Add test

1 files changed, 21 insertions, 0 deletions

diff --git a/tests/lseq.test b/tests/lseq.test
index 6ec9bb2..a149908 100644
--- a/tests/lseq.test
+++ b/tests/lseq.test
@@ -21,6 +21,16 @@ testConstraint knownBug 0
 testConstraint has64BitLengths [expr {$tcl_platform(pointerSize) == 8}]
 testConstraint has32BitLengths [expr {$tcl_platform(pointerSize) == 4}]
 
+proc memusage {} {
+    set fd [open /proc/[pid]/statm]
+    set line [gets $fd]
+    if {[llength $line] != 7} {
+        error "Unexpected /proc/pid/statm format"
+    }
+    return [lindex $line 5]
+}
+testConstraint hasMemUsage [expr {![catch {memusage}]}]
+
 # Arg errors
 test lseq-1.1 {error cases} -body {
     lseq
@@ -707,6 +717,17 @@ test lseq-convertToList {does not result in a memory error} -body {
 	list [catch {set var1 [lindex [lreplace [lseq 1 2] 1 1 hello] 0]} cres] $cres
 } -cleanup {unset var1 cres} -result {1 {can't set "var1": this is an error}}
 
+test lseq-bug-54329e39c7 {does not cause memory bloat} -constraints {
+    hasMemUsage
+} -body {
+    set l [lseq 1000000]
+    proc p l {foreach x $l {}}
+    set premem [memusage]
+    p $l
+    set postmem [memusage]
+    expr {($postmem - $premem) < 10}
+} -result 1
+
 # cleanup
 ::tcltest::cleanupTests