Github user danielsun1106 commented on the pull request: https://github.com/apache/groovy/commit/c24c0b7e6a67dcdf277207d4261cfa6f2b55031f#commitcomment-27230310 In src/main/java/org/codehaus/groovy/classgen/asm/InvocationWriter.java: In src/main/java/org/codehaus/groovy/classgen/asm/InvocationWriter.java on line 483: > Is it acceptable groovy method dispatch depends on declared type? AFAIK, only closure supports `r()`, and native lambda supports the grammar too. > SAM types doesn't have to contain @FunctionalInterface. I think this check contradicts its documentation You're right :-)
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