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-rw-r--r--generic/tclAssembly.c3
1 files changed, 3 insertions, 0 deletions
diff --git a/generic/tclAssembly.c b/generic/tclAssembly.c
index 6d5676b..d02721d 100644
--- a/generic/tclAssembly.c
+++ b/generic/tclAssembly.c
@@ -3984,6 +3984,9 @@ UnstackExpiredCatches(
while (catchDepth > bbPtr->catchDepth) {
--catchDepth;
+ if (catches[catchDepth] == NULL) {
+ continue;
+ }
range = envPtr->exceptArrayPtr + catchIndices[catchDepth];
range->numCodeBytes = bbPtr->startOffset - range->codeOffset;
catches[catchDepth] = NULL;