repl: fix getters triggering side effects during completion #1579

Job	Run time
Build slim tarball	1m 27s
aarch64-linux: with shared libraries	10m 4s
x86_64-linux: with shared libraries	10m 6s
x86_64-darwin: with shared libraries	10m 13s
aarch64-darwin: with shared libraries	10m 18s
	42m 8s

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