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-rw-r--r--Test/D04parameter.ztst18
1 files changed, 18 insertions, 0 deletions
diff --git a/Test/D04parameter.ztst b/Test/D04parameter.ztst
index 063007956..75ace5a9b 100644
--- a/Test/D04parameter.ztst
+++ b/Test/D04parameter.ztst
@@ -1718,6 +1718,24 @@
 >2
 >2
 
+  SHLVL=1
+  $ZTST_testdir/../Src/zsh -fc 'sh -c "echo \$SHLVL"'
+  $ZTST_testdir/../Src/zsh -fc '(sh -c "echo \$SHLVL")'
+  $ZTST_testdir/../Src/zsh -fc '( (sh -c "echo \$SHLVL"))'
+0:SHLVL decremented upon implicit exec optimisation
+>1
+>1
+>1
+
+  SHLVL=1
+  $ZTST_testdir/../Src/zsh -fc '(sh -c "echo \$SHLVL"); exit'
+  $ZTST_testdir/../Src/zsh -fc '(exec sh -c "echo \$SHLVL"); exit'
+  $ZTST_testdir/../Src/zsh -fc '( (sh -c "echo \$SHLVL"); exit)'
+0:SHLVL not decremented upon exec in subshells
+>2
+>2
+>2
+
 # The following tests the return behaviour of parsestr/parsestrnoerr
   alias param-test-alias='print $'\''\x45xpanded in substitution'\' 
   param='$(param-test-alias)'