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-rw-r--r--generic/tclIO.c9
1 files changed, 9 insertions, 0 deletions
diff --git a/generic/tclIO.c b/generic/tclIO.c
index a9091af..596ba3f 100644
--- a/generic/tclIO.c
+++ b/generic/tclIO.c
@@ -1548,6 +1548,15 @@ Tcl_CreateChannel(
*/
assert(sizeof(Tcl_ChannelTypeVersion) == sizeof(Tcl_DriverBlockModeProc *));
+ assert(NULL!=typePtr->closeProc);
+ assert(NULL!=typePtr->inputProc);
+ assert(NULL!=typePtr->outputProc);
+ assert(NULL!=typePtr->watchProc);
+ assert(NULL!=typePtr->truncateProc);
+ assert(NULL!=typePtr->getHandleProc);
+ if (NULL!=typePtr->wideSeekProc) {
+ assert(NULL!=typePtr->seekProc && "Must define seekProc if defining wideSeekProc");
+ }
/*
* JH: We could subsequently memset these to 0 to avoid the numerous