c
+++ b/mono/mini/method-to-ir.c
@@ -12283,6 +12283,9 @@ mono_method_to_ir (MonoCompile *cfg, MonoMethod *method, MonoBasicBlock *start_b
                }
                case CEE_THROW:
                        CHECK_STACK (1);
+                       if (sp [-1]->type != STACK_OBJ)
+                               UNVERIFIED;
+
                        MONO_INST_NEW (cfg, ins, OP_THROW);
                        --sp;
                        ins->sreg1 = sp [0]->dreg;