[-- Attachment #1.1: Type: text/plain, Size: 143 bytes --] Hi guilers! When entering sleeping code in the REPL, then interrupting it (C-c) and entering ,bt twice, I receive an error message from ,bt: [-- Attachment #1.2: Type: text/plain, Size: 549 bytes --] GNU Guile 3.0.5 [...] Enter `,help' for help. scheme@(guile-user)> (let ((mu (make-mutex))) (with-mutex mu (wait-condition-variable (make-condition-variable) mu))) ^Cice-9/boot-9.scm:1669:16: In procedure raise-exception: User interrupt Entering a new prompt. Type `,bt' for a backtrace or `,q' to continue. scheme@(guile-user) [1]> ,bt In current input: 1:40 4 (_) In unknown file: While executing meta-command: In procedure program-code: Wrong type argument in position 1 (expecting PROGRAM_P): #t scheme@(guile-user) [1]> [-- Attachment #1.3: Type: text/plain, Size: 55 bytes --] I've found two variants so far, sleep/0 and sleep/1: [-- Attachment #1.4: Type: application/scheme, Size: 180 bytes --] [-- Attachment #1.5: Type: text/plain, Size: 46 bytes --] For sleep/1, the error message is different: [-- Attachment #1.6: Type: text/plain, Size: 445 bytes --] scheme@(guile-user)> (sleep/1) ^Cice-9/boot-9.scm:1669:16: In procedure raise-exception: User interrupt Entering a new prompt. Type `,bt' for a backtrace or `,q' to continue. scheme@(guile-user) [1]> ,bt In system/repl/repl.scm: 159:22 4 (_) In ice-9/boot-9.scm: 2170:4 3 (%start-stack _ _) In unknown file: While executing meta-command: In procedure frame-local-ref: Argument 2 out of range: 0 scheme@(guile-user) [1]> [-- Attachment #1.7: Type: text/plain, Size: 152 bytes --] Could folks familiar with interrupts, the REPL and backtraces take a look? Maxime. P.S. I'm not subscribed to bug-guile, please add me to To: or CC:. [-- Attachment #2: signature.asc --] [-- Type: application/pgp-signature, Size: 259 bytes --]