FWIW, as Basic debugging checklist teaches, use diagnostics/ splain/ perldiag $ perl -e " $foo=[]; push $foo, 1 "
Type of arg 1 to push must be array (not scalar dereference) at -e lin
+e 1, at EOF
Execution of -e aborted due to compilation errors.
$ perl -Mdiagnostics -e " $foo=[]; push $foo, 1 "
Type of arg 1 to push must be array (not scalar dereference) at -e lin
+e 1, at EOF
Execution of -e aborted due to compilation errors (#1)
(F) This function requires the argument in that position to be of
+a
certain type. Arrays must be @NAME or @{EXPR}. Hashes must be
%NAME or %{EXPR}. No implicit dereferencing is allowed--use the
{EXPR} forms as an explicit dereference. See perlref.
Uncaught exception from user code:
Type of arg 1 to push must be array (not scalar dereference) a
+t -e line 1, at EOF
Execution of -e aborted due to compilation errors.
at -e line 1
$ splain
Type of arg 1 to push must be array (not scalar dereference) at -e lin
+e 1, at EOF
Type of arg 1 to push must be array (not scalar dereference) at -e lin
+e 1, at
EOF (#1)
(F) This function requires the argument in that position to be of
+a
certain type. Arrays must be @NAME or @{EXPR}. Hashes must be
%NAME or %{EXPR}. No implicit dereferencing is allowed--use the
{EXPR} forms as an explicit dereference. See perlref.
^Z
And there you have it Arrays must be @NAME or @{EXPR} :)
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