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-rw-r--r--src/interp/trace.boot2
1 files changed, 1 insertions, 1 deletions
diff --git a/src/interp/trace.boot b/src/interp/trace.boot
index e970f0af..8335b4b9 100644
--- a/src/interp/trace.boot
+++ b/src/interp/trace.boot
@@ -633,7 +633,7 @@ letPrint3(x,xval,printfn,currentFunction) ==
if flag='letPrint2 then print xval
if (y:= hasPair("BREAK",y)) and
(y="all" or MEMQ(x,y) and
- (not MEMQ(PNAME(x).0,'($ _#)) and not GENSYMP x)) then
+ (not (PNAME(x).0 in '($ _#)) and not GENSYMP x)) then
break [:bright currentFunction,'"breaks after",:bright x,'":= ",
xval]
x