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https://github.com/fish-shell/fish-shell
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992c864f26
for-loops that were not inside a function could overwrite global
and universal variables with the loop variable. Avoid this by making
for-loop-variables local variables in their enclosing scope.
This means that if someone does:
set a global
for a in local; end
echo $a
The local $a will shadow the global one (but not be visible in child
scopes). Which is surprising, but less dangerous than the previous
behavior.
The detection whether the loop is running inside a function was failing
inside command substitutions. Remove this special handling of functions
alltogether, it's not needed anymore.
Fixes #6480
34 lines
658 B
Fish
34 lines
658 B
Fish
# RUN: %fish %s
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# A for-loop-variable is a local variable in the enclosing scope.
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set -g i global
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# implicit set -l i $i
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for i in local
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end
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set -ql i && echo $i
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# CHECK: local
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# The loop variable is initialized with any previous value.
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set -g j global
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for j in
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end
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set -ql j && echo $j
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# CHECK: global
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# Loop variables exist only locally in the enclosing local scope.
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# They do not modify other local/global/universal variables.
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set -g k global
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begin
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for k in local1
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echo $k
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# CHECK: local1
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for k in local2
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end
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echo $k
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# CHECK: local2
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end
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echo $k
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# CHECK: local1
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end
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echo $k
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# CHECK: global
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