gistfile1.diff

diff --git a/src/core/interp.c b/src/core/interp.c
index 5d8f0d5..12f19af 100644
--- a/src/core/interp.c
+++ b/src/core/interp.c
@@ -3234,10 +3234,12 @@ void MVM_interp_run(MVMThreadContext *tc, void (*initial_invoke)(MVMThreadContex
                 cur_op += 4;
                 goto NEXT;
             OP(getstdin):
+                printf("getstdin error before? %s\n", strerror(errno));
                 if (!tc->instance->stdin_handle)
                     MVM_exception_throw_adhoc(tc, "STDIN filehandle was never initialized");
                 GET_REG(cur_op, 0).o = tc->instance->stdin_handle;
                 cur_op += 2;
+                printf("getstdin error after? %s\n", strerror(errno));
                 goto NEXT;
             OP(getstdout):
                 if (!tc->instance->stdout_handle)