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7d48401707
The fix for SV 10593 caused recursive expansion errors when exporting a variable that contains a $(shell ...) invocation. If we see this type of recursion, ignore it and expand to the empty string rather than failing. * src/variable.h (env_recursion): New global variable. * src/variable.c (target_environment): If creating the environment for a $(shell ...) function increment env_recursion. Remove the check for expansion in a shell function context. * src/expand.c (recursively_expand_for_file): Check for recursive expansion in a $(shell ...) environment context and if present, show the verbose message and return the empty string. * tests/scripts/functions/shell: Add a test for this situation.